19 Oct 2026
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Otis Elevator & Escalator Spare Parts Catalog

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Otis Elevator & Escalator Spare Parts Catalog — 977 Parts with ID, Function, Repair Guide & Maintenance Tips

ONE ELEVATOR maintains one of the widest independent stocks of Otis spare parts — 977 part numbers covering control & drive systems, door operators, hoistway and car electrics, escalator mechanics and electrics, safety devices and traction components. Every part number below is cross-matched by interface specification, not by OEM label, so you can replace a superseded Otis reference without re-engineering the unit. Use the search box to find a part number in seconds, or jump straight to a system group.

977Part numbers
13System groups
2Platforms: elevator + escalator
Same dayDispatch on stocked items

Table of Contents

Showing 977 of 977 parts
No match. Try a shorter string — for example the bare number GAA26140F, or the system name comb plate. You can also send us a photo of the original part label and we will identify it for you.
Ordering note: Otis supersedes references frequently and suffix codes are not interchangeable — for example GAA177HB1 is PNP (active high) while GAA177HB2 is NPN (active low): pin-compatible, logic reversed. Send us the original part number with suffix, a photo of the front and back of the original part, the controller type and the drive nameplate, and we will confirm the correct replacement before you pay.

What we supply

Control & drive boards

LCB-II, MCB-II / MCB-III, RCB-I / RCB-II, GECB / GECB-AP, GDCB, TO-30 / TO-40 legacy racks, OVF20 / OVF30 / ReGen inverter drives, brake control cards and serial communication nodes.

Door systems

AT120, AT400, DO2000, DO3000, DCSS IV / DCSS VE / DCSS5-E, GLIDE, AMCB and XRDS door operators, controllers, motors, hangers, sills, vanes, locks and light curtains.

Escalator & moving walk

Steps, step chains, sprockets and rollers, comb and floor plates, handrail drive wheels and chains, skirt brushes, ECB / ECB-II boards, safety interlocks and brake magnets for 506 / 506NCE / NEXTSTEP / 510 / 520 and Trav-O-Lator.

Safety & traction

Overspeed governors, PS35A / PS35S progressive safety gears, buffers, rope grippers, encoders, composite steel belts, wire rope, guide shoes and belt monitoring devices.

How to order the right Otis part — five details we need

  1. Original part number with its full suffix. The suffix decides logic level, voltage class and firmware generation.
  2. Photo of the original part, front and back. Board revisions with identical numbers can differ in connector population.
  3. Unit nameplate. Model, rated load, rated speed and serial number let us confirm the platform generation.
  4. Controller type. GECB, GDCB, MCB-III, LCB-II, RCB-II — this determines which board family fits.
  5. Drive nameplate. For inverters, the kW / A rating and input voltage class must match the original exactly.

Full part number index by system

233Control & Drive Systems

Controllers, inverter drives, main boards, serial communication nodes and brake control cards — the logic and power core of the elevator or escalator.

What these parts do

Runs travel logic, monitors the safety circuit, registers car and hall calls, and outputs torque commands to the drive. Board types map strictly to platform: LCB-II / MCB-II / MCB-III, RCB-I / RCB-II, GECB / GECB-AP, GDCB, TO-30 / TO-40 legacy racks.

Common failure symptoms

Dead or blank display, I/O points dead, serial bus (RSL) communication lost, EEPROM parameter loss, no display after power-up, drive trips on over-current / over-voltage.

Repair & replacement guide

1) Measure DC24 V / DC5 V rails and fuses first. 2) Cold-reset: power down 30 s and re-apply. 3) Read the self-diagnostic fault code before swapping anything. 4) Back up parameters and photograph every jumper and DIP switch before removal. 5) After replacement run self-learn / re-commissioning and test every I/O point.

Maintenance & replacement tips

Always de-energise before plugging boards and use ESD protection. Clean the cabinet and re-torque terminals every 12 months. Failed boards are usually repairable through exchange channels at 30–50 % of new-board cost. Power spare boards up every 6 months to keep them dry.

