Traulsen RAC37 Owner's Manual page 8

PROBLEM
1. Product zone temperature too high.
2. Condensing unit fails to start - no hum.
3. Condensing unit fails to start - hums but
trips on overload protector.
4. Condensing unit starts, but fails to switch
5. Condensing unit starts and runs, but short
cycles on overload protector.
IX. TROUBLESHOOTING GUIDE
POSSIBLE CAUSE/REMEDY
1. Control Setting Too High - Reset Control
2. Inadequate Air Circulation - Rearrange Product Load To
Improve Air Circulation And Flow. Keep Empty Trays in Position.
3. Unit May Need To Be Manually Defrosted. (Refer to Page 5.)
4. Unit May Be In Defrost Cycle. See Indicator Light. Close Door And
Wait 20 Minutes for Defrost Cycle To Finish.
5. Clean the Condenser (Refer to Page 6.)
1. Line Disconnected - Reconnect
2. Fuse - Replace Fuse
3. Overload Protection - Determine Reason & Correct,
Replace If Necessary
4. Unit may need to be defrosted or has tripped off due to overload.
Wait 30 minutes: Unit will self-reset.
1. Improperly Wired - Check Wiring Against Diagram
2. Low Voltage - Determine Reason & Correct
3. Starting Capacitor Defective - Determine Reason & Replace
4. Relay Not Closing - Determine Reason & Correct,
Replace If Necessary
5. Compressor Motor Has Winding Open Or Shorted - Replace
Compressor
6. Internal Mechanical Trouble In Compressor - Replace
Compressor
7. Unit may need to be defrosted or has tripped off due to overload.
Wait 30 minutes: Unit will self-reset.
1. Improperly Wired - Check Wiring Against Diagram
off of "start" winding.
2. Low Voltage - Determine Reason & Correct
3. Relay Failing To Open - Determine Reason & Correct,
Replace If Necessary
4. Run Capacitor Defective - Determine Reason & Replace
5. Excessively High Discharge Pressure - Check Discharge
Shut-Off Valve, Or Insufficient Cooling On Condenser
6. Compressor Motor Has Winding Open Or Shorted -
Replace Compressor
7. Internal Mechanical Trouble In Compressor -
Replace Compressor
1. Additional Current Passing Through Overload Protector -
Check Wiring Diagram. Check For Added Fan Motors,
Pumps, etc., Connected To Wrong Side Of Protector
2. Low Voltage To Unit (or unbalanced if three phase) -
Determine Reason & Correct
3. Overload Protector Defective - Check Current - Replace Protector
4. Run Capacitor Defective - Determine Reason & Replace
5. Excessive Discharge Pressure - Check Ventilation, Restrictions In
Cooling Medium, Restrictions in Refrigeration System
6. Suction Pressure Too High - Check For Possibility Of
Misapplication. Use Stronger Unit
7. Compressor Too Hot (return gas) - Check Refrigerant Charge
(fix leak) Add If Necessary
8. Compressor Motor Has Winding Shorted - Replace Compressor
-7-