Electrical Systems - Chassis
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DIPLOMAT
9•252
11. Mode control switch faulty.
12. Compressor faulty.
13. Loss of refrigerant.
Reduced cooling:
1. Coolant valve not operating correctly.
2. Air passages obstructed.
3. Loose or worn drive belt.
4. Check blower and select switch.
5. Thermostat control valve faulty.
6. Expansion valve faulty.
7. Compressor faulty.
8. Low refrigerant charge.
Blower Does Not Operate or Runs Slow:
1. Check fuses.
2. Check for loose or corroded connection.
3. Check wiring.
4. Check ignition switch is “ON.”
5. Check blower and select switch.
6. Motor shaft seized.
7. Blower wheel out of alignment.
Damper Doors Do Not Operate:
1. Does motorhome air tank have pressure?
2. Check vacuum generator is being powered and producing vacuum.
3. Check vacuum line entering unit for vacuum.
4. 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.
5. Check mode switch.
6. Check wiring.
7. Check for pinched vacuum line leading to the vacuum motor operating
the damper door in question.
Air Conditioner Refrigeration Components:
Compressor - The compressor is belt driven from the engine through the com-
pressor and electronic clutch pulley. The compressor will pump freon from a low
pressure gas into a high pressure, high temperature gas. This is the start of the refrig-
eration process.
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