Operating instructions

26
Maintenance, Troubleshooting & Repairs
Fault Code Fault Description Causes / Repair
— — — Diagnosis not possible • Adapter cable not connected properly.
• Diagnostic connection damaged.
• Internal control box fault, replace control box / blower unit.
000 No faults — —
005 Warning • Check connection and / or lead for continuity, short circuit and
Short circuit in "Burglar Alarm" output damage.
009 ADR / ADR99 shutdown • Switch the heater off and then on again –
The shutdown must be cancelled by D+ or HA / NA.
010 Overvoltage cutoff Overvoltage applied to control box for at least 6 seconds
–> heater not working.
• Disconnect heater / cable harness plug-in connector, start
the vehicle engine, measure the voltage. Connector B2, PIN
A2 and A3:
– If the voltage is >15 volt or >30 volt, check the generator
regulator and / or the battery.
011 Undervoltage cutoff Undervoltage applied to control box for at least 20 seconds
without interruption –> heater not working.
• Disconnect heater / cable harness plug-in connector, start the
vehicle engine, measure the voltage. Connector B2, PIN
A2 and A3:
– If the voltage is <10 volt or <20 volt, then check the fuses,
the supply cables, the negative connections and the positive
support point at the battery for voltage drop (corrosion).
012 Overheating Overheating sensor signals temperature greater than 120°C.
• Measure the resistive value of the overheating sensor,
connector B1, PIN 2 and 4, for measured values. See page 44.
– If overheating sensor ok, check connection leads for conti-
nuity, short circuit and damage.
014 Possible overheating dettected Difference between measured value in overheating sensor and
(Temperature difference evaluation) temperature sensor is too large.
• Measure the resistive value of the temperature sensor,
connector B1, PIN 2 and 4 and connector B1 PIN 1 and 2; for
measured values. See page 44.
– If temperature sensor ok, check connection leads for
continuity, short circuit and damage.
015 Too many overheats, Control box locked due to too frequent overheating (fault code
Control box is locked 012 or 014) in succession.
• Unlock the control box by deleting the fault memory, see
pages 16 and 25.
017 Overheating, Max. temperature exceeded at the overheating sensor (180°C).
Sensor threshold exceeded • Check overheating sensor —> fault code 012.
• Check control box.
019 Glow plug 1, Glow plug 1 energy input is too low (< 2000 Ws)
Ignition energy too low • Check glow plug for continuity, short circuit and damage
—> Fault code 020.
• Check control box.