Samsung AVMKH020EA0 Service Manual page 181

8
Troubleshooting
8-1-3. Compressor preheating - Ch indicated
1. Once the tracking is completed, check the temperature of compressor before starting the system operation.
Ch is displayed at the display part at the time.
2. If it is the condition for compressor operation as the result of check, the flickering of Ch disappears and the indoor unit
address trying to communicate with outdoor unit displays and the responding address on the right part.
3. If it is not the condition for the compressor operation at the moment, Ch is kept flickering on the display part and CCH
(crank case heater) heats the compressor for 2 and half hours.
The compressor cannot be operated for the time, but can be operated if Ch disappears due to the sufficient heating for 2 and
half hours.
4. The check of operation ability by the temperature is performed only once at the initial stage.
However, in case that the product is installed and operated for the first time, the power shall be put 6 hours before.
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