Samsung AC052HBLDKH Service Manual page 48

4-5-5 In case of heating at the cooling mode or cooling at the heating mode
1. Troubleshooting procedure
Is the Thermo off?
in the defrosting operation?
Is the compressor
in 3 minutes off?
Is much frost
in the indoor heat
exchanger?
4-WAY valve operate
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4-14
No
Is the unit
No
No
Yes
No
Does the
No
normally?
Yes
Change the setting temperature of
Yes
Operate it with a heating mode
as soon as the defrosting is finished.
Yes
and heating start automatically.
Is the
outdoor air sensor and
outdoor heat exchanger attached
correctly?
Yes
Is the
4-WAY valve connector
connected correctly?
Yes
Check the resistance value
of 4-WAY valve coil.
OK
Dose the
voltage of AC220V
apply to the connector of 4-WAY
valve coil during the
operation?
Yes
4-WAY valve main body error
remote control.
After 3 minutes, cooling
No
Attach the
sensor correctly.
Over shortage
of the refrigerant
No
Connect the connecter
correctly.
NG
4-WAY valve coil error
No
Exchange
the outdoor PCB.
Samsung Electronics