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    MAN Air Conditioning Fault Codes

    MAN Air Conditioning Fault Codes List

    AC stands for “Air Conditioning” in MAN trucks, and identifies malfunctions with the truck’s air conditioning system. This may involve inspecting refrigerant levels, checking electrical connections, testing sensors, examining the compressor, or using diagnostic equipment to gather additional data.

    Go back to MAN Fault Codes
    man ac didelis

    MAN Air Conditioning Fault Codes List

    man ac didelis

    AC stands for “Air Conditioning” in MAN trucks, and identifies malfunctions with the truck’s air conditioning system. This may involve inspecting refrigerant levels, checking electrical connections, testing sensors, examining the compressor, or using diagnostic equipment to gather additional data.

    Go back to MAN Fault Codes

    Enter code you're looking for:

    CODEDESCRIPTION
    3000Outside temperature sensor. The fault state: FMI 5, a short to ground / FMI 12, a break or short circuit to + Ubat. 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: Implementation of monitoring: 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.
    3001Evaporator temperature sensor. The fault state: FMI 5, a short to ground / FMI 12, a break or short circuit to + Ubat. 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. Testing stages: Implementation of monitoring: with the help of a PC, check the accuracy of the signal "sensor of the evaporator temperature". Resistance measurement: evaporator temperature sensor; control unit heater / air conditioner (A250) - between Pin A8 (+) and Pin A9 (-): ~ 10 ohms at 25 ° C.
    3002Heat exchanger temperature sensor. The fault state: FMI 5, a short to ground / FMI 12, a break or short circuit to + Ubat. 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. Implementation of monitoring: 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
    3003An internal temperature sensor. The fault state: 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. Implementation of monitoring: With the help of a PC, check the accuracy of the "sensor internal temperature" signal.
    3011Stepper motor side jets. The fault state: FMI 6, short circuit to + Ubat / FMI 13, a break or a short to ground. 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. Implementation of monitoring: With the help of a PC, check the accuracy of the signal "Stepper motor side of the nozzle". Testing of actuators: With PC perform testing actuators "Stepper motor side of the nozzle."
    3012Stepper motor recirculation air. The fault state: FMI 5, a short to ground / FMI 12, a break or short circuit to + Ubat. 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. Implementation of monitoring: with the help of a PC, check the accuracy of the signal "Stepper motor recirculated air". Testing of actuators: with PC perform testing actuators "Stepper motor recirculated air". Stepper motor air distribution. The fault state: FMI 6, short circuit to + Ubat / 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. Implementation of monitoring: With the help of a PC, check the accuracy of the signal "Stepper motor air distribution". Testing of actuators: With PC perform testing actuators "Stepper motor air distribution."
    3014Stepper motor bypass. The fault state: FMI 6, short circuit to + Ubat / 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. Implementation of monitoring: With the help of a PC, check the accuracy of the "stepper motor bypass' signal. Testing of actuators: with PC perform testing actuators "Stepper motor bypass."
    CODEDESCRIPTION
    3040Fan. The fault state: FMI 5, a short to ground / FMI 6, short circuit to + Ubat. 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. Implementation of monitoring: check the accuracy of the "Fan" signal using a PC. Testing of actuators: with PC perform testing actuators "Fan".
    3041Compressor. The fault state: FMI 5, a short to ground / 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. Testing of actuators: with PC perform testing actuators "Compressor". Voltage measurement: compressor clutch; control unit heater / air conditioner (A250) - between Pin A24 (+) and Pin A25 (-): 16-32 V (Ubat).
    3050Solenoid valve. The fault state: FMI 5, a short to ground / 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. Testing of actuators: With PC perform testing actuators "solenoid valve". Voltage measurement: 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; 16-32 (UBat) - solenoid valve is opened. Cl. 30, the voltage. The fault state: 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. Testing stages: Implementation of monitoring: with the help of a PC, check the accuracy of the signal "Kl. 30, the tension". Voltage measurement: Terminal 30; control unit heater / air conditioner (A250) - between Pin A19 (+) and Pin A25 (-): 16-32 In (UBat).
    3120LIN bus / LIN - Local Interconnect Network. The fault state: FMI 5, a short to ground / FMI 6, short circuit to + Ubat / FMI 10, the gap. Cause: Fault Harness. Remedy: check wiring, check the connectors.
    3130Coolant Pressure. The fault state: 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 wiring, check the connectors. Testing stages: implementation of monitoring: With the help of a PC, check the accuracy of the signal "coolant pressure sensor".
    3150Another option is the body control unit. The fault state: 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).
    3160Management body cells. 30, the voltage. The fault state: 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. Testing stages: Implementation of monitoring: with the help of a PC, check the accuracy of the signal "Kl. 30, the tension". Voltage measurement: Terminal 30; Heated driver's cab control unit (A474) - between Pin 3 (+) and Pin 6 (-): 16-32 (UBAT).
    Show all
    Go back to MAN Fault Codes

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