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© 200438 1-3 Hydronic 10 (ACH-EW) fault codes HYDRONIC 10 (ACH-EW) DAVIE XD diagnostics manual 6 3-1 Voltage (>30 V for at least 20 seconds) on pins excessive alternator/battery voltage - Cab heater fails during operation 3-2 Voltage (<20 V for at least 20 seconds) on pins insufficient supply voltage, for example - Cab heater fails during operation 4-0 Flame signalling when switching on. Flame defective flame sensor - Cab heater does not start 5-1 Flame sensor short circuit on pins 10 and 12 of - Cab heater does not start or fails during 5-2 Open connection of flame sensor on pins 10 and - Cab heater does not start or fails during 6-1 Short circuit in coolant temperature sensor on - Cab heater does not start or fails during 6-2 Open connection of coolant temperature sensor - Cab heater does not start or fails during 7-1 Short circuit in fuel metering pump (B122) on pins - Cab heater does not start or fails during 7-2 Open connection in fuel metering pump (B122) - Cab heater does not start or fails during 8-3 Combustion device speed deviation due to: defective combustion device - defective electronic unit (D901) - Cab heater fails with a delay of 60 seconds 9-1 Glow filament short circuit on pins 3 and 4 of the - Cab heater does not start 9-2 Open connection of glow filament on pins 3 and 4 - Cab heater does not start 10-0 Too fast a rise in coolant temperature due to: poor flow of coolant - coolant shortage - use of intarder - Cab heater fails during operation 10-4 ACH-EW safety function switched on as a result too many overheatings - Cab heater fails. The ECU blocks after 3 11-1 Short circuit in coolant circulation pump on pins 6 - Cab heater does not start or fails during 11-2 Open connection of coolant circulation pump on - Cab heater does not start or fails during Fault code Fault code description with possible cause Symptom |