Wolf CGB-2-24 - Troubleshooting and Faults; General Troubleshooting Guidance

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41.Troubleshooting
Messagehistory:
Amessagehistorycanberequestedinthe‘Contractor’menuoftheAMdisplaymoduleorBM-2programmingunit,
displaying the last 20 fault messages.
Generalinformation
Never remove, bypass or otherwise disable any safety or monitoring equipment. Operate the gas condensing boiler
only when it is in perfect technical condition. Any faults or damage which impact or might impact upon safety must
beremediedimmediatelybyaqualiedcontractor.Replacefaultycomponentsandequipmentonlywithoriginal
Wolf spare parts.
Faults and warnings are shown in plain text on the display of the control accessories – AM display module or BM-2
programming module – and correspond to the messages listed in the following tables.
A warning/fault symbol on the display (symbol: triangle with exclamation mark) indicates an active warning or fault
message. A lock symbol (symbol: padlock) indicates that the current fault message has caused a lockout of the
appliance. The duration of the current message is also shown.
Warning messages do not need to be acknowledged and do not lead directly to the appliance being
switched off. However, the causes of the warnings can lead to malfunctions of the appliance/system or to
faultsandshouldthereforeberectiedbyaqualiedcontractor.
Please
note
Faultsmustonlyberectiedbyqualiedpersonnel.Componentorsystemdamagecanresultif
alockoutfaultmessageisacknowledgedseveraltimeswithoutthecauseoftheproblemhaving
beenrectied.
The control unit automatically acknowledges faults such as faulty temperature sensors or other sensors if the part
concerned has been replaced and plausible test values have been supplied.
Please
note
Procedureinthecaseoffaults:
- Read fault message
- Determine cause of fault using the table below and remedy it
- Acknowledge fault
If the fault message cannot be acknowledged, high temperatures at the heat exchanger might be preventing a
reset
- Check that the system is functioning correctly
Pleasenote:
Toacknowledgethefollowingfaultmessages,rstentercontractorcode"1111":
FC 20, 30, 32, 35, 36, 37, 38, 39, 99
Procedureinthecaseofwarnings:
- Read warning message
- Determine cause of warning using the table below and remedy it
- With warnings, there is no need for fault acknowledgement
- Check that the system is functioning correctly