Part No.DescriptionApplication / Unit
616G34EPRON GOD FOR MCS 310-Z30MCS
616G49EPRON GOC FOR MCS 312-Z29MCS
70AMPSwith VA1+XU1boardMatch against the unit nameplate
A.9673AFMLBMatch against the unit nameplate
A9673AFTO-30-MLBMatch against the unit nameplate
A9673WTO-30-EB-3Match against the unit nameplate
A9693DRCB-I main control boardOtis early models
A9693D2BoardMatch against the unit nameplate
A9693FSOM BoardMatch against the unit nameplate
AAA21305Q1AAA21305Q1Match against the unit nameplate
AAA26800GG1PCB Ansi Speed Check AscbMatch against the unit nameplate
AAA26800UX2UX2Match against the unit nameplate
ABA26800ABL001ABL001Match against the unit nameplate
ABA26800AKT1ABA26800AKT1Match against the unit nameplate
ABA26800AKT1 / ACA26800AKT1GDCB main control boardOtis ReGen drive platform
ABA26800GW4ABA26800GW4Match against the unit nameplate
ABA26800RB170AMPS Inverter BaordMatch against the unit nameplate
ABA26800SY1LEMMatch against the unit nameplate
ABA26800XU1XU1Match against the unit nameplate
ABA26800XU2Interface Board (LVIB) 22kwMatch against the unit nameplate
ABA26800XU5Interface Board (LVIB) 32kwMatch against the unit nameplate
ACA21290BA2OVF 30 drive (120 Amp.)Match against the unit nameplate
ACA21290BA4ACA21290BA4Match against the unit nameplate
ACA21290BJ2OVF 30 drive (90 Amp.)Match against the unit nameplate
ACA21290BM1Inverter (DBSS) 32 KW,210 AMatch against the unit nameplate
ACA21290BM1 (AAA21290BM1 / ABA21290BM1)OVF30 inverter drive 210 AOtis high-speed / heavy-load (84 A / 210 A)
ACA26800BA20BA2Match against the unit nameplate
ACA26800UD2Inverter BoardMatch against the unit nameplate
ACA26800VA1VA1Match against the unit nameplate
ADA21290AK2OVF30 inverter driveOtis OVF30 platform
ADA26800MB1ADA26800MB1Match against the unit nameplate
ADA26800VA1Processor BoardMatch against the unit nameplate
ADA26800VF1VF1Match against the unit nameplate
AEA26800AML1GECB main cardOtis GECB platform
B9693AE1RsebMatch against the unit nameplate
B9693MG1ADISS(home-made)Match against the unit nameplate
D.9673TLBMatch against the unit nameplate
DAA21305AY4LRU-402 inverter driveOtis LRU series
DAA21305Z2LCRD404-LRU inverter driveOtis LRU series
DAA23550NNP1RS13(domestic)Match against the unit nameplate
DAA25005C1Address / car communication boardMultiple Otis platforms
DAA25140NN6Dual 8 Codified board chinese(three in one)Match against the unit nameplate
DAA25140NNN14Dual 8 Codified board chinese(three in one)Match against the unit nameplate
DAA25140NNN2Dual 8 parallel connection Codified board Chinese(three in one)Match against the unit nameplate
DAA25140NNP10Dual 8 Codified board(three in one) (English)Match against the unit nameplate
DAA25140NNP14Dual 8 parallel connection Codified board(three in one) (Chinese)Match against the unit nameplate
DAA26800J1Rseb NEWMatch against the unit nameplate
DAA330E213VTR trig loop 11KW13VTR
DAA346AJ1The motor housings 13VTR13VTR
DAA494NPA2To driveMatch against the unit nameplate
DAA621E1Additional power box GEN2 usingGen2
DAA7004D1Bottom pit repair box GEN2Gen2
DBA26800EE13/EE14/EE9GECB main boardOtis GECB platform models
DDA26800AY7GECB-AP main control boardOtis GECB-AP platform
EA610XJ1GpcbMatch against the unit nameplate
FAA21700F1Steel belt testerMatch against the unit nameplate
FAA25000E1LTB(GEN2)Gen2
FAA25000E1 / FBA610B1Car-top terminal boardMultiple Otis platforms
G0161G44EPRON FOR MCS 310-Z29MCS
G0616G50EPRON FOR MCS 312-Z30MCS
GAA21230F2Lb-iiMatch against the unit nameplate
GAA21340P10GEN2 Inverter 1600KG aboveGen2
GAA21343C1OVF 20 CRMatch against the unit nameplate
GAA21382H1GEN2 InverterGen2
GAA225JK1InverterMatch against the unit nameplate
GAA23550D1RS5 OriginMatch against the unit nameplate
GAA23550E1RS5 ChinaMatch against the unit nameplate
GAA25005B1RS14 /GDA25006B1 GermanyMatch against the unit nameplate
GAA25005C1RS14 ChinaMatch against the unit nameplate
GAA26800AL1Som-ii GEA26800AL1Match against the unit nameplate
GAA26800AL2Som-iiMatch against the unit nameplate
GAA26800AL3GAA26800AL3Match against the unit nameplate
GAA26800BG1BG1Match against the unit nameplate
GAA26800K1Main control boardMultiple Otis platforms
GAA26800KB1SPBC Board For Otis Gen2Gen2
GAA26800KB1 / GBA26800NB1SPBC brake boardOtis Gen2
GAA26800KP1PdbiiMatch against the unit nameplate
GAA26800KS1Spb-ansMatch against the unit nameplate
GAA26803A1GAA26803A1Match against the unit nameplate
GAA26810C2WWPB-2 (GEN2)WWPDB (GBA26810A1)Gen2
GAA26810C2 (GBA26810A1)Hoistway terminal boardOtis Gen2
GAA30083AAD1Lcbii ChipLCB-II
GAA30084BAB031TCBCZ31 ChipMatch against the unit nameplate
GAA30328AAG1EpromMatch against the unit nameplate
GBA21230F1 / F10LB-II main control boardOtis early economy models
GBA21230F10LB2(The housing ladder)Match against the unit nameplate
GBA25005A1RS11Match against the unit nameplate
GBA25005D10HBBMatch against the unit nameplate
GBA26800KC1GDBMatch against the unit nameplate
GBA26800KM1Spbc IIMatch against the unit nameplate
GBA26800KX1Spbc IIIMatch against the unit nameplate
GBA26800LC2Gecb-en /GDA26800LJ2Match against the unit nameplate
GCA21150C10Inverter OVF20-9KWOVF20
GCA21150D1OVF20 inverter drive 15 kWOtis small to medium load elevators
GCA21150D10Inverter OVF20-15KWOVF20
GCA21342B1OVF20CR inverter driveOtis low- to mid-speed elevators
GCA26800BB1SPBB1(GEN2)Gen2
GCA26800BB1 / BB2 (GBA)SPB brake control boardOtis 2000VF / 3000VF
GCA26800BB2BB2(GEN2) (GBA)Gen2
GCA26800H1 / H2MCB-II main control boardOtis MCB-II platform
GCA26800H10Mcb-iiMatch against the unit nameplate
GCA26800H2Mcbii W/vcrMatch against the unit nameplate
GCA26800J5Inverter control boardOtis OVF series
GCA26800KA10TCBCMatch against the unit nameplate
GCA26800KF10 / KF20MCB-III main control boardOtis MCB-III platform
GCA26800KF20MCB3Match against the unit nameplate
GCA26800KG4DCB-II door control boardOtis 2000VF / 3000VF
GCA26800KV3MCB3XMatch against the unit nameplate
GCA26800KV7MCB3XMatch against the unit nameplate
GCA610XA1RS-11Match against the unit nameplate
GDA21341M1Inverter / VVVF driveMultiple Otis platforms
GDA25005C20RS18 serial communication boardOtis RS18 platform
GDA26800J10PDB (Power Drive Board) 9kwMatch against the unit nameplate
GDA26800J20PDB (Power Drive Board) 5kwMatch against the unit nameplate
GDA26800J50PDB (Power Drive Board) 15kwMatch against the unit nameplate
GDA26800KA1Can(tcbc)Match against the unit nameplate
GDA26800KA2TCBC GIMatch against the unit nameplate
GDA26800NR2GECB main control boardOtis Gen2 / Gen3 (early GECB platform)
GEA21270A1OTIS Xizi Lmcs-mcb Cb-iiXizi Otis / MCS
GEA21310A1ReGen regenerative driveOtis energy-saving retrofit projects
GEA25005B1RS14 serial communication boardOtis RS14 platform
GEA26800AL10SOM BoardMatch against the unit nameplate
GFA21230F1Lb-ii GCA610YW1Match against the unit nameplate
GFA21240D1LCB-II main control boardOtis 2000VF / 3000VF / CHVF
GFA23550D1RS-5J serial communication boardOtis RS-5 upgrade projects
GGA21270A1Rcb-iiMatch against the unit nameplate
GHA21270A1 / GGA21270A1RCB-II main control boardOtis RCB-II platform
GOA9673GP1TO-30-IBMatch against the unit nameplate
JAA25140AAC102XO/single 8 Codified board English(dual tier) (upgrade type)Match against the unit nameplate
JAA25140AAD106XO/single 8 board Chinese(dual tier)Match against the unit nameplate
JAA25140AAD126XO/dual 8 parallel connection Codified board English(dual tier)Match against the unit nameplate
JAA26805AAA201DissMatch against the unit nameplate
JAA26807BAR001LDB boardMultiple Otis platforms
JAC26801AAJ004RCPMatch against the unit nameplate
JBA26801AANInterfere with the absorption board(import)Match against the unit nameplate
JBA26801AAXInterfere with the absorption board(import)Match against the unit nameplate
JFA26801AAF002Lmcss-mcb MCS 321 MCS321M-OVF30 SystemMCS / OVF30
JGA26801AAF002Mcb(mcss)MCS
JGA26801AAF105LmcssMCS
JO260AD4517CT traction machine17CT
KBA21305ABZ6LRU-402 inverter driveOtis LRU series
KBA21310ABD2OVFR03B-401 inverter driveOtis mid- to high-speed elevators
KEA21305ACB1OVFR3B-403 inverter driveOtis energy-saving models
OH1000HCB board( using) XAA610S1Match against the unit nameplate
RS5-C3RS5-C3Match against the unit nameplate
SOM-A9693FSOM-A9693FMatch against the unit nameplate
TAA330BA1160VAT trig loop160VAT
TAA384CJ2The motor housings 16VAT16VAT
TAB260B16Traction machine 18ATF18ATF
TAB330AJ118ATF trig loop18ATF
TO-30-LBD9673T-3Match against the unit nameplate
TO-40-BAKBJOA 6840GD 1Match against the unit nameplate
TO-40-CIBGOB 9687 D1Match against the unit nameplate
TO-40-CUB2JOE 6840FV 2Match against the unit nameplate
TO-40-CUBIJOA 6840FT 1Match against the unit nameplate
TO-40-IIBJOC 6840RH 8Match against the unit nameplate
TO-40-MIBDO 6840F 1Match against the unit nameplate
TO-40-MP3LB JO 6840RH 8Match against the unit nameplate
TO-40-NPWL-LA03N62P10005Match against the unit nameplate
TO-40-SGBJO 6840FR 3Match against the unit nameplate
TO-40-TTBJOA 6840FP 1Match against the unit nameplate
XAA20236B1ECH3 trig loop(020)Match against the unit nameplate
XAA20236B2ECH3 trig loop(021)Match against the unit nameplate
XAA23550A1RS-5(homegrown PCB)Match against the unit nameplate
XAA23550A2XO/single 8 Codified board Chinese(two-in-one)Match against the unit nameplate
XAA23550A3XO/dual 8 Codified board chinese(two-in-one)Match against the unit nameplate
XAA23550A4XO/single 8 parallel connection Codified board Chinese(two-in-one)Match against the unit nameplate
XAA23550A5XO/dual 8 parallel connection Codified board(two-in-one)Match against the unit nameplate
XAA23550B1Single 8 parallel connection Codified board Chinese(three in one)Match against the unit nameplate
XAA23550B3XO/single 8 Codified board chinese(three in one)Match against the unit nameplate
XAA23550B4XO/dual 8 Codified board Chinese(three in one)Match against the unit nameplate
XAA23550J1XRDS serial nodeOtis early serial platforms
XAA24350J1XRDS(portal crane board)Match against the unit nameplate
XAA24720E1Square fanMatch against the unit nameplate
XAA24720J1Crosscurrent fan(lower power)Match against the unit nameplate
XAA24720J2Crosscurrent fan(high power 422A)Match against the unit nameplate
XAA25140AAF122XO/dual 8 parallel connection Codified board English(dual tier)Match against the unit nameplate
XAA25302C1HDZ-200D2 electric powerMatch against the unit nameplate
XAA25302C3HDZ-200D3 electric powerMatch against the unit nameplate
XAA301H1VG5 fanMatch against the unit nameplate
XAA308GV1Annex power packMatch against the unit nameplate
XAA384FN1The motor housings 140VAT140VAT
XAA610AB1CardDI-08Match against the unit nameplate
XAA610AB2CardDO-08Match against the unit nameplate
XAA610AC1SPB brake boardAll Otis models
XAA610AE1Serial interface board using for control cabinetMatch against the unit nameplate
XAA610AH1SOM(homegrown)Match against the unit nameplate
XAA610AH1 / GAA26800AL2SOM moduleMultiple Otis platforms
XAA610AK1RS-5Match against the unit nameplate
XAA610AK1 / XAA23550A1RS-5 serial communication boardOtis RS-5 platform
XAA610AM1ACBII(homegrown LCBII)LCB-II
XAA610E1Oms(es-sw Board)Match against the unit nameplate
XAA610K3LPB2 boardAll Otis models
XAA610P1RSEB(homegrown)Match against the unit nameplate
XAA610P1 / B9693AE1RSEB rescue / emergency boardAll Otis models
XAA610Q1AMCBI door operator control boardOtis early models
XAA610W1AMCBII asynchronous door operator control boardOtis 3000VF and others
XAA616AJ1CardPG-B2Match against the unit nameplate
XAA616AK2Card-reader-outside the hall RFC08Match against the unit nameplate
XAA616AK3Card-reader-outside the hall RFC07Match against the unit nameplate
XAA616AL1IC cardMatch against the unit nameplate
XAA616AL2Inverter Frequency division card-SIEI(APC100-1)Match against the unit nameplate
XAA616AL4Inverter expansion cards-SIEI(EXP-D16card)Match against the unit nameplate
XAA616AL8Inverter expansion cards-SIEI(EXP-E-TL card)Match against the unit nameplate
XAA616BG1Read-punch read in machineMatch against the unit nameplate
XAA616BN1Inverter expansion cards(EXP-DBSS card)Match against the unit nameplate
XAA616BR1Siwei Inverter PCBMatch against the unit nameplate
XAA622R18CHInverter -SIEI 7.5KW(with the gear)Match against the unit nameplate
XAA622R19CHInverter-SIEI 11KW(with the gear)Match against the unit nameplate
XAA622R20CHInverter-SIEI 15KW(with the gear)Match against the unit nameplate
XAA622R21CHInverter-SIEI 18.5(with the gear)Match against the unit nameplate
XAA622R22CHInverter-SIEI 22KW(with the gear)Match against the unit nameplate
XAA622R23SIEI30KW Inverter(with the gear)Match against the unit nameplate
XAA642A19693 BoardMatch against the unit nameplate
XIZI2000Siwei Inverter PCB OTIS MODEL-OH-5000Xizi Otis
—LB IIMatch against the unit nameplate
—13VTR Machine13VTR
—Cedes PhotocellMatch against the unit nameplate
—18ATF machine18ATF
—TCBC GDA 26800 K 10Match against the unit nameplate
—MCB 3 GCA 26800 KF 10Match against the unit nameplate
—PDB GDA 26800 J10Match against the unit nameplate
—MCB ll GDA 26800 H10Match against the unit nameplate
—Drive Control Board GCA 26800 AH50/5KWMatch against the unit nameplate
—13VTR MACHINE the same to the spain140VAT13VTR / 140VAT
—220V electric power JZC1(3TH82 4 open 4 closed)Match against the unit nameplate
—Dual 8 Codified board Chinese(two-in-one) new typeMatch against the unit nameplate
—XVF single 8 Codified board chinese(three in one)Match against the unit nameplate
—Single 8 Codified board chinese(three in one) KEYMatch against the unit nameplate
—Air outlet 463×43 open holes 483×93 40W car fanMatch against the unit nameplate
—Air outlet 450×43 open holes 473×93 40W car fan(1042)Match against the unit nameplate
—Air outlet 268×43 open holes 383×93 40W car fan(9B)Match against the unit nameplate
—Car fan(goods elevator)Match against the unit nameplate

69Door Systems

Door operators, controllers, motors, hangers, tracks, sills, vanes, locks, light curtains and timing belts for Otis landing and car doors.

What these parts do

Drives door opening and closing, carries the door panels, locks the landing door and protects passengers in the door zone. Covers AT120, AT400, DO2000, DO3000, DCSS IV / DCSS VE / DCSS5-E, GLIDE, AMCB and XRDS platforms.

