"Flow Switch Not Closed Error" 32Flow switch not working / No ow
"Flow Switch Not Open Error" 33Flow switch not working / No ow
"Flag Byte Integrity Error"34Internal software errorReplace the power control board
"Ad Hi Cpl Error"35Internal software errorReplace the power control board
"Ad Lo Cpl Error"36Internal software errorReplace the power control board
"Register Error"37Internal software errorReplace the power control board
Tab. 18 Lockout codes
6.1.2 Blocking errors
If it is “Blocking” error the boiler will go back to normal operation, with no need to press the “RESET” button, once the reason for the failure has been
eliminated.
In the following table the “Blocking” errors are listed:
ErrorInt. nr.DescriptionChecksSolutions
"WD Error Ram"45Internal software errorReplace the power control board
"WD Error Rom"46Internal software errorReplace the power control board
"WD Error Stack"47Internal software errorReplace the power control board
"WD Error Register"48Internal software errorReplace the power control board
"WD Error Xrl"49Internal software errorReplace the power control board
"Refhi Too Lo Error"50Internal software errorReplace the power control board
"Refhi Too Hi Error"51Internal software errorReplace the power control board
"Reo Too Lo Error"52Internal software errorReplace the power control board
"Reo Too Hi Error"53Internal software errorReplace the power control board
"Flame Error 2"54
Flame is detected in a state in which no
ame is allowed to be seen
Replace the power control board
"Water Level Detect"55Low water level detected
"Water Level Meas"56Low water level measurement error
"Low Water Cutoff Error"57Low water sensor errorCheck the LWCO
If the LWCO is in alarm, try to reset
it.
"Low Water Pressure Error"58Low water pressure error
"Low Water Pressure Sensor"59Low water pressure
"Flue Gas Error"60Flue gas pressure error
a- Check the ue gas
pressure switches
b- Check the gas pressure
a- If the ue gas pressure switches
don’t work, replace them
b- If the gas supply pressure is
incorrect, it must be adjusted to the
correct pressure pressure
"Return Temp Error"61
Return temperature is higher than stay
burning temperature
a- Check the return
temperature sensor
b- Verify the pump for ow
circulation
a- Verify that the temperature
sensor has the correct resistance
values. If values are incorrect
sensor must be replaced.
b- Change the pump or restart it
"Blocked Drain Error"62Block drain switch is active
"Wd Freq Error"64
Incorrect Frequency signal or no
communication with the WD
Verify the supplied 120 V ac
current
a- If the supplied 120 V ac current
has a frequency of 60HZ +/- 2% ,
replace the power control board
b- If the frequency is out of range,
consult electrician
"Phase Error"65Hot neutral reversed
Check the supply 120 V ac
connection
Reverse the supply voltage polarity
"Net Freq Error"66Net freq. error detected in the main
Check the frequency of the
supply 120 V ac connection
a- If the supplied 120 V ac current
has a frequency of 60HZ +/- 2% ,
replace the power control board
b- If the frequency is out of range,
consult electrician
"Faulty Earth Error"67Faulty earth connection
Check the earth connection
to the appliance
Restore the earth connection
"WD Communication Error"68Watchdog communication errorReplace the power control board
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