4
OPERATION
- 92 -
Fault Code Read
From the Heater
Malfunction description
Explanations
• Corrective action
21
Blower motor does not rotate or short circuit a er negative
Call the authorized service
Please note!
Provide compliance with the test voltage
Part is destroyed if the voltage value is exceeded.
Make sure that the power supply has adequate short circuit
resistance (20 A minimum).
22 Blower motor, output (+) - short circuit a er UB (battery voltage) Call the authorized service
2F Metering pump - short-circuit or overload Call the authorized service
30 Metering pump - interruption Call the authorized service
31 Metering pump output (+) - short circuit a er UB (battery voltage) Call the authorized service
32 Too many failed operation attempts (operation locked) Call the authorized service
33 Flame detected during operation Call the authorized service
34 Safety time exceeded
No fl ame detected during operation cycle.
• Check the exhaust and combustion air system.
* Check the fuel supply / fuel amount
Call the authorized service if the problem is not solved
35 Flame interruption during “POWER” control
Heater ignited during power stage (fl ame detected) and fl ame
interruption signal issued.
• Check the exhaust and combustion air system.
* Check the fuel supply / fuel amount
Call the authorized service if the problem is not solved
36 Flame interruption during “HIGH” control stage
Heater ignited during power stage (fl ame detected) and fl ame
interruption signal issued.
• Check the exhaust and combustion air system.
* Check the fuel supply / fuel amount
Call the authorized service if the problem is not solved
37 Flame interruption during “MEDIUM” control stage
Heater ignited during power stage (fl ame detected) and fl ame
interruption signal issued.
• Check the exhaust and combustion air system.
* Check the fuel supply / fuel amount
Call the authorized service if the problem is not solved
A/C and Heater
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