Common failure symptoms

Door does not move, repeated re-opening cycles, nuisance torque / obstruction faults, grinding noise, door lock feedback lost.

Repair & replacement guide

1) Rule out mechanical binding (sill groove, track, hanger rollers) before blaming electronics. 2) Measure door motor windings and insulation. 3) Re-run door-width self-learn after any controller or motor change. 4) Check vane-to-lock-roller engagement depth (approx. 3–5 mm).

Maintenance & replacement tips

Clean sill grooves and tracks monthly; set timing-belt tension and inspect hanger rollers quarterly. Always replace hanger rollers and timing belts in pairs. Never bridge or jumper the door lock circuit.

Part No.DescriptionApplication / Unit
25F-FAA23050GAT120 Door Blet ClipsAT120
AAA24350BL1 / BL2AT400 door motorOtis AT400
AAA25580AL4AT400 door controllerOtis AT400
ACA24591R1LAMDA3 control boxMatch against the unit nameplate
B9693MG2Alternate Door Interface SubsystemMatch against the unit nameplate
C9693MB1Door Interface SubsystemMatch against the unit nameplate
DAA24350R1AC door motorOtis universal door operators
DAA24392J2 / J102Anti-trapping door vaneOtis door operators
DAA24591R2Door light curtain (emitter / receiver / PSU)Otis door protection systems
DAA389AR1-8Door panel assemblyAll Otis door operators
DAA610F1Braking vane EG-SW G2D90FCMatch against the unit nameplate
Door ContactDoor contactAll Otis elevator models
Door Motor BeltDoor operator timing beltDO2000 / AT120 and others
F.FBA24350AM / FBA24350FDO2000 door motorOtis DO2000
FAA149CM1DO2000 timing belt clampOtis DO2000
FAA198V1Kit of door pulleyMatch against the unit nameplate
FAA23450BK1AT120 Door ControllerAT120
FAA24350BK1AT120 door control boxOtis AT120 door operator
FAA24350BL1AT120 Motor FAA 24350BL2AT120
FAA24350BM1AT120 Door PowerAT120
FAA24350BM3AT120 door operator transformerOtis AT120
FAA24390H1 / H2Door vaneAll Otis door operators
FAA409DX3 / DX5Door track / railOtis door operators
FAA431B1GEN2 The base station lockGen2
FAA456RA1Lock RollerMatch against the unit nameplate
FAA456X1Door hanger rollerOtis door operators
FAA483T1DOOR SILL L=2115mmMatch against the unit nameplate
FAA5394A50DOOR ROLLER 55*16.5mmMatch against the unit nameplate
FAA633B1Door EncoderMatch against the unit nameplate
FAA717B1Timing beltDO2000
FAA76D3Kit of door pulleyMatch against the unit nameplate
FBA198H1Timing beltDO2000
FBA280J1 / J2Door sillOtis landing doors
FEA24390C1OTIS2000 door vaneMatch against the unit nameplate
GAA24350BH1GAA24350BH1Match against the unit nameplate
GAA24350BP1GLIDE door driveOtis AT120 retrofit projects
GAA456AY1Door rollerMatch against the unit nameplate
GBA24350AW11DO2000 door control box (blue)Otis DO2000 (early version)
GBA24350BH1DCSS5-E door controllerOtis DCSS5-E
GCA633A1Door EncoderMatch against the unit nameplate
GDA24350AW11DCSS 4 second handMatch against the unit nameplate
GDA24350BD11DO2000 door controller (black)Otis DO2000 door operator
GDA24350BH1DCSS VEMatch against the unit nameplate
GDA24353K1DCSS5-E main control boardOtis DCSS5-E
GFA24350AW1DCSS IV door controllerOtis DCSS IV
GJA24350BD11DCSS VE door controllerOtis DCSS VE door operator
HAA24354A3 / PM81855DDoor motorOtis universal door operators
HAA24360G Ser.DO3000 door controllerOtis DO3000
HAA426D1-D5Door sillOtis landing / car doors
HBA24360G11 / G13DO3000 door inverterOtis DO3000
HCA24350B Ser.DO3000 door operator assemblyOtis DO3000
Landing Door Shoe / GibDoor slider (door shoe)Xizi Otis / Otis landing doors
PAA24520A1 / A2 / A3 / A4Landing door lockOtis landing doors (all models)
PB-D16door lockMatch against the unit nameplate
XAA177AP2Door lock over travel-limit switch X2-11Match against the unit nameplate
XAA177CR1Passive door lockMatch against the unit nameplate
XAA20500H1XRDS-80J1 door motor 80 WOtis early compact door operators
XAA24350AF1CEDES control boxMatch against the unit nameplate
XAA320AB1Hall door shock leatherMatch against the unit nameplate
XAA431G1Sundries elevator door lock G2Match against the unit nameplate
XAA431H1Electric door lock 21VF21VF
XAA431J1Operate box hook lock(passenger-goods lift) XAA431AA2Match against the unit nameplate
XAA431R1Door lock 161Match against the unit nameplate
XAA431Y1Door lock 10.4 aroundMatch against the unit nameplate
XAA431Z1Electric door lock (DS-4)Match against the unit nameplate
XAA633AC1Coder DO2000(Home made)DO2000
—Door Skate TechnaMatch against the unit nameplate
—Door Hanger Roller 85*20-6204Match against the unit nameplate
—DCSS 5 black box GJA 24350 BD 11 secondhandMatch against the unit nameplate

208Hoistway & Car Electrics

Push buttons, hall and car displays, position sensors, levelling switches, weighing devices, inspection boxes, terminal boards and car-top communication units.

What these parts do

Collects passenger commands, detects car position, drives indicators and provides inspection control — the human interface and the source of every travel decision.

Common failure symptoms

Communication lost, missing segments or blank display, sticky buttons, false triggering, short circuits from moisture.

Repair & replacement guide

1) Check the 24 V supply and the shield/earth of the serial line. 2) Locate the faulty node by segment substitution. 3) Verify address DIP settings and the version suffix. 4) Run a functional test after replacement.

Maintenance & replacement tips

Car-top and pit boxes must be sealed against water; inspect immediately after any water ingress. Clean sensor faces quarterly. Replace high-cycle items such as buttons every 2–3 years as prevention.

