Vokera Pinnacle Combi fault COM
Appliance PCB communication lost
Gas boilerWhat it means
Signal indicating communication with the appliance PCB has been lost for more than 30 seconds. The boiler continues to operate but with no display or keys.
Likely causes
- PCB communication fault
- Display board wiring fault
- Ignition failure
- Flame instability
Where to start
- Check wiring between display and main PCB
- Check PCB function
- Check Flow probe value against expected boiler flow temperature
The full answer, free
- 16 more checks in order
- The readings and component tests from the manual
- How to put it right, step by step
- The manual page for this fault (page 8), right under the answer
Safety: Isolate gas and power before you open the case. If you have been into the gas side, do a tightness test, and a combustion and flue check before you hand back. Gas Safe (UK) or RGI (Ireland) work only.
From the Vokera manual for the Pinnacle Combi. Check the model on the data plate before you order parts.
Other Vokera Pinnacle Combi fault codes
- E010Maximum number of ignition attempts
- E011Parasitic flame
- E034Chimney obstruction in preventilation
- E035Blockage obstruction flue gas low power
- E036Blockage obstruction flue gas high power
- E041Low water pressure (temporary fault)
- E042Water transducer - LWCO error
- E050Smoke obstruction error low power
- E051Smoke obstruction error high power
- E055No card fan communication
- E056No communication microprocessor card
- E070CH probe error
- E071Heating temperature over limit
- E072Delta T return out of limit
- E077Absence of communication with low temperature thermostat
- E080Return probe error
- E081Return temperature over limit
- E082Warning delta temperature
- E090Exhaust probe error
- E091Primary heat-exchanger cleaning fault
- E095Calibration failed
- E096Lambda over limit
- E099Reset attempts exhausted