Service manual
27
10. Troubleshooting
10.1
Display board
§ Operation
The indicator flashes once every second after power is on and illuminates when the air conditioner is in
operation.
§ Timer indicator:
The indicator illuminates then TIMER is set ON.
§ PRE-DEF. indicator (For cooling & heating mode only)
The air conditioner starts defrosting automatically if outdoor unit frosts in heating operating.
At this time, PRE-DEF. indicator illuminates.
§ Auto indicator:
This indicator flashes when the air conditioner is in AUTO operation.
§ ECON indicator
This indicator illuminates while the air conditioner is in economic operation.
10.2 Troubleshooting
For models adopting electrical function:
Failure phenomenon
Operation
lamp
Timer
lamp
Defrosting
lamp
Auto
lamp
Over current protection of the compressor occurs 4
times
☆ ☆ ☆ ☆
Indoor room temp. sensor is open circuit or short circuit X ☆ X X
Temp. sensor on indoor evaporator is open circuit or
short circuit
☆ X X X
Temp. sensor on outdoor condenser is open circuit or
short circuit (without cooling only models)
X X ☆ X
Outdoor unit protects(outdoor compressor current,
phase order etc)
X X ☆ ☆
EEROM error X ☆ X ☆
Indoor unit communication error X X X ☆
r Extinguish ☆ Flash at 5Hz
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