In Case Of Heating At The Cooling Mode Or Cooling At The Heating Mode - Samsung AC052FBMDEH/EU Service Manual

4-5-5 In case of heating at the cooling mode or cooling at the heating mode

1. Troubleshooting procedure
Is the Thermo off?
Is the unit in the defrosting
operation?
Is the compressorin 3 minutes off?
Is much frostin the indoor
heat exchanger?
Does the 4-WAY valve
operate normally?
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No
No
No
Yes
No
Yes
No
Change the setting temperature of remote control
Yes
Yes
After 3 minutes, coolingand heating start automatically
Is the outdoor air sensor and
outdoor heat exchanger
attachedcorrectly?
Is the 4-WAY valve
connectorconnected
correctly?
Yes
Check the resistance value of 4-WAY
valve coil
Yes
Dose thevoltage of
AC220V apply to the
connector of
4-WAY valve coil during
the operation?
Yes
4-WAY valve main body error
Check Inner wiring of outdoor unit.
No
Attach the sensor correctly
Yes
Over shortage of the
refrigerant
No
Connect the connecter
correctly
No
4-WAY valve coil error
No
Exchangethe outdoor PCB
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