Check Of The Heatsink Temperature Abnormal Rise; Check Bldc Compressor Starting Error - Samsung SH09BWHA Service Manual

Troubleshooting
6-3-13 (N) Check of the heatsink temperature abnormal rise
√ If the air flow around the heatsink on the control box is not good, heatsink temperature will go up and the control box
will have damage. So controller check the heatsink temperature and protect at the certain limit.
Possible troubles are fan motor trouble, fan motor drive circuit trouble and air flow blocking.
Condition of installation
• The ventilation is not good because the outdoor unit is installed wrong (the ambient temperature is higher than 50(˚C)).
→ Reinstall the outdoor unit so that the ventilation can be made.
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• In case that the operation is made with the cover bent of the outdoor unit.
→ Take out the cover.
•
• If two outdoor unit are operating face to face,(the bad ventilation is made)
→ Reinstall the outdoor unit for the good ventilation.
•
• The air circulation is bad due to the attachment of falling leaves.
→ Take away the leaves for the good ventilation.
•
• If the refrigerant is insufficient.
→ Fill up the amount of refrigerant.
•
Unit defect
• If the fan is locked with some object.
→ Remove the object.
•
• If the comp is operating without the revolution of fan motor.
→ Take out the protection cover
•
→ Check the fan motor connector(CN54), running capacitor, relay(RY503) and replace the fan motor.
•
6-3-14 (O) Check BLDC compressor starting error
√ If the compressor have some trouble inside like locking or gas pressure of suction and discharge pipe is not balanced,
Inverter system will give up compressor rotation control to protect itself from overcurrent.
√ In case of compressor rotation starting trouble without overcurrent condition, controller detect the compressor
rotation error and stop.
√
• Compressor wire connection is not good.
→ Check Compressor TAB terminal connection of the wire and connector to control box.
√ •
√
• Gas pressure balance is not good at stop condition.
→ Check service valve open.
√ •
→ Check EEV motor attachment and connector.
√ •
√
• Compressor is locked or have some mechanical damage.
→ Replace the compressor.
√ •
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