Unical Ufly P, Руководство по установке и обслуживанию, Страница: 28 / 36

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Failure that could NOT cause stop of the boiler:
- Error code is displayed, the boiler is in CH demand,
Icon Reset (note that was detected a fault even if the
fault was temporary. Is therefore necessary always
push reset to clear the display’ ‘‘error’’.
Failure that causes the stop of the boiler:
- The error code is displayed, the boiler is in lock. After
resolving the fault press Reset to restart the boiler.
CODE (HCM) DESCRIPTION detected on BMM SOLUTION
ALARM_ 0 Regular operation
ALARM_1 Overheat thermostat
ALARM_2 Low gas pressure
ALARM_3 Overheat thermostat
ALARM_ 4 Ignition failure Check the gas supply or that the ignition/de -
tection electrode is working properly
ALARM_5 Flame lost Check the detection electrode
ALARM_6 Overheating Check pump operation and if needed
clean the heat exchanger
ALARM_7 Aux temperature sensor
ALARM_8 Low water pression
ALARM_9 Outer temperature sensor
ALARM_10 Internal failure
ALARM_11 Unexpected flame
ALARM_12 CH flow sensor Check the efficiency of the sensor (see table
Res/Temp) or its connections.
ALARM_13 DHW Temperature sensor
ALARM_14 CH return sensor Check the wiring, if needed, replace the sensor
ALARM_15 Differential temperature Check pump operation and its speed - remove
any obstructions in the heating system
ALARM_16 Frozen Disconnect power, close the gas valve, de -
frost the heat exchanger carefully.
ALARM_17 Global frozen
ALARM_18 Global differential temperature
ALARM_19 Global overheating
ALARM_20 Gas valve leaking Check the wiring and for any leaks from the
gas valve, replace the Gas valve if needed
WARNING!
Function reserved exclusively to
authorized service centers.
2.10 - Error Codes