Dodge ZB 2005, Руководство по обслуживанию

Страница: 1033 / 1873

PRESSURE DIAGNOSIS
Condition Possible Causes Correction
Rapid compressor clutch
cycling (ten or more cycles
per minute). 1. Low refrigerant system
charge. 1. See Refrigerant System Leaks in this group.
Test the refrigerant system for leaks. Repair,
evacuate and charge the refrigerant system, if
required.
2. Faulty Powertrain Control
Module (PCM) 2. Refer to the proper Diagnosis Procedures
manual for testing of the PCM. Test the PCM
and replace, if required.
3. Faulty A/C Pressure
Transducer 3. See A/C Pressure Transducer in this group.
Test the sensor and replace, if required.
4. Faulty A/C Low Pressure
Switch 4. See A/C Low Pressure Switch in this group.
Test the switch and replace, if required.
Equal pressures, but the
compressor clutch does not
engage. 1. No refrigerant in the
refrigerant system. 1. See Refrigerant System Leaks in this group.
Test the refrigerant system for leaks. Repair,
evacuate and charge the refrigerant system, if
required.
2. Faulty fuse. 2. Check the fuses in the power distribution
center (PDC) and the junction block. Repair the
shorted circuit or component and replace the
fuses, if required.
3. Faulty A/C compressor
clutch coil. 3. See A/C Compressor Clutch Coil in this
group. Test the compressor clutch coil and
replace, if required.
4. Faulty A/C compressor
clutch relay. 4. See A/C Compressor Clutch Relay in this
group. Test the compressor clutch relay and
relay circuits. Repair the circuits or replace the
relay, if required.
5. Faulty A/C pressure
transducer. 5. See A/C Pressure Transducer in this group.
Test the sensor and replace, if required.
6. Faulty A/C Low Pressure
Switch 6. See A/C Low Pressure Switch in this group.
Test the switch and replace, if required.
7. Faulty A/C-heater control. 7. See A/C-Heater Control in this group. Test
the control and replace, if required.
Normal pressures, but A/C
Performance Test air temper-
atures at center panel outlet
are too high. 1. Excessive refrigerant oil
in system. 1. See Refrigerant Oil Level in this group.
Recover the refrigerant from the refrigerant sys-
tem and inspect the refrigerant oil content.
Restore the refrigerant oil to the proper level, if
required.
2. Blend door actuator
improperly installed or faulty. 2. See Blend Door Actuator in this group.
Inspect the actuator for proper opertion and
replace, if required.
3. Blend door inoperative or
sealing improperly. 3. See HVAC Housing in this group. Inspect the
blend door for proper operation and sealing.
Repair if required.
4. A/C evaporator air flow
restricted. 4. Check the A/C evaporator for damaged fins,
foreign objects obstucting air flow through the
evaporator fins, and missing or improperly
installed air seals. Clean, or replace componets
as required.
24 - 4 HEATING & AIR CONDITIONING
ZB
HEATING & AIR CONDITIONING (Continued)