Field Maintenance - Carrier 42QHP09E8S Service Manual

3.2

Field maintenance

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Problem
Unit will not start
Compressor will not start but fans run
Compressor and condenser (outdoor) fan will not start
Evaporator (indoor) fan will not start
Condenser (Outdoor) fan will not start
Unit runs, but shortly stops
Compressor short-cycles due to overload
High discharge pressure
Low discharge pressure
High suction pressure
Low suction pressure
Unit runs continuously but insufficient cooling
Too cool
Compressor is noisy
Horizontal louver can not revolve
Solution
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