Troubleshooting Charts - Clutch, Expansion

Clutch
Symptom	Condition	Possible Cause	Remedy
No attraction.	Wiring normal.	Coil open.	Replace.
	No attraction even when cooler switch is ON.	Wiring parts open, wiring or connection defective (ground, fuse).	Reconnect or replace open wiring parts.
	No attraction even when cooler switch is ON.	Switch parts contact defective, malfunction (thermostat, stabilizer relay, cooler switch).	Repair or replace.
	At switch ON, rotor shows movement, and attracts when pushed.	Rotor to stator clearance too large.	Repair or replace.
Slips.	Clutch slips when rotating.	• Battery voltage low. • Oil on clutch face. • Coil layer short.	• Recharge battery. • Clean off oil. • Replace.

Expansion Valve
Symptom	Condition	Possible Cause	Remedy
Valve outlet not cold.	Temperature difference at outlet and inlet cannot be sensed.	• Heat sensitizing tube gas leakage. • Amount of refrigerant in cycle insufficient.	• Replace expansion valve. • Repair gas leakage point and charge refrigerant.
Valve inlet cold or frosted.	High pressure piping from receiver outlet feels cold.	Receiver clogged.	Replace.
Valve inlet cold or frosted.	Frosts.	Expansion valve inside clogged.	Replace expansion valve and receiver.