256 Trouble Shooting Guide
Self-diagnosis function
Compres
sor
Outdoor
fan
Outdoor
LEV
No operation
Stop during operation
Loud noise during operation
High pressure error during
cold operation
No heating condition.
Frequent defrost operation.
No operation sound even
after powering on
No heating condition.
Failure of outdoor heat
exchanger.
Low pressure error or dis-
charge error
Destruction of motor insulation
Destruction of motor insulation
Connection wire
Failure of fan motor.
Failure of air flow around outdoor
heat exchanger.
Poor wire contact
Poor coil
LEV clogged
LEV clogged
Measure resistor between com-
pressor power terminal and sash
Measure resistor between com-
pressor power terminal and sash
Check power wiring of the com-
pressor power.
Check that the fan rotates when
turning the outdoor unit on after
turning it off.
Remove obstacles around the
outdoor unit.
Check wire connectors.
Check resistance between ter-
minals.
Check the LEV.
Replace the LEV.
Replace the LEV.
Parts Phenomena Cause Check and Countermeasures
If the system failed, error code is displayed on 7 segments LED of the wired remote control and the outdoor unit
control board.
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