Installation and operating instruction
Oil condensing boiler WTC-OB 18-B
10 Troubleshooting
83311002 1/2018-03 La
98-132
The following faults must only be rectified by qualified personnel:
Fault codes
Cause
Rectification
F52
Data record error burner
Interrupt the voltage supply temporarily, reset
appliance if necessary
Reset appliance, replace boiler
electronics WCM-OB-CPU if occurring re-
peatedly.
F53
Supply voltage or power frequency outside the
tolerance limits
Check mains supply
Interrupt the voltage supply temporarily
Reset appliance, replace boiler
electronics WCM-OB-CPU if occurring re-
peatedly.
F54
Electronic fault
Interrupt the voltage supply temporarily
Rectify electromagnetic disturbance source
Reset appliance, replace boiler
electronics WCM-OB-CPU if occurring re-
peatedly.
F55
Memory fault
Interrupt the voltage supply temporarily
Rectify electromagnetic disturbance source
Reset appliance, replace boiler
electronics WCM-OB-CPU if occurring re-
peatedly.
F56
Negative component test
Interrupt the voltage supply temporarily
Check plug cable for burner mains voltage
Check ignition unit
Reset appliance, replace boiler
electronics WCM-OB-CPU if occurring re-
peatedly.
Short to ground on the pump motor or oil
solenoid valve stage 1
F57
Communication boiler
electronics WCM-OB-CPU and boiler control
panel WCM-OB-CUI faulty
Check the connection
Check plug cables of sensors
Plug of combustion chamber pressure sensor
twisted
Interrupt the voltage supply temporarily
Reset appliance, replace boiler
electronics WCM-OB-CPU if occurring re-
peatedly.
F58
[reset] button defective
Interrupt the voltage supply temporarily
Check [reset] button
Replace boiler control panel WCM-OB-CUI
F59
Internal communication error
Interrupt the voltage supply temporarily
Reset appliance, replace boiler
electronics WCM-OB-CPU if occurring re-
peatedly.
F60
Data record error boiler
electronics WCM-OB-CPU
Transferring data from coded plug to boiler
electronics WCM-OB-CPU:
switch off appliance using switch S1.
Press and hold keys [Enter] and [reset] sim-
ultaneously and switch on appliance
The display shows
bcc
Confirm with [Enter]
F61
Coded plug BCC not plugged in
Plug in coded plug