Remedy: Use a PC, check the accuracy of the signal, check external temperature sensor, check the wiring, check the connectors.

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Wendy McDowell
5 years ago
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1 MAN TRUCK FAULT CODES CONDITIONER WITH ELECTRONIC CONTROL Code Description 3000 Outside temperature sensor Cause: faulty external temperature sensor, wiring harness malfunction. Remedy: Use a PC, check the accuracy of the signal, check external temperature sensor, check the wiring, check the connectors. Control Steps: With the help of a PC, check the accuracy of the "Outside temperature sensor" signal. Resistance Measurements: Outside temperature sensor; control unit heater / air conditioner (A250) - between Pin A4 (+) and Pin A9 (-): ~ 10 ohms at 25 C 3001 Evaporator temperature sensor Cause: faulty evaporator temperature sensor fault harness. Remedy: Use a PC, check the signal accuracy of the check of the evaporator temperature sensor, check the wiring, check the connectors. With the help of a PC, check the accuracy of the signal "sensor of the evaporator temperature". Resistance measurement:

2 evaporator temperature sensor; control unit heater / air conditioner (A250) - between Pin A8 (+) and Pin A9 (-): ~ 10 ohms at 25 C 3002 Heat exchanger temperature sensor Cause: faulty heat exchanger temperature sensor fault harness. Remedy: Use a PC, check the accuracy of the signal, check the heat exchanger temperature sensor, check the wiring, check the connectors. With the help of a PC, check the signal accuracy of the "heat exchanger temperature sensor." Resistance measurement: the heat exchanger temperature sensor; control unit heater / air conditioner (A250) - between Pin A5 (+) and Pin A9 (-): ~ 10 ohms at 25 C 3003 An internal temperature sensor FMI 9, device malfunction Cause: faulty sensor internal temperature, heated driver's cab control unit (A474) is faulty. Remedy: Use a PC, check the signal integrity. With the help of a PC, check the accuracy of the "sensor internal temperature" signal Stepper motor side jets FMI 13, a break or a short to ground

3 Cause: faulty stepper motor side nozzles, fault harness. Remedy: Use a PC, check the accuracy of the signal, perform testing actuators, check the stepper motor side of the nozzle, check the wiring, check the connectors. With the help of a PC, check the accuracy of the signal "Stepper motor side of the nozzle." With PC perform testing actuators "Stepper motor side of the nozzle." 3012 Stepper motor recirculation air Cause: faulty stepper motor recirculation air, the fault harness. Remedy: Use a PC, check the accuracy of the signal, perform testing actuators, check the stepper motor air recirculation, check the wiring, check the connectors. With the help of a PC, check the accuracy of the signal "Stepper motor recirculated air." With PC perform testing actuators "Stepper motor recirculated air." Stepper motor air distribution FMI 13, a break or a short to ground Cause: faulty air distribution stepper motor fault harness. Remedy: Use a PC, check the accuracy of the signal, perform testing actuators, check the stepper motor air distribution, check the wiring, check the connectors.

4 With the help of a PC, check the accuracy of the signal "Stepper motor air distribution." With PC perform testing actuators "Stepper motor air distribution." 3014 Stepper motor bypass FMI 13, a break or a short to ground Cause: faulty stepper motor bypass, fault harness. Remedy: Use a PC, check the accuracy of the signal, perform testing actuators, check the stepper motor bypass, check the wiring, check the connectors. With the help of a PC, check the accuracy of the "stepper motor bypass' signal. With PC perform testing actuators "Stepper motor bypass." 3040 Fan Cause: faulty fan controller, wiring harness malfunction, faulty blower motor. Remedy: Use a PC, check the accuracy of the signal, perform testing actuators, check the wiring, check the plug-in connections, check fan controller, check the fan motor, check fuses F131. check the accuracy of the "Fan" signal using a PC.

5 With PC perform testing actuators "Fan" Compressor FMI 10, the gap Cause: high or low pressure in the cooling circuit, the faulty high / low pressure switch (B203), a faulty compressor clutch (Y114), the fault harness. Remedy: Test the actuator, check the wiring, check the connectors, check the compressor clutch (Y114), measure the voltage. With PC perform testing actuators "Compressor". compressor clutch; control unit heater / air conditioner (A250) - between Pin A24 (+) and Pin A25 (-): V (Ubat) 3050 Solenoid valve FMI 10, the gap Cause: faulty solenoid valve of the front air conditioner (Y117), fault (fail) harness. Remedy: Test the actuator, check the wiring, check the connectors, check the solenoid valve of the front air conditioner (Y117), measure the voltage. With PC perform testing actuators "solenoid valve". The solenoid valve of the front air conditioning; control unit heater / air conditioner (A250) - between Pin A23 (+) and Pin A25 (-): 0 V - the solenoid valve is closed; (UBat) - solenoid valve is opened. Cl. 30, the voltage

6 FMI 1 is too high FMI 2, too low Cause: power supply terminals 30 heater / air conditioner control unit (A250) is too high or too low, fuse F397, the fault harness. Remedy: Use a PC, check the accuracy of the signal, check the wiring, check the connectors, check the fuse F397, measure the voltage. With the help of a PC, check the accuracy of the signal "Kl. 30, the tension. " Terminal 30; control unit heater / air conditioner (A250) - between Pin A19 (+) and Pin A25 (-): In (UBat) 3120 LIN bus LIN - Local Interconnect Network FMI 10, the gap Cause: Fault Harness Remedy: check wiring, check the connectors Coolant Pressure FMI 1 is too high FMI 2, too low Cause: high or low pressure in the cooling circuit, the faulty high / low pressure switch (B203), the fault harness. Remedy: Use a PC, check the accuracy of the signal, check the high / low pressure switch (B203), check the

7 wiring, check the connectors. With the help of a PC, check the accuracy of the signal "coolant pressure sensor" Another option is the body control unit FMI 9, device malfunction Cause: Options for heating cab control unit (A474) and the heater / air conditioner control unit (A250) are incompatible. Remedy: Check whether the installed heating cab control unit (A474) or the heater / air conditioner control unit (A250) Management body cells. 30, the voltage FMI 1 is too high FMI 2, too low Cause: power supply terminals 30 cab heating control unit (A474) is too high or too low, the fault F128 fuse fault harness. Remedy: check wiring, check the connectors, check the fuse F128, measure the voltage. With the help of a PC, check the accuracy of the signal "Kl. 30, the tension. " Terminal 30; Heated driver's cab control unit (A474) - between Pin 3 (+) and Pin 6 (-): (UBAT)

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