Troubleshooting
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Failure Causes Correction measures
Direct sunshine ID (in cooling) Use window curtain for shading
Heat sources in room Reduce heat sources
Molten fuse in operation
Line short circuit
Notify appointed maintenance
dept.
Failed controller Microprocessor interfered
Reconnect power and start
machine
Not receiving RC signal
RC batteries old or not properly
installed
Replace batteries and correct
installation
Failed communication
Bad contact between wire
controller and main board
Properly connect cables between
them
If the failure is still not cleared, turn off air conditioner, cut off power and contact appointed
maintenance department.
Do not repair the air conditioner on yourself.
(I) Unit system and structure troubleshooting
(1) Neither indoor unit nor outdoor unit operating
Phenomena Possible causes Correction method
Power outage Restore power supply
Transformer burnt down Locate fault, repair/replace transformer
Short circuit between lines Clear short circuit, replace fuse
Molten
fuse
Line earth fault
(bad insulation)
Clear earth fault, replace wire
Power plug not in place or bad contact Correct bad contact, plug in socket
Indoor/outdoor wiring mistake Follow electric diagram in correct wiring
Molten controller fuse Replace controller fuse
Controller burnt down Replace controller
Neither
indoor unit
nor outdoor
unit
operating
Unit failure protection activated Check per failure characteristics/display
Note: This unit features innovative and unique program design capable of automatic control of
number of operating outdoor fans and motor speed according to change of outdoor ambient
temperature etc. to obtain optimum system load configuration.
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