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Display LED STATUS
E4 Outdoor units temp. sensor or connector of temp. sensor is defective
Display LED STATUS
E5 Compressor voltage protection
Is connection to connector of pipe temp. sensor good?
Check the resistance of the temp. sensor according to Annex 1
Repair connector
No
Yes
Replace the sensor
Yes
Check the voltage of power supply, if the voltage is about 220V, turn off the
power supply to indoor unit and turn it on again after 1 minute
Does the trouble occur again?
Check the voltage of secondary of T3 transformer in outdoor power board,
is this voltage 12-14V (AC)
No
Replace the outdoor power board
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