Installation and operating instruction
Oil condensing boiler WTC-OB 18-B
10 Troubleshooting
83311002 1/2018-03 La
99-132
The following faults must only be rectified by qualified personnel:
Fault codes
Cause
Rectification
F62
Data record error BCC
Replace coded plug
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]
F63
Different data records
Incorrect coded plug BCC plugged in
Check coded plug, if necessary replace
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]
F64
Data transfer was not performed properly
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]
F65
Data transfer was not performed properly (e. g.
[Enter] key was not pressed within 8 seconds)
Transfer data from coding plug to boiler
electronics WCM-OB-CPU again:
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]
Incorrect coded plug BCC plugged in
Check coded plug, if necessary replace
F70
Oil preheating not released
Check heat exchanger and temperature
switch, if necessary replace [ch. 9.12]
nocon
Connection boiler electronics WCM-OB-CPU
and boiler control panel WCM-OB-CUI incorrect
Check the connection
Replace boiler control panel WCM-OB-CUI