31
LED ON OUTDOOR UNIT PCB 3MXS, 3MKS, 4MXS, 4MKS series
NOTES
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.
LED1 LED2 LED3 LED4
DIAGNOSIS
NORMALLY
FLASHING
NORMALLY OFF
ON
FLASHING
OFF
IRRELEVANT
GREEN
RED
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]
GREEN
MICROCOMPUTER
NORMAL
LED-A
RED
MALFUNCTION
DETECTION
3P098586-1_Eng_1.book Page 31 Wednesday, November 27, 2002 11:31 AM
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