Troubleshooting 22
Possible causes of trouble
Insufficient air through evaporator coil
Overcharge of refrigerant
Dirty or partially blocked condenser
Air or incompressible gas in refrigerant cycle
Short cycling of condensing air
High temperature condensing medium
Insufficient condensing medium
Broken compressor internal parts
Expansion valve obstructed
Expansion valve or capillary tube closed completely
Leaking power element on expansion valve
Poor installation of feeler bulb
Loosen hold down bolts and / or screws
Shipping plates remain attached
Contact of piping with other piping or external plate
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 ☆ ☆ ☆ ☆ ☆ ☆ ☆ ☆ ☆ ☆ ☆
Compressor is noisy ☆ ☆ ☆ ☆ ☆
Horizontal louver can not revolve
Change charged refrigerant volume
Clean condenser or remove obstacle
Purge, evacuate and recharge
Remove obstruction to air flow
Remove obstruction in air or water flow
Remove obstruction in air or water flow
Test compressor efficiency
Choose AC of lager capacity or add the number of AC
Rectify piping so as not to contact each other or with external
plate
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