Samsung AM032MNQDCH/AA Service Manual page 307

4-4-64 CCH Malfunction and Sump Sensor Miswiring Error
Outdoor Unit Display
Indoor Unit Display -
Judgment Method • Refer to the judgment method below
Special Cause • CCH Connector PCB is not connected /Sump sensor compressor separated / Own problem of CCH
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.
Is the CCH connector connected to PCB?
Is the sump sensor attached
to the lower part of the compressor?
Is CCH resistance normal?
(500~700Ω/infinite for disconnection)
Does the E445 error occur even after
the outdoor unit power is put back in?
Samsung Electronics
Yes
Yes
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
Troubleshooting
4-107