3-3. No operation (Power is on)
Forecast of cause
Setting/ Connection failure
External cause
Electrical components defective
Check point 1. Check indoor and outdoor installation condition
-> If there is some abnormal condition, correct it by referring to the installation manual and “DESIGN
& TECHNICAL MANUAL”.
↓
Turn off the power and check correct followings.
• Is there loose or removed communication line of indoor unit and outdoor unit?
↓
Check point 2. Check external cause at indoor and outdoor (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 sup-
ply 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 . Replace main PCB
If check point 1 to do not improve the symptom, change main PCB.
↓
End
3-3. No operation (Power is on) - (03-47) - 3. Troubleshooting without error code
TROUBLESHOOTING
TROUBLESHOOTING
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