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User Manual

Troubleshooting

Compressor Will Not Start, 

No Hum

 

Service cord unplugged

Plug in service cord

Fuse blown or removed

Determine reasons and correct

Control stuck open

Repair or replace

Wiring incorrect

Check wiring against the diagram

 

Compressor Will Not Start,

 Hums but Trips Overload Protector

 

Improperly wired

Check against the wiring diagram

Low voltage to unit

Determine the reason and correct

Starting capacitor defective

Determine the reason and replace

Relay failing to close

Determine the reason, correct or replace

Compressor Starts & Runs

 but Short Cycles on Overload Protector

 

Low voltage to unit

Determine the reason and correct

Overload defective

Check current, replace overload protector

Excessive head pressure

Check ventilation or restriction in refrigeration system

Compressor hot-return gas hot

Check refrigeration charge, fix leak if necessary

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