Compressor and/or outdoor fan motor doesn’t stop.
B Check of outdoor unit
Start
Turn OFF the power supply. After 1 minute, turn ON power supply again.
No
Does compressor stop?
Yes
OK
No
Does outdoor fan motor stop?
Yes
OK
Is there 230V AC between 3 on the | No | ||
compressor contactor (52C) and N on the |
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outdoor terminal block (TB1)? |
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| Yes |
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Replace the |
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deicer P.C. board. |
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Replace the |
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deicer P.C. board. |
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Rectify the connecting wire.
Unit operates COOL mode even if it is set to HEAT mode.
wFirst, measure the resistance of R.V. coil to confirm it is disconnected or is not
C Check of R.V. coil
Turn ON the power supply and operate the indoor unit in HEAT mode by pressing the EMERGENCY OPERATION switch.
After 3 minutes, does the unit operate in COOL mode?
Yes
Is there 230V AC between CN7211 – 2 on the deicer P.C. board?
Yes
Replace the R.V. coil.
No
No
OK
Replace the deicer P.C. board
Unit operates HEAT mode even if it is set to COOL mode.
wFirst, measure the resistance of R.V. coil to confirm it is disconnected or is not
C Check of R.V. coil
Turn ON the power supply and operate the indoor unit in COOL mode by pressing the EMERGENCY OPERATION switch.
Yes
After 3 minutes, does the unit operate in HEAT mode?
Yes
Is there 230V AC between CN7211 – 2 on the deicer P.C. board?
Yes
Replace the deicer P.C. board.
No
Ok
No
Replace the R.V. coil.
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