Holiday Rambler Imperial 2008, Руководство пользователя

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ELECTRICAL SYSTEMS - CHASSIS — 9
208
2008 IMPERIAL
Troubleshooting
The dash A/C and Heat system uses a
combination of compressed air (developed by
the chassis system), vacuum air (developed by
the vacuum generator) and electric relays and
vacuum switches. Therefore, any repair can be
classi
fi ed in one of fi ve categories:
Electrical
Vacuum
Air Conditioner
Heater
Defroster
No Cooling:
1. Check that the blower is operating,
A/C switch is in A/C or MAX A/C
position, temperature control is turned
to
MAX cooling (blue area).
2. Verify system fuses are not blown.
3. Verify condenser fan is operating.
4. Check power supply to unit and
grounding of system.
5. Check wiring.
6. Coolant valve is leaking.
7. Drive belt is loose or broken.
8. Compressor Clutch is inoperative, will
not engage.
9. Expansion Valve is faulty or frozen.
10. Thermostat control is faulty.
11. Mode control switch is faulty.
12. Compressor is faulty.
13. Loss of refrigerant.
NOTE:
An Ultraviolet or UV blue light is
used for leak detection when dye is
introduced to the A/C System.
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Reduced Cooling:
1. Coolant valve not operating correctly.
2. Air passages are obstructed.
3. Loose or worn drive belt.
4. Check blower and select switch.
5. Thermostat control valve is faulty.
6. Expansion valve is faulty.
7. Compressor is faulty.
8. Low refrigerant charge.
No Heating:
1. Verify A/C switch is turned off.
2. Verify blower switch is turned on.
3. Verify the proper engine coolant level.
4. Verify that the engine is reaching
operating temperature.
5. Verify engine coolant is reaching water
valve attached to unit.
6. Verify operation of water valve to
permit engine coolant to pass through
valve to heater core.
7. Check unit fuses.
8. Check power supply to water valve and
grounding.
9. Check wiring.
10. Engine thermostat faulty.
Blower Does Not Operate or Runs Slow:
1. Check fuses.
2. Check for loose or corroded
connection.
3. Check wiring.
4. Check to ensure ignition switch is on.
5. Check blower and select switch.
6. Motor shaft has seized.
7. Blower wheel is out of alignment.
Damper Doors DO NOT Operate:
1. Is the vacuum generator being powered
and producing a vacuum?
2. Check the vacuum line entering the
unit for vacuum.
3. Check that the vacuum solenoid
mounted on unit is receiving power
from the mode switch. If operating
properly, the vacuum solenoid will feel
hot if current is engaging the solenoid.
4. Check the mode switch.
5. Check wiring.
6. Check for a pinch in the vacuum line
leading to the vacuum motor that
operates the damper door in question.
SYSTEM CONTROL CENTER
The System Control Center (located behind
the overhead access panel between the rails of
the bay compartment) consists of the following
components:
090420h
System Control Center