Part No.DescriptionApplication / Unit
11-15KWtransducer fan MMF06024DSMatch against the unit nameplate
5915PC22TB22KW transducer fanMatch against the unit nameplate
A4N242767Push button 020All Otis models
AAA174VZ1LAMDA3 optical screen lineMatch against the unit nameplate
AAA23500AM1Stainless Steel ButtonMatch against the unit nameplate
AAA23500M4LANTER Landing Direction Indicator(import)Match against the unit nameplate
AAA24591K1ELD powerMatch against the unit nameplate
ABA24591T8Optical screen LAMBDAIII(OTIS)Match against the unit nameplate
AD111Button glow FAA 25090Match against the unit nameplate
ADB23570AAA001Screen copy shows ELD outside the hallMatch against the unit nameplate
ADB23750AAA004Screen copy shows ELD carMatch against the unit nameplate
ARD / Emergency Rescue DeviceARD emergency levelling deviceAll Otis models (modernisation)
ASW0335Key switch start-up IND CONT 858TMatch against the unit nameplate
BR34ACall box double/and with fire-control/middle/ XAA23500FD10-A(hair line)Match against the unit nameplate
BR34G / BR34GBHBP16 hall call buttonAll Otis models
BS34ACall box single/and/without fire-control/middle/ XAA23500EK2-AMatch against the unit nameplate
Car LED LightingCar LED lightingAll Otis elevator models
Car Top Inspection BoxCar-top inspection boxAll Otis elevator models
CPI-L0640HRB / XOA3667AVG0016.4" in-car LED display boardOtis premium models
DAA / DBA26800AM1 / AM2 / FM1 / FM2In-car display boardMultiple Otis platforms
DAA175D1Bottom pit stop switch box GEN2Gen2
DAA177AX2Escalator sensorMatch against the unit nameplate
DAA24831AE1Pit inspection boxAll Otis models
DAA25005A2DAA25005A2Match against the unit nameplate
DAA25140NNN613Match against the unit nameplate
DAA26800CB2 / CB1 / EL1 / FE1CSPB car-top communication boardMultiple Otis platforms
DCA / DBA / DAA26800CR1 / CR3 / AS1 / AS3Hall call display boardMultiple Otis platforms
E2E-X / Proximity SwitchProximity switchAll Otis models
EL1376power switch XAA177EC1Match against the unit nameplate
FAA147CH23Hall Button BoxMatch against the unit nameplate
FAA147CH33Hall Button BoxMatch against the unit nameplate
FAA147CH63Hall Button BoxMatch against the unit nameplate
FAA177AJ1FAA177AJ1Match against the unit nameplate
FAA25090A111Push buttonMatch against the unit nameplate
FAA25090A112PUSH BUTTON(green) A312 buttonMatch against the unit nameplate
FAA25090J114DOBMatch against the unit nameplate
FAA25100J1CPI 10 (Car Position Indicator)510
FAA25100K1LCD show510
FAA25250C1CPI 11 (ELD Display)Match against the unit nameplate
FAA431E1424V KEY SwitchMatch against the unit nameplate
FAA470E1Hairy SliderMatch against the unit nameplate
FDA23600V1Landing IndicatorMatch against the unit nameplate
GAA177BH5Car top inductor (GEN2)Gen2
GAA177HB1Magnet Switch PNPMatch against the unit nameplate
GAA177HB1 / HB2 / HB3 / HB4 / HB5Hall-effect levelling sensor switchIP66 rated; all Otis platforms
GAA177HB2Magnet Switch PNPMatch against the unit nameplate
GAA177HB4Magnet Switch PNPMatch against the unit nameplate
GAA177HB5Magnet Switch PNPMatch against the unit nameplate
GAA177HB6Magnet Switch NPNMatch against the unit nameplate
GAA177HR1original only have 1~2 pieceMatch against the unit nameplate
GAA20401A515Pulse transducerMatch against the unit nameplate
GAA22439E12GEN2 Head Reader With SAC (OVF20)Gen2 / OVF20
GAA22439E2 / E11PRS hoistway position readerOtis Gen2 absolute positioning system
GAA24270AB2LWB(weighing device)Match against the unit nameplate
GAA25005F1Match against the unit nameplate
GAA25005G1Key switch boxAll Otis models
GAA2500F1GAA2500F1Match against the unit nameplate
GAA26220AM1Operation PanelMatch against the unit nameplate
GAA26220AM2Operation PanelMatch against the unit nameplate
GAA26220AM5Operation PanelMatch against the unit nameplate
GAA26220AM500Operation Panel KEYMatch against the unit nameplate
GAA26220AM6Operation PanelMatch against the unit nameplate
GAA26220BD2Operation PanelMatch against the unit nameplate
GAA26220BD3Operation PanelMatch against the unit nameplate
GAA26220BD4Operation PanelMatch against the unit nameplate
GAA26220BD5Operation PanelMatch against the unit nameplate
GAB26220DB3Operation PanelMatch against the unit nameplate
GAB26220DB4Operation PanelMatch against the unit nameplate
GAB26220DB5Operation PanelMatch against the unit nameplate
GBA250005D1Show PCBMatch against the unit nameplate
GDA25005B10RS 14 (Remote Station 14)Match against the unit nameplate
GEA23550DICproduct from GermanyMatch against the unit nameplate
GO177BHEscalator sensorMatch against the unit nameplate
HBA26800AF1 / AF2CSPB3 car-top communication boardOtis Gen2 / Gen3
HBP12 / HBP22Hall call boxAll Otis models
JAA25140AAB003Single 8 Control box core(import)Match against the unit nameplate
JAA25140AAB103Dual 8 Control box core(import)Match against the unit nameplate
JAA25140AAC102 / AAD106 / AAD126 / AAF122Hall call display board (double deck)Otis early models
JAA25140AAD102ShowMatch against the unit nameplate
JAA25140AAD122Double 8 Outside single staircase hall display(import)Match against the unit nameplate
JAA25140AAF102Single 8 outside staircase hall display(import)Match against the unit nameplate
JAA25140AAF122Dual 8 outside staircase hall display(import)Match against the unit nameplate
LMBS640 / STN640In-car LCD displayOtis premium car interiors
NAA20320AAA00DisplayMatch against the unit nameplate
OTIS-40buttonMatch against the unit nameplate
RBI SensorRBI sensorAll Otis models
TAA177AH1Limited SiwthMatch against the unit nameplate
TAA177AH2Limited SiwthMatch against the unit nameplate
Travel CableTravelling cableAll Otis models
UPS / Backup BatteryControl power UPS / backup batteryAll Otis elevator models
XAA / HAA24270AP6 / 12 / 13 / 16Load weighing deviceAll Otis models
XAA175BL1CEDES optical screen lineMatch against the unit nameplate
XAA177A1Levelling switch LX2-411/412/413/414Xizi Otis
XAA177AP1Power switch LX29Match against the unit nameplate
XAA177AS1Bitable magnetic switch KCB (XAA661G1)Match against the unit nameplate
XAA177AS1 (XAA661G1)Bi-stable magnetic switchAll Otis models
XAA177AZ1PhotoelectricityB4Match against the unit nameplate
XAA177AZ2PhotoelectricityE4(E3S-GS3E4)Match against the unit nameplate
XAA177AZ3.AZ4Photo electricity CEDESMatch against the unit nameplate
XAA177AZ5Escalator photo electricityMatch against the unit nameplate
XAA177BC1Car door power switch BD1Match against the unit nameplate
XAA177BE1Limit switchXizi Otis
XAA177BH1Power switch UKSMatch against the unit nameplate
XAA177BL1Safety tongs switch (TAA177AH)Match against the unit nameplate
XAA177BL5Power switch UKTMatch against the unit nameplate
XAA177BN6Pit power switch 1BMatch against the unit nameplate
XAA177BV1Power switch Z-15G-BMatch against the unit nameplate
XAA177BV2Power switch Z-15GQ22-BMatch against the unit nameplate
XAA177CB1Power switch PB78Match against the unit nameplate
XAA177CP1Power switch Z-15GWZ-BMatch against the unit nameplate
XAA177CT1Ultra high pressure protection switchMatch against the unit nameplate
XAA177DA1EL-1375 limit / power switchAll Otis models
XAA177DB1Photo electricity(SSGD1-L normal closed)Match against the unit nameplate
XAA177DH1StepMatch against the unit nameplate
XAA177EC1EL1376 power switchAll Otis models
XAA177T1Power switch(six pin)Match against the unit nameplate
XAA23500AE3Call box (house stair top tier single button BR23)Match against the unit nameplate
XAA23500AE5Call box (house stair middle tier dual button BR23)Match against the unit nameplate
XAA23500D5Call box(horizontal type display dual 8)Match against the unit nameplate
XAA23500D9XAA23500D9Match against the unit nameplate
XAA23500GC9Call box(XHW middle)XHW
XAA23500R2HPB call boxMatch against the unit nameplate
XAA23500S2HPB call boxMatch against the unit nameplate
XAA23500X2HPB call boxMatch against the unit nameplate
XAA23503EF2AArrival lantern / hall indicatorAll Otis models
XAA23550A2 / A3 / A4 / A5Hall call display board (slim 2-in-1)Otis modernisation market
XAA23550B1 / B3 / B4Hall call display board (3-in-1)Otis modernisation market
XAA23550B1.B2Single 8 dual 8 group control display board(three in one)Match against the unit nameplate
XAA24274B1To weigh system ZCW-2000+Match against the unit nameplate
XAA24275B1To weigh system DZKDD-1X-W35Match against the unit nameplate
XAA25140AAA002Single 8 horizontal type display 21VF21VF
XAA25140AAA022Dual 8 horizontal type display 21VF21VF
XAA25140AAD022Dual 8 single stair outside hall display 21VF21VF
XAA25140AAF002Single 8 group control outside hall 21VF21VF
XAA25140AAF022Dual 8 group control outside hall display 21VF21VF
XAA25140AB1Single 8 maneuvering box display(three in one)Match against the unit nameplate
XAA25140AB2Dual 8 maneuvering box display(three in one)Match against the unit nameplate
XAA25140AC1Screen show ELD(8.4inch inside car)Match against the unit nameplate
XAA25140AC1 / AC28.4" displayXizi Otis
XAA25140AC2Screen show ELD(8.4inch outside the hall)Match against the unit nameplate
XAA25140E36.4" displayXizi Otis
XAA25140G1LCD SHOW 5.4 inchMatch against the unit nameplate
XAA25140K1Car display dual 8Match against the unit nameplate
XAA25140L1Outside hall display dual 8Match against the unit nameplate
XAA25140V1Single stair single 8 displayMatch against the unit nameplate
XAA25140V2Single stair dual 8 displayMatch against the unit nameplate
XAA25302C2HDZ-200D4Match against the unit nameplate
XAA25303A1HDZ-3001 1 by 1 mainframeMatch against the unit nameplate
XAA25305A11 by 1 mainframe HDZ-4001Match against the unit nameplate
XAA25305A21 by 5 mainframe HDZ-4005(5set)Match against the unit nameplate
XAA269F3E311 outside the hall passing chime bottom stateMatch against the unit nameplate
XAA311F1Electric bell 220VMatch against the unit nameplate
XAA311F2Electric bell DC12VMatch against the unit nameplate
XAA311G1Passing chime 21VF21VF
XAA311H1Passing chime XVFMatch against the unit nameplate
XAA323AA1SealMatch against the unit nameplate
XAA323AC2Transform power switch(car top)Match against the unit nameplate
XAA323AF6Three open one closed transform power switchMatch against the unit nameplate
XAA323AK1ButtonMatch against the unit nameplate
XAA323BE1ABR27 button number characterMatch against the unit nameplate
XAA323BQ1BR27 Without the bottom box buttonMatch against the unit nameplate
XAA323D1BR27 Press the elliptical character sheet (hair line) /D2Match against the unit nameplate
XAA323D2Keypad (mirror face With Braille)Match against the unit nameplate
XAA323G4Button BR23Match against the unit nameplate
XAA323K1Control box read small buttonMatch against the unit nameplate
XAA323L1BR27 hair line stainless steel buttonMatch against the unit nameplate
XAA323L2Import BR27 button (mirror face stainless steel)Match against the unit nameplate
XAA323N1Button BR34AMatch against the unit nameplate
XAA323P1BS34 button(First letter)Match against the unit nameplate
XAA323Q1Import BR36 button (hair line stainless steel)Match against the unit nameplate
XAA323Q2Import BR36 button(mirror face stainless steel)Match against the unit nameplate
XAA323Q3Import BR36 button (titanium)Match against the unit nameplate
XAA323S1CButton BR27(Home made)Match against the unit nameplate
XAA386AXTRope hand(to weigh system)Match against the unit nameplate
XAA417E2Ring-shaped strip lampMatch against the unit nameplate
XAA417K1Light bulb 24V1WMatch against the unit nameplate
XAA608E1Photo electricity sensorMatch against the unit nameplate
XAA608E2PhotoelectricityCRD-300N(escalator)Match against the unit nameplate
XAA610AE2Serial interface board using for maneuvering boxMatch against the unit nameplate
XAA610H1LCD SHOW 5.4 inch decoding deckMatch against the unit nameplate
XAA731A1Buzzer 21VF21VF
XAA731C1Buzzer 24VMatch against the unit nameplate
XAT999A34Maneuvering box cranberry glassMatch against the unit nameplate
XAT999A40Button BR54Match against the unit nameplate
XBA177BN2Pit power switch 1AMatch against the unit nameplate
XBA24590G2Optical sensor E3JK-5M2Match against the unit nameplate
XBA24830D1Car top check box STAR OH5000 FOVF (XAA24831A4)OH5000
XBA24830D2Car top check box 21VF21VF
XBA24830D3Car top check box MCS220MMCS
XBA24830D4Car top check box MCS321MCS
XBA24830D5Car top check box HOME-LIFTMatch against the unit nameplate
XBA24830G1Car top check box XHWXHW
XBA24830G3Car top check box FO goods elevatorMatch against the unit nameplate
XBA25140AED999 / A3N2308904.3" LCD displayOtis / Xizi Otis
ZR231SWITCH LX2-412 () XIZI OTIS escalator partsXizi Otis
—Magnet Switch PNPMatch against the unit nameplate
—Limited Switch S3-B1370Match against the unit nameplate
—Limited Switch LX26-111BMatch against the unit nameplate
—Button glow FAA 25090 K121Match against the unit nameplate
—OTIS 506 over speed sensor506
—16VEC near the power switchMatch against the unit nameplate
—Pitch button(OH5100)510 / OH5100
—A313 buttonMatch against the unit nameplate
—BR34 button characterMatch against the unit nameplate
—BS34 button characterMatch against the unit nameplate
—411 car displayMatch against the unit nameplate
—No bottom box dual eight displayMatch against the unit nameplate
—No bottom box single eight displayMatch against the unit nameplate

164Escalator Mechanics

Steps, step chains, sprockets, rollers, comb plates, floor plates, handrail drive wheels, guide strips, skirt brushes and demarcation strips for Otis 506 / 506NCE / NEXTSTEP / 510 / 520 and moving walks.

