Malfunction and Remedies
Park heating (optional)
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Error code
number/num-
ber of flash
pulses
error info Possible causes Remedy
Fuses Check F1, F15 and F16 fuses
Electrical wiring Check battery connections: + to 12 /
- to 9 / + to 3 (switch-on signal), X8
plug
Heater lock Release heater lock
0 no function (only
five short flash
pulses)
Control unit fault Replace control unit
Check fuel level
Check fuel filter
Check that tank outlet and fuel line
do not leak
Fuel system
Vent fuel system
Combustion air/exhaust line Check combustion air and exhaust
line for foreign bodies and clean if
necessary
1 Does not start
Burner unit Clean burner unit and replace if
necessary
Check fuel level
Check fuel filter
Check that tank outlet and fuel line
do not leak
Fuel system
Vent fuel system
2 Flame extinguishes
in combustion oper-
ation
Burner unit Clean burner unit and replace if
necessary
Check battery3 Overvoltagte/under-
voltage
Power supply
Check electrical connections
4 Premature flame
detection
Exhaust gas temperature sen-
sor fault
Check function of exhaust gas tem-
perature sensor, replace sensor if
necessary
5 Not available Not available Not available
Wiring Check wiring for damage, gaps and
short-circuit
6 Coolant tempera-
ture sensor fault
Coolant temperature sensor
fault
Check function of coolant tempera-
ture sensor, replace if necessary
7 Metering pump fault Wiring Check wiring for damage, gaps and
short-circuit
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