Trouble shooting 21
No Operation (Power is ON)
Forecast of Cause:
1. | Setting/ Connection failure 2. External cause |
3. | Electrical component defective |
Check Point 1 : Check indoor and outdoor installation condition
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.
OK
Turn off Power and check/ correct followings.
Is there loose or removed communication line of Indoor Unit and Outdoor Unit?
OK
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 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. | ||
OK
If the symptom does not change by above Check 1, 2, replace Main PCB.
