Trouble shooting 22
Forecast of Cause:
NO
OK
OK
OK
Indoor Unit - No Power
1. Power supply failure 2. External cause
3. Electrical components defective
Check Point 1 : Check installation condition
Isn’t the breaker down?
Check loose or removed connection cable.
>> If abnormal condition is found, correct it by referring to
Installation Manual or Data & Technical Manual.
Check Point 2 : Check external cause at indoor unit and outdoor unit(Voltage drop or noise)
Instant drop ----- Check if there is a large load electric apparatus in the same circuit.
Momentary power failure ----- Check if there is a defective contact or leak current in
the power supply circuit.
Noise ----- Check if there is any equipment causing harmonic wave near electric line.
(Neon bulb or electric equipment that may cause harmonic wave)
Check the complete insulation of grounding.
Check Point 3 : Check electrical components
02-24
2-3 TROUBLE SHOOTING WITH NO ERROR CODE
Check the voltage of power supply.
>> Check if AC198(AC220V-10%) - 264V(10%) appears at indoor unit
Terminal L - N (Power supply).
Check Fuse on Controller PCB (F1).
>> If Fuse is open, check loose terminal, and replace Fuse.
Check Varistor on Controller PCB (VA1).
>> If Varistor is defective, there is a possibility of an abnormal power supply.
Check the correct power voltage.
OK
