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Troubleshooting Guide
Trouble 6
Check the wire connection of PTC Heater (Refer to Wiring Diagram)
• Check the connecting condition of CN-PTC connector on the indor DC P.C.B Ass'y.
• Check the soldering condition of CN-PTC connector on the indoor DC P.C.B Ass'y.
Check the Heater driving Circuit.
• Check the pattern between MICOM Pin No.
If there is no problem result of all above check.
• Inner side disconnection of PTC Heater unit or restriced operating condition of PTC Heater
(pipe temp. is over 45°C, defrosting operation, compressor off, indoor fan off).
74 Room Air Conditioner
The heater does not operate at all.
Turn off main power
IC02M Pin No.
48
IC02M Pin No.
7
10
CN-PTC
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