Vokera Pinnacle System fault E077
Absence of communication with low temperature thermostat
Gas boilerWhat it means
Fault indicating loss of communication between the boiler control board and the low temperature thermostat.
Likely causes
- Communication wiring fault
- Thermostat failure
- Loose connection
Where to start
- Check wiring to low temperature thermostat
- Verify thermostat connection and function
The full answer, free
- How to put it right, step by step
- The manual page for this fault (page 6), 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 System. Check the model on the data plate before you order parts.
Other Vokera Pinnacle System fault codes
- COMAppliance PCB communication lost
- E010Maximum number of ignition attempts
- E011Parasitic flame
- E020Limit thermostat
- E021Gas valve control malfunction
- E033Rotor fan failure damaged
- E034Chimney obstruction in preventilation
- E035Blockage obstruction flue gas low power
- E036Blockage obstruction flue gas high power
- E040Low water pressure (definitive fault/lockout)
- E041Low water pressure (temporary fault)
- E050Smoke obstruction error low power
- E051Smoke obstruction error high power
- E055No card fan communication
- E075Valve opening limit reached
- E091Primary heat-exchanger cleaning fault
- E099Reset attempts exhausted
- FILLow water pressure (warning signal)