Mitsubishi Heavy Industries V Multi FDC71VNX Technical Manual page 179

1.11.2 Troubleshooting flow
(1) List of troubles
Models SRC40, 50, 60ZSX-S, FDC71, 100, 125, 140VNX, 100, 125, 140VSX
FDC100, 125, 140VNA, 100, 125, 140VSA
Remote control 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 Louver motor failure
None Power source system error (Power source to indoor unit control PCB)
None Power source system error (Power source to remote control)
INSPECT I/U INSPECT I/U (When 1 or 2 remote controls are connected)
INSPECT I/U INSPECT I/U (Connection of 3 units or more remote controls)
Communication error at initial operation (Models SRC40-60 only)
WAIT
Communication error at initial operation (Models FDC71-140 only)
WAIT
None No display
E1 Remote control communication circuit error
E5 Communication error during operation
E6 Indoor heat exchanger temperature sensor anomaly
E7 Return air temperature sensor anomaly
E8 Heating overload operation
E9 Drain trouble
E10 Excessive number of connected indoor units (more than 17 units) by controlling with one remote control
E11 Address setting error of indoor units
E14 Communication error between master and slave indoor units
E16 Indoor fan motor anomaly
E18 Address setting error of master and slave indoor units
E19 Indoor unit operation check, drain pump motor check setting error
E20 Indoor fan motor rotation speed anomaly
E21 Defective panel switch operation
E28 Remote control temperature sensor anomaly
E35 Cooling overload operation (Models SRC40-60 only)
E35 Cooling overload operation (Models FDC71-140 only)
E36 Discharge pipe temperature error
E37 Outdoor heat exchanger temperature sensor anomaly
E38 Outdoor air temperature sensor anomaly
E39 Discharge pipe temperature sensor anomaly
E40 Service valve (gas side) closing operation (Models SRC40-60 only)
E40 High pressure error (63H1 activated) (Models FDC71-140 only)
E41 Power transistor overheat (Models FDC71-140VNX, 100-140VSX only)
E42 Current cut
E45 Communication error between inverter PCB and outdoor unit control PCB (Models FDC71-140VNX, 100-140VSX only)
E47 Active filter voltage error (Models SRC40-60 only)
E47 Inverter PCB A/F module anomaly (Model FDC71VNX only)
E47 Active filter anomaly (Models FDC100-140VNA only)
E48 Outdoor fan motor anomaly (Models SRC40-60 only)
E48 Outdoor fan motor anomaly (Models FDC71-140VNX, 100-140VSX only)
E48 Outdoor fan motor anomaly (Models FDC100-140VNA / VSA only)
E49 Low pressure error or low pressure sensor anomaly (Models FDC71-140VNX, 100-140VSX only)
E51 Power transistor anomaly (Models SRC40-60 only)
E51 Inverter and fan motor anomaly (Models FDC71-140 only)
E53 Suction pipe temperature sensor anomaly (Models FDC71-140 only)
E54 Low pressure sensor anomaly (Models FDC71-140VNX, 100-140VSX only)
E57 Insufficient refrigerant amount or detection of service valve closure (Models SRC40-60 only)
E57 Insufficient refrigerant amount or detection of service valve closure (Models FDC71-140 only)
Description of trouble
178
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'19 • PAC-T-327
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