Traulsen RAC3T owner manual IX. Troubleshooting Guide, Problem Possible CAUSE/REMEDY

IX. TROUBLESHOOTING GUIDE

PROBLEM		POSSIBLE CAUSE/REMEDY
1. Condensing unit fails to start - no hum.	1.	Line Disconnected - Reconnect
	2.	Fuse - Replace Fuse
	3.	Overload Protection - Determine Reason & Correct,
		Replace If Necessary
2. Condensing unit fails to start - hums but	1.	Improperly Wired - Check Wiring Against Diagram
trips on overload protector.	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
3. Condensing unit starts, but fails to switch	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 Disharge
		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
4. Condensing unit starts and runs, but short	1.	Additional Current Passing Through Overload Protector -
cycles on 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

5.Condensing unit runs but short cycles on... 1. Overload Protector - See #4 Above

2.Thermostat - Differential Set Too Close, Widen

3.High Pressure “Cut-Out” Due To:

a)Insufficient Air or Water Supply - Check Air or Water Supply To Condenser, Correct

b)Overcharge - Reduce Refrigerant Charge

c)Air In System - Purge

4.Low Pressure “Cut-Out” Due To:

a)Liquid Line Solenoid Leaking - Replac e

b)Compressor Valve Leak - Replace

c)Undercharge - Fix Leak, Add Refrigerant

d)Restriction In Expansion Device - Replace Device

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