Compressor Clutch: Testing and Inspection

Inspection Flow:

TROUBLE DIAGNOSIS PROCEDURE FOR MAGNET CLUTCH

Steps 1 - 2:

Steps 3 - 5:

Steps 6 - 7:

Steps 8 - 9:

Steps 10 - 11:

Steps 12 - 14:

Steps 15 - 16:

Step 17:

SYMPTOM:
- Magnet clutch does not engage when A/C switch and fan switch are ON.

ELECTRICAL COMPONENTS INSPECTION







A/C Relay
Check continuity between terminals 3 and 5.
If NG, replace relay.







Dual Pressure Switch (KA24DE Models)
Check continuity between terminals.

Triple Pressure Switch (VG33E Models):

KA24DE Models:

VG33E Models:

Thermo Control Amp.
1. Run engine and operate A/C system.
2. Connect the voltmeter from harness side.




3. Check the thermo control amp. operation as shown in the table.

INSPECTION




Clutch Disc
If the contact surface shows signs of damage due to excessive heat, replace clutch disc and pulley.

Pulley
Check the appearance of the pulley assembly. If contact surface of pulley shows signs of excessive grooving, replace clutch disc and pulley. The contact surfaces of the pulley assembly should be cleaned with a suitable solvent before reinstallation.

Coil
Check coil for loose connection or cracked insulation.




Thermal Protector
- When servicing, do not allow foreign matter to get into compressor.
- Check continuity between two terminals.