Cch Malfunction And Sump Sensor Miswiring Error - Samsung AM009FN1DCH/AA Service Manual

Troubleshooting

4-4-64 CCH Malfunction and Sump Sensor Miswiring Error

Outdoor Unit Display
Indoor Unit Display -
Judgment Method
Special Cause
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
Tlast – Tini < 2°C
Tlast < Outside Air Temperature Sensor Value + 2°C
Outside Air Temperature Sensor Value < 30°C
If , and are satisfied at the same time, then display E445.
Is the CCH connector connected to PCB?
Is the sump sensor attached
to the lower part of the compressor?
(500~700Ω/infinite for disconnection)
Does the E445 error occur even after
the outdoor unit power is put back in?
4-90
Yes
Yes
Is CCH resistance normal?
Yes
Yes
Change PCB.
No
Connect CCH connector to PCB.
No
Attach the sump sensor to the
lower part of the compressor.
No
Change CCH.
No
Normal Operation
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