000
Normal Operation
010
Overvoltage
Check voltage between terminals 1(red) and 2(brown) at connector.
(B1).Thismust be less than 16 volts.
Check battery, electrical leads and vehicle charging system.
011
Under voltage shut down
Check voltage between terminals 1(red) and 2(brown) at
connector (B1). Thismust be greater than 10.2 volts
Check battery, electrical leads and vehicle charging system.
012
Overheating
Check for possible causes of overheat (water circuit), Sensor.
Check overheat switch resistance values.Temperature at
temperature sensor or overheat sensor is greater than 125°C.
014
Possible overheating detected
Difference of measured values at temperature sensor >15°C
(difference evaluation)
(min. 70°Cwater temperature andmetering pump in operation);
Check temperature sensor and overheating sensor,
replace if necessary. Check values from previous page.
015
Toomany overheats
Remove cause of over heat. Reset control unit using 7 day
timer or fault code retrieval device to unlock control unit. Permanent
overheating counter reading exceeded.Heating enable only
possible bymeans of diagnostics system (press both “LL” keys
simultaneously).
017
Overheating detected
Temperature at temperature or overheating sensor > 130 °C,
emergencyOFF if Fault Code 012 or 014 not applicable; check water
circuit, check temperature sensor and overheating sensor; replace if
necessary. See graph on previous page.
020
Open circuit - glow pin
Check glow pin and electrical leads for continuity, replace if
necessary.
021
Short circuit - glow pin
Check glow pin and electrical leads for continuity, replace if
necessary.
030
Combustion air blower motor
Blower impeller or electricmotor may be jammed (frozen solid, dirty,
etc.) Fix jam, replace electricmotor if necessary.
031
Combustion air blower motor
Check lead to combustion air motor for continuity, replace
motor if necessary.
032
Combustion air blower motor short-circuit
Check combustion air blower motor (electricmotor); replace if
necessary.Check power supply (chafed, corroded etc.)
038
Vehicle fan relay control break
Check electric lead to relay, fix break, replace relay if necessary
Forwiringharness
(
202900700401
(CA060401))
withoutrelay,replaceharness.
039
Vehicle fan relay control short circuit
Check electric lead to relay, fix break, replace relay if necessary
Forwiringharness
(
202900700401
(CA060401))
withoutrelay,replaceharness.
041
Water pump break
Check supply lead towater pump for continuity, remedy break,
replacewater pump if necessary.
042
Water pump short-circuit
Check supply lead towater pump for short circuit, check water
pump, replacewater pump if necessary.
26
Maintenance / Troubleshooting / Repair
Fault Code Fault Description
Causes / Repair
