Troubleshooting - Wolf COB Installation Instructions And Technical Manual

Fault Fault
code
40 Insufficient water
pressure
42 Condensate pump is
not pumping anything
out
52 Max. cylinder heating
time exceeded
78 Header sensor fault
Insufficient heating
system heating,
frequent cycling
No DHW heating
3062547_201507

34. Troubleshooting

Cause
The pressure switch does not switch on, water
pressure is too low (< 0.8 bar)
Faulty condensate pump, drain line blocked, no
power supply to pump
Set cylinder temperature is not being reached,
insufficient flow
Faulty header sensor or lead
Air in the heating or cylinder system
Sensor is not detected by the boiler
Remedy
Check system pressure >1.5 bar
Check water pressure switch, check lead,
press reset
Check pump, check drain line, check
mains plug and fuse
Vent cylinder, increase cylinder heating
time (HG20), check cylinder sensor
assembly
Check sensor and lead
Vent radiators, vent cylinder primary
circuit, vent heating circuit pumps, vent
boiler
Switch boiler off and on; sensor will be
detected on restarting
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