What these parts do

Carries passengers and transmits drive torque: the step band, handrail circuit, landing comb engagement and all running rollers.

Common failure symptoms

Chain elongation beyond limit, seized or out-of-round rollers, broken comb teeth, cracked or slipping handrail, step cracks, abnormal noise.

Repair & replacement guide

1) Replace steps with any visible crack immediately — do not repair by welding. 2) Replace chains as a complete set and re-tension. 3) Reset comb-to-step clearance after any comb or step change. 4) Verify handrail speed synchronisation with the step band after drive-wheel work.

Maintenance & replacement tips

Heavy-duty and standard rollers use different bearings (6206 vs 6204) — confirm before ordering. Inspect comb teeth and step rollers at every service visit. Skirt brushes and demarcation strips are consumables; keep them in stock.

Part No.DescriptionApplication / Unit
100mm / XAA295CZ / XAA296CZHeavy-duty step roller510 / 520 heavy duty
16B-2Handrail drive chainMatch against the unit nameplate
17-Section Handrail Reversing Chain / GO456AY1Handrail return chain506 / 506NCE
20A-2Main drive chain506
506NECHandrail drive chain506
54-GAA26150E / GBA26150AC18 / GAA26150XEscalator step chain506 / 506NCE / NEXTSTEP / 508
56-GO453D-NSAAComb segment (replacement)506 / Trav-O-Lator
56-YX9701EKUnder-step lighting / comb lighting506 Slimline
56-YX9703HH / HJUpper & lower comb plate and floor plate506 Slimline
76mm / 82mm Moving Rubber HandrailRubber handrail506 / 506NCE (custom width & length)
AGY315015KW Inverter (escalator) XAA622Q2Match against the unit nameplate
B8669B1Tensioning deviceMatch against the unit nameplate
CN023435364Demarcation stripMatch against the unit nameplate
DAA26202A4Lower landing control panel506 series
DAA265NNN1Friction wheelMatch against the unit nameplate
ESC.506Comb plate506
FAA26140A6Step506
FAA717A1Multi-rib (PK) beltMatch against the unit nameplate
FX453YComb plateMatch against the unit nameplate
G02215W8Comb plateMatch against the unit nameplate
G0453D1Comb plateMatch against the unit nameplate
G0453D2Comb plateMatch against the unit nameplate
G0453D3Comb plateMatch against the unit nameplate
G0453D4Comb plateMatch against the unit nameplate
G0453D5Comb plateMatch against the unit nameplate
G0453D6Comb plateMatch against the unit nameplate
G0453D7Comb plateMatch against the unit nameplate
G0457BF11Comb plateMatch against the unit nameplate
G0457BF12Comb plateMatch against the unit nameplate
G0A453A1Comb plateMatch against the unit nameplate
G0A453A4Comb plateMatch against the unit nameplate
G0A453A5Comb plateMatch against the unit nameplate
G0A453A6Comb plateMatch against the unit nameplate
G0A453A9Comb plateMatch against the unit nameplate
G0A453AG1Comb plateTrav-O-Lator
G0A453AG10Comb plateTrav-O-Lator
G0A453AG11Comb plateTrav-O-Lator
G0A453AG12Comb plateTrav-O-Lator
G0A453AG4Comb plateTrav-O-Lator
G0A453AG9Comb plateTrav-O-Lator
GA290AJ1176.2 x 22 mmMatch against the unit nameplate
GAA195NV1Sprocket506
GAA20401B507Brake arm506 series
GAA21640StepMatch against the unit nameplate
GAA26140StepMatch against the unit nameplate
GAA26140F / GAA26140K / GAA26140M381Escalator step506 / 506NCE (1000 mm, GAA26140M381) / NEXTSTEP
GAA26180D2HandrailMatch against the unit nameplate
GAA265AL2Friction wheel506 series
GAA265AP1Handrail pulley506 series
GAA265AT1Friction wheel606NCT
GAA265NNN1GAA265NNN1Match against the unit nameplate
GAA27078K72GAA27078K72Match against the unit nameplate
GAA27078K78GAA27078K78Match against the unit nameplate
GAA27078K83Bottom guide balustrade Otis 506NCE506NCE / 506
GAA290CB2Step rollerMatch against the unit nameplate
GAA290CF2Step roller (Ø76.2×22, 6203-RS)506 / 506NCE (supersedes 290BP4 / GO290AJ9)
GAA332Z3Chain606NCT
GAA332Z4Handrail tension chain506NCE
GAA384JY1Handrail inlet coverMatch against the unit nameplate
GAA384JY2Handrail inlet coverMatch against the unit nameplate
GAA384JY3Handrail inlet coverMatch against the unit nameplate
GAA384JY4Handrail inlet coverMatch against the unit nameplate
GAA384JY5Handrail inlet coverMatch against the unit nameplate
GAA453BMAluminium comb plate506NCE and others
GAA453BM1Comb plateMatch against the unit nameplate
GAA453BM10Comb plateMatch against the unit nameplate
GAA453BM11Comb plateMatch against the unit nameplate
GAA453BM12Comb plateMatch against the unit nameplate
GAA453BM13Comb plateMatch against the unit nameplate
GAA453BM14Comb plateMatch against the unit nameplate
GAA453BM15Comb plateMatch against the unit nameplate
GAA453BM16Comb plateMatch against the unit nameplate
GAA453BM2Comb plateMatch against the unit nameplate
GAA453BM3Comb plateMatch against the unit nameplate
GAA453BM5Comb plateMatch against the unit nameplate
GAA453BM6Comb plateMatch against the unit nameplate
GAA453BM7Comb plateMatch against the unit nameplate
GAA453BM8Comb plateMatch against the unit nameplate
GAA453BM9Comb plateMatch against the unit nameplate
GAA453BV1Comb plateMatch against the unit nameplate
GAA453BV41Comb plateMatch against the unit nameplate
GAA453BV5Comb plateMatch against the unit nameplate
GAA453BV51Comb plateMatch against the unit nameplate
GAA453BV55Comb plateMatch against the unit nameplate
GAA453BV56Comb plateMatch against the unit nameplate
GAA453BV6Comb plateMatch against the unit nameplate
GAA453BV7Comb plateMatch against the unit nameplate
GAA453CH1Comb plateNEXTSTEP
GAA453CV1Comb plateNEXTSTEP
GAA453CV2Comb plateNEXTSTEP
GAA456CX1Handrail rollerOtis escalators
GAA50AHA1Handrail guide stripMatch against the unit nameplate
GAA717N1V-beltMatch against the unit nameplate
GAB384NYHandrail inlet coverMatch against the unit nameplate
GAB438BNX1Handrail inlet plateMatch against the unit nameplate
GAB438BNX2Handrail inlet plateMatch against the unit nameplate
GCA717D1Handrail drive V-belt506NCE
GO2215A2StepMatch against the unit nameplate
GO2215AB20Sprocket506
GO2215AB7BeltMatch against the unit nameplate
GO2215H13Main drive shaft bearing506 series
GO2215P4Handrail end rollerMatch against the unit nameplate
GO265AHFriction wheel510
GO322P100Handrail drive chainMatch against the unit nameplate
GO332P12ChainMatch against the unit nameplate
GO332P13ChainMatch against the unit nameplate
GO385EP1Tensioning housing506
GO455G1Step demarcation stripMatch against the unit nameplate
GO456AY1PIN RollerMatch against the unit nameplate
GO465BA1Roller PINMatch against the unit nameplate
GOA453AGComb plateMatch against the unit nameplate
GOA454AGComb plateMatch against the unit nameplate
GOA455AGComb plateMatch against the unit nameplate
GXF0290AR502Step506
L47332091ADemarcation stripMatch against the unit nameplate
L48034047ADemarcation stripXizi Otis
L48034047BDemarcation stripXizi Otis
L48034049ADemarcation stripXizi Otis
LDTJ-B-1Comb plateMatch against the unit nameplate
LDTJ-B-2Comb plateMatch against the unit nameplate
LDTJ-B-3Comb plateMatch against the unit nameplate
LL28034032Demarcation stripMatch against the unit nameplate
LL8034023Demarcation stripMatch against the unit nameplate
POV71AAA1V-belt606NCT
XAA195DP02Escalator sprocket506 series
XAA26340H3StepXizi Otis
XAA290CY1Step rollerMatch against the unit nameplate
XAA290CZ / XAA290CZ1Handrail rollerXizi Otis
XAA291AAStep rollerXizi Otis
XAA291AB / XAA295CZStep chain rollerXizi Otis / heavy duty
XAA292AAComb plate (segmented)Xizi Otis
XAA293AASkirt brush (per metre)All Otis escalators
XAA294AA / DAA261NNN1Handrail drive wheel assembly506NCE and others
XAA310YE1Shockproof piece(escalator enter)Match against the unit nameplate
XAA384KP1Handrail inlet / outlet506 series
XAA402TT8Handrail guide rail508-XO
XAA453AV1Comb plateMatch against the unit nameplate
XAA453AV2Comb plateMatch against the unit nameplate
XAA453AV3Comb plateMatch against the unit nameplate
XAA455BF6 / XAA455M1Step demarcation strip (yellow line)506 / 506NCE
XAA455K1Demarcation stripXizi Otis
XAA455N1Demarcation stripXizi Otis
XAA455QDemarcation stripMatch against the unit nameplate
XAA455R1Demarcation stripMatch against the unit nameplate
XAA622Q1AGY11KW Inverter(escalator)Match against the unit nameplate
XJ1200StepMatch against the unit nameplate
XXA453BJComb plateMatch against the unit nameplate
—Drive chain506
—Handrail inletMatch against the unit nameplate
—Handrail inletMatch against the unit nameplate
—V-belt506NCE / 506
—V-belt506
—V-belt510
—Comb plateMatch against the unit nameplate
—Handrail support chain506NCE / 506
—Handrail support chain506NCE / 506
—Handrail support chain506NCE / 506
—HandrailMatch against the unit nameplate
—HandrailMatch against the unit nameplate
—Main drive chainMatch against the unit nameplate
—ChainMatch against the unit nameplate
—Handrail drive chain506
—Main drive chain506
—Escalator synthetic glassMatch against the unit nameplate

85Electrical Components

Contactors, relays, transformers, filters, resistors, capacitors, terminals and power supplies used inside Otis control cabinets.

