Junkers PCB OC-118 · 873791898A for ZWB30/32 1 A23
Application for the exact variant pending confirmation. PCB with registered application for Junkers ZWB30/32 1 A23. Their exact function and that of the separate green module, identified with the label 873792116A, are pending confirmation.
- Type of part
- Junkers
- Status
- Refurbished
- internal SKU
- PLC231
- Warranty
- 1 year
Compatible Junkers boilers
Junkers. 0 verified compatibilities. There are another 1 models that we are still checking.
Models pending verification
These models are associated with this reference, but we have not finished verifying them yet, so we do not consider them compatibleIf your boiler is one of them, send us a photo of the part you are going to replace and we will verify it before you purchase.
| Junkers ZWB30/32 1 A23 | Junkers | Unconfirmed |
|---|
Can't see your model or have questions? The printed reference takes precedence. How to check it · Send us a photo via WhatsApp.
How to check if it is the part for your boiler
The part reference, model, and equipment revision must be verified against the manufacturer's documentation.
- Look for the code 873791898A on the label or bag of your spare part and the marking OC-118 on the printed circuit board.
- Check if your PCB has a separate green module and compare its label: 873792116A and 08 15 38 3805.
- Turn it over: on the back there should be a traceability label with 873791679A… and SV6.0.
- Check the data plate of your boiler to see that the model is Junkers ZWB30/32 1 A23, the one you have registered.
- if they match, call us at 911 17 77 77 with the model of your boiler.
Symptoms that require diagnosis in the junkers
Common symptoms and faults
- 01
The boiler does not ignite and the display shows EA.
Cause: Flame not detected: gas valve closed, insufficient gas pressure, faulty electrodes or ignition cable, or blocked flue.
Check that the gas valve is open and the gas pressure. Inspect the electrodes and their cable. If everything is fine, have a technician check it.
- 02
The display shows F0.
Cause: Internal fault: faulty electrical contacts or ignition cables, or defective PCB.
Check the electrical contacts and the ignition cables. If the fault code persists, have a technician replace the PCB.
- 03
The boiler stops due to excessive temperature and the display shows E9.
Cause: The temperature limiter of the heat block or exhaust gases has tripped.
Check the service pressure, the pump, and the fuses on the PCB, and bleed the unit. If the fault code returns, have a technician check it.
- 04
The boiler continues to detect flame after cutting off the gas, and FA appears on the display.
Cause: Gas valve that does not close tightly, dirty condensate siphon, or defective electrodes.
Check the gas valve, clean the condensate siphon, and inspect the electrodes. If the issue persists, have a technician check it.
- 05
The display shows CC: the boiler does not detect the external sensor.
Cause: Interruption in the external sensor or its cable.
Check that the outdoor sensor and its cable have no interruptions. If they are fine, have a technician check it.
- 06
A8 appears on the display: the boiler is not communicating with the controller.
Cause: Communication interrupted with the bus: connection cable of the regulator or thermostat loose, cut, or poorly connected.
Check the connection cable of the regulator or thermostat and its terminals. If the cable is fine, have a technician check it.
Junkers fault codes that require diagnosis
| Code | Fault | Technical checks |
|---|---|---|
| EA | Flame not detected when igniting. | Check that the gas valve is open, the gas pressure, and the electrodes with their cable. If everything is fine and the fault code persists, the PCB is suspect: have a technician check it. |
| F0 | Internal fault of the PCB. | Check the electrical contacts and the ignition wires. If the fault code persists, the PCB is suspect: have a technician replace it. |
| FA | The flame is still detected after the gas disconnection. | Check the gas valve, clean the condensate siphon, and inspect the electrodes. If the issue persists, have a technician check it. |
| E9 | The temperature limiter of the heat block or exhaust gases has been triggered. | Check the service pressure, the operation of the pump and the fuses on the PCB, and bleed the unit. If the fault code returns, have a technician check it. |
| A8 | Communication interrupted with the regulator or thermostat bus. | Check the connection cable of the regulator or thermostat and its terminals. If the cable is fine, have a technician check it. |
| CC | The PCB does not detect the outdoor temperature sensor. | Check the outdoor sensor and its cable for any interruptions. It only appears with the outdoor sensor installed. |
| d3 | The external controller has been activated: bridge 8-9 or bridge PR-P0 is missing, or the limiter TB1 is open. | Check the terminal strip, the bridges 8-9 and PR-P0, and the limiter TB1 before suspecting the PCB. |
These symptoms can have more than one cause. If your boiler displays a fault code, send it to us via WhatsApp along with a photo of the labeling, and we'll tell you if this is the part.
Technical sheet: Junkers
- Uniclima internal SKU
- PLC231
- Brand
- Junkers
- Type of part
- Junkers
- Units in stock
- 1 unit
- Status
- Refurbished
- Warranty
- 1 year
- Shipping
- Delivery time shown at checkout
- Return
- 14 days
Part data and available documentation
Contrast the label codes, PCB, and revision with the installed part; they are not necessarily equivalent references.
- Stock code
- 873791898A
- Green module label
- 873792116A
- Additional label for the green module
- 08 15 38 3805
- PCB markings
- OC-118; 94V-0; H; E122808
- Traceability label on the reverse
- 873791679A0615491552; SV6.0
- Identification — Stock code
- 873791898A
- Identification — Label of the separate green module
- 873792116A
- Identification — Additional label of the green module
- 08 15 38 3805
- Identification — PCB Markings
- OC-118; 94V-0; H; E122808
- Identification — Traceability label on the back
- 873791679A0615491552; SV6.0
- Registered reference
- 873791898A
- Additional markings
- Inventory reference with prefix: 873791898A. Separate green module: 873792116A; additional label 08 15 38 3805. PCB markings: OC-118; 94V-0; H; E122808. Traceability label on the back: 873791679A0615491552; SV6.0.
- Pending applications to verify
- Junkers ZWB30/32 1 A23 — compatibility noted; pending confirmation by variant.
- Do not confuse: 873790949A0 — Junkers PCB that is compatible with the ZWB 30/32-1 A23; it is also written as 873790949A (ref. 288.45.0096) — It is a different code from 873791898A. Confirmation registered: 873791898A for that boiler.
- Do not confuse: 8738725710 — PCB Junkers ZWB 30/36-1 — It is from another model, the ZWB 30/36-1, and another code.
- Do not confuse: 8 748 300 437 — Control board of the Junkers Cerasmart ZB/ZWB/ZSB series, according to a service manual — It belongs to a different series: the ZWB 30/32-1 A23 does not appear in that table.
- The unit has several different codes (bag, green module, and reverse). Compare them all with your PCB, not just one.
- registered for the Junkers ZWB30/32 1 A23. not confirmed independently citing 873791898A: the official parts lists cannot be read and another code (873790949A0) for that boiler.
- Pending confirmation of registered applications by model, variant, or programming: Junkers ZWB30/32 1 A23.
Frequently asked questions: junkers
Where is the code for this PCB and what other markings should I compare?
Is it compatible with my Junkers ZWB30/32 1 A23?
Is it compatible with another Junkers boiler other than the ZWB30/32 1 A23?
What does each code of the part mean?
Just to confirm: is another PCB code for the ZWB 30/32-1 A23 the same as 873791898A?
Who should install this PCB?
