Daikin FVXG25K2V1B Operation Manual page 40

Troubleshooting
LED ON OUTDOOR UNIT PCB
3MXS, 4MXS, 5MXS series
GREEN
MICROCOMPUTER
NORMAL
LED-A LED1 LED2 LED3 LED4 LED5
GREEN NORMALLY FLASHING
RED NORMALLY OFF
ON
FLASHING
OFF
− IRRELEVANT
LED ON OUTDOOR UNIT PCB
2MXS series
GREEN
MICROCOMPUTER NORMAL
LED-A
GREEN NORMALLY FLASHING
ON
FLASHING
OFF
NOTE
1. Turn the power off and then on again. If the LED display recurs, the outdoor unit PCB is faulty.
2. Diagnosis marked
* Do not apply to some cases. For details, refer to the service guide.
39
RED
MALFUNCTION DETECTION
− − − −
− − − −
NOTE: The LED5 is only available in the 5M series.
DIAGNOSIS
NORMAL CHECK INDOOR UNIT
[NOTE 1]
POWER SUPPLY FAULT OR [NOTE 2]
NORMAL CHECK INDOOR UNIT
HIGH PRESSURE PROTECTOR WORKED OR FREEZE-UP IN
OPERATING UNIT OR STAND-BY UNIT
∗ OVERLOAD RELAY WORKED OR HIGH DISCHARGE PIPE
TEMPERATURE
FAULTY COMPRESSOR START
INPUT OVERCURRENT
∗ THERMISTOR OR CT ABNORMALITY
HIGH TEMPERATURE SWITCHBOX
HIGH TEMPERATURE AT INVERTER CIRCUIT HEATSINK
∗
OUTPUT OVERCURRENT
∗ REFRIGERANT SHORTAGE
LOW VOLTAGE TO MAIN CIRCUIT OR MOMENTARY VOLTAGE
LOSS
REVERSING SOLENOID VALVE SWITCHING FAILURE
FAN MOTOR FAULT
[NOTE 1]
POWER SUPPLY FAULT OR [NOTE 2]
DIAGNOSIS