Trouble shooting 22
Forecast of Cause:
Check Point 2 : Check external cause at Indoor and Outdoor (Voltage drop or Noise)
Check Point 1 : Check indoor and outdoor installation condition
OK
OK
No Operation (Power is ON)
1. Setting/ Connection failure 2. External cause
3. Electrical component defective
Are these Indoor Unit, Outdoor Unit, and Remote Control suitable model numbers to connect?
>> If there is some abnormal condition, correct it by referring to Installation manual and
Data & Technical Manual.
Turn off Power and check/ correct followings.
Is there loose or removed communication line of Indoor Unit and Outdoor Unit?
Instant drop ----- Check if the
re 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.
02-22
If the symptom does not change by above Check 1, 2, replace Main PCB.
OKOK
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