4
OPERATION
- 95 -
Fault Code Read
From the Heater
Malfunction description
Explanations
• Corrective action
31 Metering pump, Short circuit a er +UB Call the authorized service
34 Safety time exceeded
No fl ame detected during operation cycle.
• Check the fuel supply, the exhaust and the combustion air system.
Call the authorized service if the problem is not solved
35
Flame interruption:
Heater ignited during power stage (fl ame detected) and fl ame interruption signal
issued.
"POWER" control stage
• Check the fuel amount, the blower speed, the fuel supply and the exhaust and the
combustion air system.
Call the authorized service if the problem is not solved
36
Flame interruption:
Heater ignited during power stage (fl ame detected) and fl ame interruption signal
issued.
"HIGH" control stage
• Check the fuel amount, the blower speed, the fuel supply and the exhaust and the
combustion air system.
Call the authorized service if the problem is not solved
37
Flame interruption during “Medium” control stage (D 8 W / D 10
W)
Heater ignited during power stage (fl ame detected) and fl ame interruption signal
issued.
"Medium1" control stage (D 12 W)
• Check the fuel amount, the blower speed, the fuel supply and the exhaust and the
combustion air system.
Call the authorized service if the problem is not solved
38
Flame interruption:
Heater ignited during power stage (fl ame detected) and fl ame interruption signal
issued.
"Medium 2" control stage (D 12 W)
• Check the fuel amount, the blower speed, the fuel supply and the exhaust and the
combustion air system.
Call the authorized service if the problem is not solved
A/C and Heater
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