Troubleshooting
4-90
Samsung Electronics
1. Judgment Method
Tini = Sump temperature when entering the CH operation delay condition
Tlast= Sump temperature when maintaining CH operation delay for two hours
Outside Air Temperature Sensor Value: Outside air temperature when maintaining CH operation delay for two hours
①
Tlast – Tini < 2°C
②
Tlast < Outside Air Temperature Sensor Value + 2°C
③
Outside Air Temperature Sensor Value < 30°C
If
①
,
②
and
③
are satisfied at the same time, then display E445.
Outdoor Unit Display
Indoor Unit Display
-
Judgment Method
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Special Cause
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No
Connect CCH connector to PCB.
Is the CCH connector connected to PCB?
Yes
No
Attach the sump sensor to the
lower part of the compressor.
Is the sump sensor attached
to the lower part of the compressor?
Yes
Yes
Does the E445 error occur even after
the outdoor unit power is put back in?
Yes
Change PCB.
No
Normal Operation
Is CCH resistance normal?
(500~700Ω/infinite for disconnection)
No
Change CCH.
4-4-64 CCH Malfunction and Sump Sensor Miswiring Error