Napa COLD POWER 78-1307 Manual De Instrucciones página 8

TROUBLESHOOTING
CLUTCH SLIPPING
1. Low torque problem. Cycle on/off
between 2500-3000 RPM for 50 cycles
to burnish the hub and rotor.
2. Low voltage at the field coil. Check
for wiring shorts, poor connections,
and defective relays.
3. Compressor is seized or tight.
Check torque specs. Repair or replace.
4. High system pressures. Check
compressor oil levels. Excess oil can
slug compressor. Low oil will cause
binding. Condenser restrictions
from blockage or improper fan
operation will reduce air flow and
raise discharge pressures.
5. High heat coming from clutch
bearing will produce loose grease
and then bearing failure.
NOISY CLUTCH
1. Check belt size, tension, and
alignment.
2. Rotor dragging. Air gap is too
small. Reset and shim if necessary.
3. Wrong coil snap ring and installed
wrong. Repair or replace.
4. Field assembly installed incorrect.
Make sure it is bottomed completely
on shoulder. Pilot diameter is worn
undersized. The field shell pilot is
worn oversize. Replace compressor
and/or assembly. The bearing is
damaged. Replace clutch.
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78-1307_manual_102406.indd 8
CLUTCH DOESN'T ENGAGE
1. Excessive air gap. Reset and
remove shims.
2. Voltage at coil isn't minimum
10.8 V. Poor connection, shorts,
relays, or charging system.
3. Resistance problem at coil.
Shorted or open coil. Replace coil
and diagnose electrical problems.
CLUTCH FAILS TO DISENGAGE
1. Clearance between the hub and
rotor is too close. Shim to increase.
2. Rotor snap ring missing or installed
wrong. Repair or replace.
3. The air gap is too small. Reset and
add shims.
4. Clutch engages without turning on
A/C. Diagnose electrcial problem and
repair.
BK 78-1307
10/27/06 8:49:24 AM