Koldwave 5AK39BFA, Installation, Operation & Maintenance Manual, Page: 28 / 32

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Trouble Shooting Guide Continued
COMPRESSOR TROUBLESHOOTING
Compressor starts, but stops
after a few minutes. 1 Defective compressor motor. 1 Replace compressor.
2 Defective compressor run capacitor. 2 Check capacitance and replace if necessary.
3 Check the keypad error message ES. 3 Check return air sensor and replace if necessary.
4 Defective condenser fan motor capacitor. 4 Check capacitance and replace if necessary.
5 Loose connection in electrical circuit. 5 Trace loose wire(s) and tighten connection.
6 Refrigerant overcharged. 6 Recover entire refrigerant charge and weigh in proper
charge.
7 Low refrigerant charge. 7 Locate refrigerant leak, recover refrigerant, repair leak,
install filter/drier, evacuate system and weigh in proper
charge.
8 Dirty condenser coil and filter. 8 Clean filter and condenser coil.
9 Condenser fan running at high ESP. 9 Reduce duct length.
10 High head-pressure 10 Check for obstructions within condenser coil and
replace as necessary.
11 High ambient temperature 11 Install condenser air intake kit to draw air from another
area
Compressor starts and runs but
fan does not run. 1 Open fan motor contactor circuit. 1 Check and replace fan motor contactor as necessary.
2 Shorted or open fan motor. 2 Replace motor.
3 Fan motor capacitor incorrect or defective. 3 Check capacitance and replace if necessary.
HEAD PRESSURE TROUBLESHOOTING
Too high 1 Condenser dirty, clogged or restricted. 1 Clean condenser coil.
2 Air or non-condensable gases in system. 2 Recover refrigerant, install filter/drier, evacuate system
and weigh in proper charge of virgin refrigerant.
3 Fan blade or motor defective. 3 Check and replace.
4 Refrigerant overcharged. 4 Recover entire refrigerant charge and weigh in proper
charge.
5 Loose belts 3 Check for proper belt tension. 3
Too low 1 Compressor motor or mechanism defective. 1 Replace compressor.
2 Drier restricted. 2 Replace restricted drier.
3 Low refrigerant charge. 3 Locate refrigerant leak, recover refrigerant, repair leak,
install filter/drier, evacuate system and weigh in proper
charge.
4 Evaporator dirty, clogged or restricted. 4 Clean evaporator coil.
5 Leak in system. 5 Locate refrigerant leak, recover refrigerant, repair leak,
install filter/drier, evacuate system and weigh in proper
charge.
6 Dirty air filter (air flow restricted). 6 Clean filter .
7 Low ambient temperature. 7 Install condenser air intake kit to draw air from another
area.