What these parts do

Power conversion, circuit switching, surge absorption, current limiting and signal isolation inside the controller.

Common failure symptoms

Contact erosion or welding, burnt coils, bulged capacitors, thermal cracking, parameter drift.

Repair & replacement guide

1) Check the load side for a short before replacing. 2) Measure coil resistance and contact resistance. 3) Replace with identical specification — watch coil voltage (AC vs DC) and contact rating. 4) Run under load and monitor temperature rise afterwards.

Maintenance & replacement tips

Inspect contacts and terminal temperature every quarter. Electrolytic capacitors: bulk preventive replacement at 8–10 years. Always confirm the coil voltage class when ordering spares.

Part No.DescriptionApplication / Unit
150DY-2HTransistor QMMatch against the unit nameplate
150Q2YS40Transistor MGMatch against the unit nameplate
75Q2YS40Transistor MGMatch against the unit nameplate
AC110VContact SC-N2 XAA638S1Match against the unit nameplate
AC110V-2K2BFuji SH-4 contactMatch against the unit nameplate
AC110V-35AFuji SC-N2 contactMatch against the unit nameplate
AC110V-3K1BFuji SH-4 contactMatch against the unit nameplate
AC110V-4KFuji SH-4 contactMatch against the unit nameplate
AC110V-65AFuji SC-N3 contactMatch against the unit nameplate
AC110V-80AFuji SC-N4 contactMatch against the unit nameplate
AC122Transformer(TDB-800-06) 380= AC72Match against the unit nameplate
AC220VSC-03 relay 3 open 1 closedMatch against the unit nameplate
AC220V-2K2BFuji SH-4/G contactMatch against the unit nameplate
AC31VRectifier bridge =DC28VMatch against the unit nameplate
AFA26800UD2Inverter PCB Control Type OTIS 3000B Rectifier ACA21290BA4Match against the unit nameplate
AZ14-1Door Contact KDLMatch against the unit nameplate
DC105VTransformer 220=Match against the unit nameplate
DC110VRelay LY2 XAA613Q1Match against the unit nameplate
DC110V-2K2BFuji SH-4 contactMatch against the unit nameplate
DC165Transformer(TDB-1020-01) 400=*2Match against the unit nameplate
DC24VLG relay (2 open 2 closed)Match against the unit nameplate
DC24V-2K2BFuji SH-4 contactMatch against the unit nameplate
FAA156AX1Contact motherMatch against the unit nameplate
FAA628H1Battery ChargerMatch against the unit nameplate
FO156CK3Contact father shuntMatch against the unit nameplate
GAA225LL1TransformerMatch against the unit nameplate
GAA225MR1TransformerMatch against the unit nameplate
GAA375AFFuse 1,6Match against the unit nameplate
GAA375BY4Fuse 4AMatch against the unit nameplate
GHA21270A1RCB II Plug UPMatch against the unit nameplate
GHA21270A2RCB II Plug OUTMatch against the unit nameplate
TO-40-JO610GJ N62P20105(with 5 pieces Long capacitance)Match against the unit nameplate
XAA156F1Auxiliary contact AU-2(1 open 1 closed)Match against the unit nameplate
XAA156J1AU-4 contactMatch against the unit nameplate
XAA156K1Secondary contact SZ-A20Match against the unit nameplate
XAA156K2Secondary contact SZ-A22Match against the unit nameplate
XAA156P1Assist contact AU-1Match against the unit nameplate
XAA21305A41KW 80 Ohm resistance boxMatch against the unit nameplate
XAA21305A5Trig resistance box 1500W 100 ohm(2 pieces parallel connection)Match against the unit nameplate
XAA21305C1Trig resistance box 1500W 20 ohm(4 pieces parallel connection)Match against the unit nameplate
XAA21305C7Trig resistance box 1200W 28 ohmMatch against the unit nameplate
XAA21305D1Trig resistance box 2000W 11.6 ohmMatch against the unit nameplate
XAA225AC1Transformer() 400=DC110 AC24*2Match against the unit nameplate
XAA225AG3Transformer ACVV380/220Match against the unit nameplate
XAA225AJ1Transformer AT25Match against the unit nameplate
XAA225AM2Transformer() 400=DC110 2.5A/AC110V/AC24VMatch against the unit nameplate
XAA225AQ1Transformer() 400=DC28/10A AC24/15A AC110/5AMatch against the unit nameplate
XAA225AS1Transformer(/AS2) 400=DC28/10A AC24/9A AC110/5AMatch against the unit nameplate
XAA225AS2Transformer 5100510
XAA225BA1Transformer() 400=DC110 AC24 AC110Match against the unit nameplate
XAA225BF6Transformer() 400=DC28/10A AC24/9A AC110/5A AC220Match against the unit nameplate
XAA225P1Transformer TDE-101(36V)Match against the unit nameplate
XAA225P2Transformer TDE-102Match against the unit nameplate
XAA225P4Transformer (goods elevator TDE-142)Match against the unit nameplate
XAA225R1Transformer TDE-521Match against the unit nameplate
XAA232AV2Resistance piece 2.80 ohmMatch against the unit nameplate
XAA232D1Resistance piece 1.95 ohmMatch against the unit nameplate
XAA232W2Trig resistance 1000W 100 ohmMatch against the unit nameplate
XAA232Y2Trig resistance 1500W 3 ohmMatch against the unit nameplate
XAA276C3Absorb the unit SZ/Z5Match against the unit nameplate
XAA605A1Electron arc suppressorMatch against the unit nameplate
XAA613AN1Permanent magnet relayMatch against the unit nameplate
XAA613AR1Hot protectorMatch against the unit nameplate
XAA613AT2Phase sequence encoder ABJ1-122Match against the unit nameplate
XAA613P3Time relay H3R DC24V without baseMatch against the unit nameplate
XAA613S5Relay MY4Z 24VDC japanMatch against the unit nameplate
XAA617B10140W 22 ohm resistanceMatch against the unit nameplate
XAA617B11140W 320 ohm resistanceMatch against the unit nameplate
XAA617D1Pressure-sensitive resistanceMatch against the unit nameplate
XAA618AB24 hole oblate plugMatch against the unit nameplate
XAA618AV1Time relayBase H3CRMatch against the unit nameplate
XAA618D1Relay Base MM4XPMatch against the unit nameplate
XAA618G1Relay Base LY4Match against the unit nameplate
XAA618H2Relay Base MY4Match against the unit nameplate
XAA621M1Lithium battery 200HBAT09Match against the unit nameplate
XAA621N1Lithium battery 3G2A9Match against the unit nameplate
XAA630J1Calculagraph HLTC220VMatch against the unit nameplate
XAA638S4Relay SC-4-1Match against the unit nameplate
XAA638S6Contact SC-5NMatch against the unit nameplate
XAA737B1Filter screenMatch against the unit nameplate
—B module SKD 62/16Match against the unit nameplate
—B module SKD 82/16Match against the unit nameplate
—Transistor MG 150 YS40Match against the unit nameplate
—Transistor MG50Q6ES40Match against the unit nameplate
—Single phase power Filters HL-06DMatch against the unit nameplate

71Traction & Guidance

Traction sheaves, encoders, wire rope, composite steel belts, guide shoes, deflector sheaves, couplings, compensation chains and belt monitoring devices.

What these parts do

Suspension, traction, position feedback and rail guidance — the parts that decide ride comfort and landing accuracy.

Common failure symptoms

Wear, noise, position drift, broken wires or cracked belt coating, loss of braking force.

Repair & replacement guide

1) Check encoder shielding and coupling. 2) Re-run position calibration or inverter auto-tuning after replacement. 3) Replace ropes or belts as a complete set per the discard criteria. 4) Re-adjust tension after any sheave change.

Maintenance & replacement tips

Wire ropes and composite steel belts must always be replaced as a full set. Route encoder cables separately from power cables. Replace seized guide-shoe bearings at once to avoid scoring the rails.

Part No.DescriptionApplication / Unit
633B1Coder FAA FOR DO 2000Match against the unit nameplate
A633D1A411 coderMatch against the unit nameplate
AAA633L118ATF Machine Encoder Chinese type replaced 3 ways18ATF
AAA633V1Absolute position encoderOtis Gen2 / self-learn-free system
AAA633W1EncoderAll Otis models
AAA633Z1CoderMatch against the unit nameplate
AAA633Z21Incremental encoderAll Otis models
AAA659C3A411 coderMatch against the unit nameplate
AAA717R1BeltGen2
AAA717W1BeltGen2
ABA215BX2Plastic speed measuring jointMatch against the unit nameplate
ABA633L1A311 coderMatch against the unit nameplate
ABA633Z1GEN2 coderGen2
ABA633Z21GEN2 coderGen2
Brake Lining / Brake ShoeBrake shoe / liningOtis traction machines
Coated Steel Belt (CSB)Gen2 flat composite steel beltOtis Gen2
Compensation ChainCompensation chainOtis high-rise elevators
DAA24160G1Car-side guide shoeAll Otis models
DAA633A1Encoder TAA633A1Match against the unit nameplate
Deflector / Diverting SheaveDiverting / deflector sheaveAll Otis models
EC2-7ElastomericMatch against the unit nameplate
FAA380F500Guide shoe liner (20×25.5×8 mm)All Otis models
FAA712X21Air cord OP900Match against the unit nameplate
FBA24270AA1LwdeMatch against the unit nameplate
GAA20401T621EC2-7main encoderMatch against the unit nameplate
GAA265AHFriction wheelMatch against the unit nameplate
GAA27078K36Guide RailMatch against the unit nameplate
GAA27078K4Guide RailMatch against the unit nameplate
GAA385GX1BeltMatch against the unit nameplate
GCA402BP1Backspace guide railMatch against the unit nameplate
Governor RopeGovernor ropeAll Otis models
JAA00633ABF003ENCODER for OVF20 JAPANESE TYPE REPLACEOVF20
KAA24180A1 / A2Roller guide shoeOtis high-speed elevators
Oil Cup / LubricatorGuide rail oil cup / lubricator boxAll Otis models
PKT1030A-1024-J3OFEncoder Japanese Type ReplacedMatch against the unit nameplate
RKT1040-1024-C15CEncoderMatch against the unit nameplate
Steel Wire RopeTraction wire ropeAll Otis models
T0290BV113VTR aluminium alloy Disc wheels13VTR
TAA215F3CouplingMatch against the unit nameplate
TAA290B113VTR Disc wheels13VTR
TAA633A1ENCODER for OVF30 JAPANESE TYPE REPLACEOVF30
TAA663A1Encoder OriginMatch against the unit nameplate
XAA20500A1Coder(Italian speed measuring machine)Match against the unit nameplate
XAA237D2Guide shoe 1.75M/SMatch against the unit nameplate
XAA237EZ1 / EZ3 / EZ4Sliding guide shoeAll Otis models
XAA237F1Rocker die(whole plastic)Match against the unit nameplate
XAA237J1GEN2 car guide shoeGen2
XAA24161A1Guide shoe(with the metallic reed)Match against the unit nameplate
XAA24161B1Guide shoe(Mitsubishi)Match against the unit nameplate
XAA24180A1GEN2 roller guide shoe(No three Angle board)Gen2
XAA24180A2GEN2 roller guide shoe(with three Angle board)Gen2
XAA256J3Shoe guide 220*17 DTJ1501-3Match against the unit nameplate
XAA349C1OilMatch against the unit nameplate
XAA353A116VEC Disc wheelsMatch against the unit nameplate
XAA380G1Shoe guide 120*17Match against the unit nameplate
XAA380K1Roller guide shoe guideMatch against the unit nameplate
XAA380N1Shoe guide(Mitsubishi 120*16)Match against the unit nameplate
XAA380N2Shoe guide(mitsubishi 120*10)Match against the unit nameplate
XAA417N1Anti-riot light(Light plane ship)Match against the unit nameplate
XAA431AB1Triangulation keyMatch against the unit nameplate
XAA431AB3Unloading rodMatch against the unit nameplate
XAA456K1Roller guide shoeMatch against the unit nameplate
XAA633AA1Gearless coder(1387style)Match against the unit nameplate
XAA648D1Alloy speed measuring jointMatch against the unit nameplate
XWP243C2Guide shoe inside shoe lining XAA237DMatch against the unit nameplate
—GUIDE SHOE ROLLER 95mmMatch against the unit nameplate
—GUIDE SHOE ROLLER 125mmMatch against the unit nameplate
—GUIDE SHOE ROLLER 200mmMatch against the unit nameplate
—GUIDE SHOE ROLLER 200mm 2RSMatch against the unit nameplate
—160VAT TRACTION WHEEL 575*5*10mm160VAT
—Elastomeric EC-SWMatch against the unit nameplate

