Wolf FGB-K Series Installation And Maintenance Instructions For Contractors page 97

Fault Fault
code
06 Temp. limiter excess
temp.
07 Flue gas TL, excess
temperature
11 Flame pretence
12 Boiler sensor faulty
13 Flue gas sensor faulty
14 DHW sensor faulty
15 Outside sensor faulty
16 Return sensor faulty
24 Fan speed <
(too low)
3064458_201811
34. Troubleshooting
Possible causes
The flow sensor has exceeded the limit
of the temperature limiter (95 °C)
System pressure
Air in heating circuit
Temperature limiter in the flow
Pump
The flue gas temperature has exceeded
the limit of the flue gas temperature lim-
iter shutdown temperature of 115 °C.
Combustion chamber
Flue gas temperature limiter
Flame signal is detected when burner
is off.
Boiler sensor or sensor lead has short
circuit or pump break.
Flue gas sensor or sensor lead has
short circuit or break.
DHW sensor (cylinder sensor) or sensor
lead has short circuit or break.
Outside sensor or sensor lead has short
circuit or break.
Return sensor or sensor lead has short
circuit or break.
Set fan speed is not achieved.
Remedy
Check system pressure.
Vent heating circuit.
Temperature limiter in the flow:
- Check leads and plug-in connections.
- If electrical connection OK and
no function, replace temperature limiter.
Pump:
- Check if pump is running.
- If not, check cables and plugs.
- If electrical connection OK and
no function: Replace pump.
Press reset button.
Combustion chamber:
- If the combustion chamber is heavily
contaminated, carry out maintenance or
replace.
Flue gas temperature limiter:
- Check leads and plug-in connections.
- If electrical connection OK and
no function: Replace temperature limiter.
Press reset button.
Check monitoring electrode.
Press reset button.
Pump:
- Increase the minimum pump speed.
Excess flow temperature:
- Increase the minimum pump speed.
Boiler sensor:
- Check leads and plug-in connections.
- If OK and no function, replace the boiler
sensor.
Press reset button.
Flue gas temperature sensor:
- Check leads and plug-in connections.
- If electrical connection OK and
no function: Replace the sensor.
Reset / switch power supply OFF/ON.
DHW temperature sensor:
- Check leads and plug-in connections.
- If OK, replace sensor.
Press reset button.
Outside temperature sensor:
- Check leads and plug-in connections.
- Check for wireless reception interference
or if outside sensor battery is flat.
Return sensor:
- Check leads and plug-in connections.
- If OK and no function, replace the return
sensor.
Fan:
- Check cables, plug-in connections, power
supply and switching.
- If OK and no function: Replace the fan.
Press reset button.
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