Troubleshooting Flow - Mitsubishi Electric FDF100VSXVD Technical Manual

11.2 Troubleshooting flow
(1) List of troubles
Remote controller display
None Operates but does not cool.
None Operates but does not heat.
None Earth leakage breaker activated
None Excessive noise/vibration (1/3)
None Excessive noise/vibration (2/3)
None Excessive noise/vibration (3/3)
None Power supply system error (Power supply to indoor control PCB)
None Power supply system error (Power supply to remote controller)
INSPECT I/U INSPECT I/U (When 1 or 2 remote controllers are connected)
INSPECT I/U INSPECT I/U (Connection of 3 units or more remote controllers)
WAIT Communication error at initial operation
None No display
E1 Remote controller communication circuit error
E5 Communication error during operation
E6 Indoor heat exchanger temperature thermistor anomaly
E7 Return air temperature thermistor anomaly
E8 Heating overload operation
E10 Excessive number of connected indoor units (more than 17 units) by controlling with one remote controller
E14 Communication error between master and slave indoor units
E16 Indoor fan motor anomaly
E19 Indoor unit operation check
E20 Indoor fan motor rotation speed anomaly
E28 Remote controller temperature thermistor anomaly
E35 Cooling overload operation
E36 Discharge pipe temperature error
E37 Outdoor heat exchanger temperature thermistor anomaly
E38 Outdoor air temperature thermistor anomaly
E39 Discharge pipe temperature thermistor anomaly
E40 High pressure error (63H1 activated)
E41 Power transistor overheat
E42 Current cut
E45 Communication error between inverter PCB and outdoor control PCB
E47 Inverter PCB A/F module anomaly (Model FDC 71 only)
E48 Outdoor fan motor anomaly
E49 Low pressure error or low pressure sensor anomaly
E51 Inverter and fan motor anomaly
E53 Suction pipe temperature thermistor anomaly
E54 Low pressure sensor anomaly
E55 Underneath temperature thermistor anomaly (Models FDC 200, 250 only)
E57 Insufficient refrigerant amount or detection of service valve closure
E59 Compressor startup failure
E60 Compressor rotor lock error (Models FDC 200, 250 only)
Description of trouble
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