Daikin FTXS20K2V1B Operation Manual page 42

Troubleshooting
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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
• Turn the power off and then on again. If the LED display recurs, the outdoor unit PCB is faulty.
• Diagnosis marked
* Do not apply to some cases. For details, refer to the service guide.
41
RED
MALFUNCTION
DETECTION
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●
● ●
●
● ● ●
● ● ●
● ●
● ● ● ●
● ● ● ●
● ● ●
● ● ●
● ● ● ●
●
●
− − − −
●
− − − −
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
* O VERLOAD RELAY WORKED OR HIGH DISCHARGE PIPE
TEMPERATURE
FAULTY COMPRESSOR START
INPUT OVERCURRENT
* T HERMISTOR OR CT ABNORMALITY
HIGH TEMPERATURE SWITCHBOX
HIGH TEMPERATURE AT INVERTER CIRCUIT HEATSINK
* O UTPUT OVERCURRENT
* R EFRIGERANT 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