Remeha boiler faults: fault codes, causes and parts (page 6 of 6)

Codes 751 to 806 of the 806 fault codes for Remeha. Looking for a specific code? Use the search on the first page.

Remeha boiler fault codes 751 to 806 of 806

The code list is split over 6 pages. Looking for a specific code? Use the search on the first page: it searches all 806 codes in one go.

Code	Cause
H03.08	False flame
H03.09	Low voltage
H03.09	Low voltage.
H03.17	Fault in gas control system.
H03.17	Fault in gas control system
H03.254	Unknown error
H03.254	Unknown error.
H03.26	Boiler calibration request.
H03.26	Boiler calibration request
H03.28	Synchronisation error
H03.28	Synchronisation error.
H03.31	Blocked chimney fault.
H03.31	Blocked chimney fault
H03.54	Unknown error
H03.54	Unknown error.
H20.36	Manual calibration failed.
H20.36	Manual calibration failed
H20.39	No primary calibration
H20.39	No primary calibration.
H20.40	No gas configuration.
H20.40	No gas configuration
Knipperend red signaal	Fault:
b 08	Too little air transport during pre-purge. After 4 restarts (5 starts) the boiler goes into lockout with code 08
b 24	Flow and return sensors have been swapped
b 25	Maximum permissible rate of rise of the heat exchanger temperature exceeded
b 26	If minimum gas pressure switch LD connected (option): below minimum gas pressure
b 30	Maximum permissible difference between flow and return temperature exceeded
b 43	One or more set parameters are outside the range
b 52	Maximum flue gas temperature exceeded.
b 62	If water pressure sensor connected (option): water pressure is too low
b 88	Blocking input is open.
b XX	Lockout mode
b25	Normal operating modes and therefore does not indicate a fault
b26	The contacts of the external protection opened during heat demand
b28	Fan defective or not properly fitted
b29	Fan continues to run after the post-purge time or speed indication is not correct
b30	Normal operating modes and therefore does not indicate a fault
u 401	Temperature detected by the limit thermostat on the generator body is HIGH
u 402	Temperature detected by the flue gas thermostat HIGH
u 406	Temperature detected by the ambient sensor LOW.
u 407	Temperature measured by the condenser inlet sensor, flue gas sensor or generator fin sensor HIGH.
u 410	Insufficient water flow (the circulation pump is on and the water flow regulator/flow meter detects too low a flow).
u 411	Insufficient rotation of the hydraulic pump.
u 412	Burner does not switch on.
u 429	Gas valve remained off for 5 seconds (with burner control unit switched on).
u 436	Fan faulty
u 446	Hot water inlet temperature too high (when the appliance is operating).
u 447	Hot water temperature too low (when the appliance is operating).
u 448	High hot water temperature differential.
u 452	Activation of the defrosting function. Defrosting is activated if at least 90 minutes have elapsed since the previous defrosting (or 180 minutes if the temperature is lower than -5 °C), if the burner control unit has been switched on for at least 15 minutes and if the ambient temperature, the hot water at the inlet and the evaporator require it to be activated.
u 453	The warning is generated if the system is operating in conditioning mode and the liquid flow meter/water flow meter of the hot module is closed.
u 478	High hot water outlet temperature
u 479	Water temperature at the burner inlet has dropped below 4°C (the code generated signals the actual activation of the antifreeze function). In that case the antifreeze function activates the circulation pump in the system. If the same temperature drops further below 3°C, the antifreeze function also switches on the burner control unit.
u 480	Parameters incomplete
u 481	Data Bank 1 not valid, while Data Bank 2 OK.
u 482	Data Bank 2 not valid, while Data Bank 1 OK.

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