35Escalator Electrics

ECB / ECB-II main boards, safety-circuit switches, interlocks, brake magnets, key switches, sensors and stop buttons for Otis escalators and moving walks.

What these parts do

Start/stop logic, the safety circuit, every protection switch and brake control of the escalator.

Common failure symptoms

Will not start, safety-circuit fault reported, switch sticks and does not operate, braking distance increases.

Repair & replacement guide

1) Test each safety-circuit switch individually before replacing a board. 2) Check the 24 V supply and terminating resistors. 3) Record DIP switch and jumper positions before board swap. 4) Verify with empty and full-load brake tests afterwards.

Maintenance & replacement tips

Test the emergency stop monthly. Test cover plate, comb, skirt and handrail inlet switches at every service visit. Measure and log braking distance quarterly.

Part No.DescriptionApplication / Unit
2108P20CInterlock switch XCX NMatch against the unit nameplate
55-YX9703JLHandrail inlet guard and switch506 Slimline
57-GO308HLEmergency stop button and alarm device506NCE (ASME A17.1)
Comb Light / Traffic LightComb lighting / traffic light506 series
Contactor / RelayContactors and relays506 series
CPM2B-60CDR-DCH-CPUControl PCB XIZI OTIS escalator partsXizi Otis
DAA177CD1 / LW42A1Y-4736/OF302Key switch (cam switch)506 series
DAA177DJ1Cam switch506 series
DAA177FR1Limit switch506 series
DAA234J1 / GSD100K2FSBrake magnet506 series
DAA608J3 / ND8-S3-M12SInductive sensor506NCE
EAA5393A006Transformer & control box kit506 series
GAA177FD2Interlock switchMatch against the unit nameplate
GAA177FE1Limit switch506NCE
GAA177FW1Interlock switchMatch against the unit nameplate
GAA177GF1Interlock switchMatch against the unit nameplate
GAA177GZ1 / FP-A1 PNP 5MPressure sensor506 series
GAA177HL1Interlock switchMatch against the unit nameplate
GAA177HL2Interlock switchMatch against the unit nameplate
GAA177HR1 / CA4Key switch CA4506 series
GAA26800AR2506NCE Main Board506NCE / 506
GAA26800AR2 / AR1ECB main control board506 series
GAA346PL1HandrailMatch against the unit nameplate
GBA1776Y1Interlock switchMatch against the unit nameplate
GBA177FG1Brake unitMatch against the unit nameplate
GBA177HA3 / HA1Safety / limit switch506NCE
GBA177HK1Interlock switchMatch against the unit nameplate
GDA26800AY1 / GCA26800AY1ECB-II main control board506NCE / 508NCE
GGA26800LJ2Escalator control board506 series
GOA177BX4Interlock switchMatch against the unit nameplate
MAA177E3Proximity switch506 series
XAA177HP1 / QM177GY1-201Limit switchXizi Otis
XAA616Z1Escalator microcomputer board(CPM2B)Match against the unit nameplate
XCXN2108P20CInterlock switchMatch against the unit nameplate
—506NCE Main Board Chip506NCE / 506

33Safety Components

Overspeed governors, progressive safety gears, buffers, rope grippers (ascending overspeed protection), governor ropes and safety switches — all statutory safety devices.

What these parts do

Forms the safety circuit and forces a stop under overspeed, free fall, overtravel or unintended car movement.

Common failure symptoms

Device does not reset after operation, worn wedges or contacts, insufficient braking force, nuisance stops.

Repair & replacement guide

1) Perform the statutory periodic function test — this is not optional. 2) Any device that has operated must be dismantled and inspected together with the guide rails and ropes. 3) Verify with no-load or loaded test after replacement. 4) Set clearances and torque to the nameplate values.

Maintenance & replacement tips

Never bridge the safety circuit. Governors must be re-calibrated periodically with records kept. Measure brake gap and braking force quarterly. Replace immediately on any crack or wear beyond limit.

Part No.DescriptionApplication / Unit
A9672D201Safety tong(used GEN2)Gen2
A9672E19Safety tong(import)Match against the unit nameplate
AAA20780P45-groove composite belt sheave assemblyOtis Gen2
AAA649J2 / AAA649J12Steel belt test probeOtis Gen2
ABA21700AG9-16Composite steel belt monitoring deviceOtis Gen2
BA610AAW1BA610AAW1Match against the unit nameplate
CSA00C021ABrake unitMatch against the unit nameplate
DAA22550A2 / YH72B/175Hydraulic bufferRated speed ≤1.6 m/s, stroke 175 mm, P+Q 600~3500 kg
DAA24120A28HN6000 safety gearP+Q 2600~2800kg
DAA24120B11302 / B11402 / B11502HN6000C safety gearHeavy-duty passenger / freight elevators
DAA24120H249 / H250PS35S progressive safety gearP+Q 2325~2600 kg, 0.63~2.5 m/s, rail width 15.88 mm
DAA330K1Brake unitOtis traction machines
FAA320BB1Buffer(used GEN2)Gen2
FAA320R4Buffer GEN2-R2-1600KG/1.75M/SGen2
G0222P1Brake unit506
GAA20401F550Brake unitMatch against the unit nameplate
GBA21295H2Brake unitMatch against the unit nameplate
JY416AT2Brake unit17CT
KAA24120AAH133 / 134PS35A progressive safety gearP+Q 2101~2300 kg, 0.63~1.75 m/s, rail width 10 mm
Overspeed Governor (AAA177 / XAA177 Ser.)Overspeed governor assemblySelect by nameplate rated speed
Pit Buffer SwitchBuffer switchAll Otis elevator models
Rope Brake / ACBAscending overspeed protection device (rope gripper)Select by unit configuration
TA20602A361Speed limited(used GEN2)Gen2
TAA20222BE2Brake unitMatch against the unit nameplate
TAA20602B41Speed limited(import)Match against the unit nameplate
TAA416P2Brake unit13VTR / 16VAT
TAB416P2Brake unit140VAT
TAB486G1Brake unit18ATF
XAA177AH1 / AH2Governor electrical switchAll Otis models
XAA177BL1 (TAA177AH)Safety gear switchAll Otis models
XAA610AT1Reset layer safety circuit board(5000.5100)510
XHW151B1Brake unitXHW
—Brake unitMatch against the unit nameplate

23Communication & Emergency

Five-party intercom systems (HDZ series), emergency power supplies, alarm devices, backup batteries and rescue control boards.

What these parts do

Intercom, emergency power and alarm functions used for trapped-passenger rescue.

Common failure symptoms

Flat battery, noisy audio, host unit not responding, no rescue operation after power failure.

Repair & replacement guide

1) Measure battery voltage and capacity. 2) Carry out a real call test and a power-failure test every month. 3) Verify a full end-to-end call after any replacement.

Maintenance & replacement tips

Replace batteries as a complete set every 2–3 years. Run and record an emergency call drill every quarter. Strip and inspect any sub-unit that has taken water.

Part No.DescriptionApplication / Unit
DAA718A1Emergency power supply and alarm box GEN2 usingGen2
FAA512AC8Porter Intercom Unit FAA512V1Match against the unit nameplate
XAA147AQ1Fire-fighting synthetic glassMatch against the unit nameplate
XAA25301G1Interphone 934BMatch against the unit nameplate
XAA25301H10GEN2 talkback donkey engine talkbackGen2
XAA25301H11The three of intercom GEN2 mainframeGen2
XAA25301H2GEN2 interphone House to pay the machineGen2
XAA25302A3Interphone mainframe 1 by 1 mainframe 202Match against the unit nameplate
XAA25302A6Five orientations talkback mainframeMatch against the unit nameplate
XAA25302B3Talkback donkey engine talkback HDZ-201FAMatch against the unit nameplate
XAA25302B5Talkback donkey engine talkbackMatch against the unit nameplate
XAA25302B6Five orientations talkbackMatch against the unit nameplate
XAA25302F1Talkback powerMatch against the unit nameplate
XAA25302G1Five orientations talkback power stripMatch against the unit nameplate
XAA25303B1Talkback donkey engine talkback HDZ-3001FMatch against the unit nameplate
XAA25303B2Talkback donkey engine talkback HDZ-300FAMatch against the unit nameplate
XAA25304B2One to others Intercom channel 5050HZMatch against the unit nameplate
XAA25305B1Talkback donkey engine talkback HDZ4001FMatch against the unit nameplate
XAA25305B44001 type talkback donkey engine talkbackMatch against the unit nameplate
XAA25305B5Its top car bottom talkback donkey engine talkbackMatch against the unit nameplate
XAA621J1Emergency supply DC-12VMatch against the unit nameplate
XAT999A22Fireman switch(single ordinary)Match against the unit nameplate
—12V Emergency flat device batteryMatch against the unit nameplate

19Cables & Consumables

Travelling cables, shielded signal cables, connectors, glands, fixing clips and consumable installation materials.

