- Instruction Manual

26
TROUBLESHOOTING AND SERVICING GUIDE
PROBLEM PROBABLE CAUSE CORRECTION
Condensing unit will 1.Line Disconnected, Switch Open. 1.Close Start Or Disconnect Switch.
not start - no hum. 2.Fuse Removed Or Blown. 2.Replace Fuse.
3.Overload Protector Blown. 3.Determine Reason And Correct/
Replace.
4.Control “Off” Due To Cold Location. 4.Relocate Control.
5.Control Stuck In Open Position. 5.Repair Or Replace Control.
6.Wiring Improper Or Loose. 6.Check Wiring Against Diagram.
Condensing unit will 1.Improperly Wired. 1.Check Wiring Against Diagram.
not start - hums but
2.Low Voltage To Unit. 2.Determine Reason And Correct.
trips on overload
3.Starting Capacitor Defective. 3.Determine Reason And Replace.
protector. 4.Relay Failing To Close. 4.Determine Reason And Replace.
5.Compressor Motor Has A Shorted Or Open 5.Replace Compressor.
Winding.
6.Internal Mechanical Trouble In Compressor. 6.Replace Compressor.
7.Insufficient Air Supply. 7.Clear Condenser & Allow
Compressor To Cool Down.
Condensing unit
1.Additional Current Passing Through Overload 1.Check Wire Diagram. Check For
starts and runs, but
Protector. Added Components Connected To
short cycles on over-
Wrong Side Of Overload Protector.
load protector.
2.Low Voltage To Unit. 2.Determine Reason And Correct.
3.Overload Protector Defective. 3.Check Current, Replace Protector.
4.Run Capacitor Defective. 4.Determine Reason And Replace.
5.Excessive Discharge Pressure. 5.Check Ventilation, Restrictions In
Cooling Medium Or Refrig. System.
6.Excessive Suction Pressure. 6.Check For Misapplication.
7.Insufficient Air Supply. 7.Clear Condenser & Allow
Compressor To Cool Down.
Condensing unit 1.Improperly Wired 1.Check Wiring Against Diagram.
starts, but fails to 2.Low Voltage To Unit. 2.Determine Reason And Correct.
switch off of “start” 3.relay Failing To Open. 3.Determine Reason And Replace.
winding. 4.Run Capacitor Defective. 4.Determine Reason And Replace.
5.Excessively High Discharge Pressure. 5.Check Discharge Shut-Off Valve,
Possible Overcharge.
6.Compressor Motor Has A Shorted Or Open 6.Replace Compressor.
Winding.
7.Internal Mechanical Trouble In Compressor. 7.Replace Compressor.