Bosch SSB85 User Manual

SSB 6720866940 (2017/11) US
Electrical supply | 33
Error Int. nr. Description Checks Solutions
"Too Many Flame Failures" 31
Three times ame lost during one
demand
a- Check the integrity of
the wire connections of the
spark and the earth on heat
exchanger
a- If wires are damaged, replace
them
"Flow Switch Not Closed Error" 32 Flow switch not working / No ow
"Flow Switch Not Open Error" 33 Flow switch not working / No ow
"Flag Byte Integrity Error" 34 Internal software error Replace the power control board
"Ad Hi Cpl Error" 35 Internal software error Replace the power control board
"Ad Lo Cpl Error" 36 Internal software error Replace the power control board
"Register Error" 37 Internal software error Replace the power control board
Tab. 13 Lockout codes
9.10 Blocking errors list
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:
Error Int. nr. Description Checks Solutions
"WD Error Ram" 45 Internal software error Replace the power control board
"WD Error Rom" 46 Internal software error Replace the power control board
"WD Error Stack" 47 Internal software error Replace the power control board
"WD Error Register" 48 Internal software error Replace the power control board
"WD Error Xrl" 49 Internal software error Replace the power control board
"Refhi Too Lo Error" 50 Internal software error Replace the power control board
"Refhi Too Hi Error" 51 Internal software error Replace the power control board
"Reo Too Lo Error" 52 Internal software error Replace the power control board
"Reo Too Hi Error" 53 Internal software error Replace 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" 55 Low water level detected
"Water Level Meas" 56 Low water level measurement error
"Low Water Cutoff Error" 57 Low water sensor error Check the LWCO
If the LWCO is in alarm, try to reset
it.
"Low Water Pressure Error" 58 Low water pressure error
"Low Water Pressure Sensor" 59 Low water pressure
"Flue Gas Error" 60 Flue 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
"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" 62 Block 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" 65 Hot neutral reversed
Check the supply 120 V ac
connection
Reverse the supply voltage polarity
"Net Freq Error" 66 Net 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" 67 Faulty earth connection
Check the earth connection
to the appliance
Restore the earth connection
"WD Communication Error" 68 Watchdog communication error Replace the power control board
Tab. 14 Blocking errors

Bosch SSB85 Specifications

General

Brand	Bosch
Model	SSB85
Category	Boiler
Language	English