What these parts do

Carries power and signals between car, hoistway and controller.

Common failure symptoms

Broken cores, damaged sheath, shielding failure causing interference, oxidised or loose connectors.

Repair & replacement guide

1) Inspect the bend section under the car floor for wear. 2) Earth the shield at one end only. 3) Route separately from power cables. 4) Replace the whole cable — never patch locally.

Maintenance & replacement tips

Inspect bend sections and fixing clamps every six months. Replace the full cable once the sheath cracks. Never run a damaged cable wrapped in tape.

Part No.DescriptionApplication / Unit
FAA25500S999Retinue cable 22*0.75+2*0.25(GEN2)Gen2
XAA174AB4Cable 32 core(with the screen)Match against the unit nameplate
XAA174D2Surname cable 36 core(without the plug-in)Match against the unit nameplate
XAA174K76 core screening wireMatch against the unit nameplate
XAA174Y1Round cable 7 coreMatch against the unit nameplate
XAA174Y8Cable 39 coreMatch against the unit nameplate
XAA174Z1Cable 9 core multiple twinMatch against the unit nameplate
XAA175AC1Copper core 10 squareMatch against the unit nameplate
XAA175AW15Core light eyelinerMatch against the unit nameplate
XAA175AW22Core light eyelinerMatch against the unit nameplate
XAA175N4Screening wire RVVP9*0.12Match against the unit nameplate
XAA175R2Copper core 1.13Match against the unit nameplate
XAA25140AAB201Single 8 Control box core 21VF21VF
XAA25140AAB202Dual 8 Control box core 21VF21VF
XAA431AB2ChainMatch against the unit nameplate
XAA712E14Hoisting cable(japan import 12.7)Match against the unit nameplate
XAA712X1Heavy steel wire rope M=900MMMatch against the unit nameplate
—Door Wire Rope 4MMMatch against the unit nameplate
—Constantan wire resistanceMatch against the unit nameplate

12Hydraulic Elevator Parts

Hydraulic cylinders, valve blocks, seals, hoses and emergency lowering devices for Otis hydraulic elevators.

What these parts do

Controls lifting, lowering and emergency descent on hydraulic elevators.

Common failure symptoms

Oil leakage, sticking valve spools, excessive settling, emergency lowering failure.

Repair & replacement guide

1) Check oil level and seals first. 2) Clean or replace valve spools. 3) Replace cylinder seals as a complete kit. 4) Run settling and emergency lowering tests after the repair.

Maintenance & replacement tips

Check oil level and oil condition every six months; replace oil immediately if black or contaminated with water. Always fit seals as a complete set.

Part No.DescriptionApplication / Unit
XAA20301A008ValveMatch against the unit nameplate
XAA20301B001ValveMatch against the unit nameplate
XAA20301C003ValveMatch against the unit nameplate
XAA20311B001Old type feedback head (hydraulic ladder)Match against the unit nameplate
XAA20351C001ELAR-1Match against the unit nameplate
XAA20381A018Hydro cylinder objurgating ring BZG-100Match against the unit nameplate
XAA20381A019Hydro cylinder objurgating ring BZG-110Match against the unit nameplate
XAA20381A020Hydro cylinder objurgating ring BZG-120Match against the unit nameplate
XAA20381A021Hydro cylinder objurgating ring BZG-125Match against the unit nameplate
XAA24186A1Hydraulic pressure elevator roller guide shoeMatch against the unit nameplate
XAA386BNL1Oleo-electrical synthetic glassMatch against the unit nameplate
XBA24830G2Car top check box LCBII hydraulic pressureLCB-II

11Tools & Accessories

Service tools, keys, testers, key switches, lubricators and auxiliary items for Otis maintenance work.

What these parts do

Special tools, testers and consumables used during maintenance and repair.

Common failure symptoms

Tool wear, tester out of calibration, lost keys.

Repair & replacement guide

1) Use only tools matched to the specific model. 2) Calibrate testers periodically. 3) Replace a lost key set as a complete kit and re-issue keys.

Maintenance & replacement tips

Inventory van stock every quarter. Replace any spring or plastic part showing deformation or cracks immediately.

Part No.DescriptionApplication / Unit
0H5000wrenchMatch against the unit nameplate
FAA72N1NUTMatch against the unit nameplate
GAA2175051Service ToolMatch against the unit nameplate
GAA21750S2Test Tool GAA21750S1/GAA21750AK3Match against the unit nameplate
GAA27DY1Comb plateTrav-O-Lator
GBA21750S1Service ToolMatch against the unit nameplate
JAA20136AAB001Brake unit140VAT
TAA286AJ1Brake unit18ATF
XAA25302A21 to 5 machine toolsMatch against the unit nameplate
XAA25304A11 to public machine tools HDZ-980AMatch against the unit nameplate
XAA25304A3HDZ-980 public machine toolsMatch against the unit nameplate

14Miscellaneous Spare Parts

Machine-room accessories, covers, labels, brackets and model-specific replacement parts that do not fall into a single system group.

What these parts do

Auxiliary items and host-specific replacements across the whole unit.

Common failure symptoms

Varies by part — usually wear, ageing or loss.

Repair & replacement guide

1) Cross-check the replacement against the original label and photographs. 2) Measure installation dimensions before ordering. 3) Inspect visually and functionally before fitting.

Maintenance & replacement tips

Replace to original specification and never mix different suffix versions. Keep batch stock of parts that go missing easily.

Part No.DescriptionApplication / Unit
369PB1Chick letMatch against the unit nameplate
GAA234AJ1GAA234AJ1Match against the unit nameplate
GAA234AJ2GAA234AJ2Match against the unit nameplate
GAA234AJ4GAA234AJ4Match against the unit nameplate
GAA234AJ5GAA234AJ5Match against the unit nameplate
GAA657A4Match against the unit nameplate
GAA657A1(EMF4)Match against the unit nameplate
—SSGD-1L（NC）Match against the unit nameplate
—Flat beltMatch against the unit nameplate
—Flat beltMatch against the unit nameplate
—Flat beltMatch against the unit nameplate
—Homegrown RSAB-4Match against the unit nameplate
—17CT Host families cover17CT
—Stainless steel with the Braille(-1-9)Match against the unit nameplate

Otis Elevator & Escalator Spare Parts Catalog — visual reference

A part number is only half the identification. The same Otis reference can look different across production runs, which is why we photograph the interface points instead of the label. The four groups below show what the most-ordered families inside this Otis Elevator & Escalator Spare Parts Catalog look like on arrival, so you can compare them with the unit still on site before you commit to an order.

Otis Elevator & Escalator Spare Parts Catalog — control and drive boards
Control & drive systems
233 references · boards, inverters, contactors
Landing door lock and door operator parts for Otis elevators
Door systems
69 references · locks, rollers, operators
Escalator main drive chain listed in the Otis Elevator & Escalator Spare Parts Catalog
Escalator mechanics
164 references · chains, steps, handrails
Governor rope and safety components for Otis traction elevators
Safety & traction
33 safety + 71 traction references

If the unit on site does not match the photograph, send us a picture of the rear face and the harness. Cross-matching by interface is what lets us supply a working replacement when the original Otis reference has been superseded three or four times — see the elevator spare parts range for the wider stock, and contact us with the plate details for a same-day quote.

Further reading and industry references

For specification background rather than parts supply, these are the sources our engineers check when a drawing is ambiguous or a code question comes up:

  • Otis — original equipment documentation and product families.
  • Schindler — comparable door and drive architectures on competing platforms.
  • TK Elevator — modernisation references for mixed-generation installations.
  • Elevator World — industry reporting on maintenance practice and code changes.
  • ASME — A17.1 / A17.3 safety code scope for elevator and escalator work.

Shipping & warranty

Lead time

Stocked items ship the same working day. Non-stocked and custom-configured boards normally ship within 3–10 working days; we confirm the actual lead time in the quotation rather than quoting a standard number.

Packing

Boards ship in anti-static bags with desiccant and foam-in-box protection. Mechanical parts are individually boxed. Export cartons are sealed and palletised for sea or air freight.

Warranty

12 months against manufacturing defect from delivery date. Boards carry a test report before dispatch. Safety components are supplied with the documentation required for statutory inspection.

After sales

Installation guidance, parameter backup files and commissioning notes are provided on request. Failed boards can be returned for repair through our exchange channel, typically 30–50 % of new-board cost.

FAQ

Are these genuine Otis parts?

They are cross-matched replacement parts built to the original interface specification — same connectors, same pin-out, same mounting dimensions. We supply by specification rather than by OEM label, which also covers part numbers Otis has superseded or discontinued.

Can I interchange two part numbers that differ only by suffix?

Usually not. Suffix codes encode logic level, voltage and firmware generation. GAA177HB1 (PNP, active high) and GAA177HB2 (NPN, active low) are pin-compatible but electrically opposite; fitting the wrong one produces early or late levelling. Send us the suffix and we will confirm.

What is the minimum order quantity?

One piece. Consumables such as comb plates, step rollers, skirt brushes and buttons are cheaper per unit when ordered as maintenance sets — ask for a set quotation.

Do you ship outside China?

Yes. We ship worldwide by express courier, air freight or sea freight, and supply the commercial invoice, packing list and technical statement required for customs clearance in your market.

My part number is not in this list.

Send us the number, a photo and the unit nameplate. Most references not listed here can still be sourced — the list above covers our running stock, not the full sourcing range.

Need a quotation or help identifying a part?

Send the part number, a photo of the original and the unit nameplate — we confirm the correct replacement and quote within one working day.

Request a quote
ONE ELEVATOR — elevator & escalator spare parts, cross-matched by interface specification. Part numbers shown are cross-reference identifiers for specification matching; OEM names and trademarks belong to their respective owners. Technical data is provided for guidance — always verify against the unit nameplate and applicable local code before installation.

One Elevator Team

20+ years elevator parts supplier. Genuine parts for OTIS, KONE, Mitsubishi, Hyundai. Fast global shipping. Contact [email protected]
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