Contents: Checking the capacitor ⇓ Removal and installation the…⇓ Checking the condenser fan motor ⇓ Checking the receiver-dryer ⇓ Testing a triple pressure switch ⇓
Removing the condenser electric fan.
1 - condenser, 2 - radiator, 3 - radiator electric fan, 4 - condenser electric fan.
Checking the capacitor
1. Check the condenser tube fins for damage or clogging. If clogging is detected, wash these areas with water and blow with compressed air. If deformation (bending) is detected, carefully straighten the deformed fins with a screwdriver or pliers.
2. Check the fittings and other connections of the condenser for leaks. Repair or replace parts if necessary.
Removal and installation the condenser electric fan
Remove and install the compressor according to the assembly drawing "Removing the condenser electric fan".
Checking the condenser fan motor
1. Check the condition of the condenser fan motor connector terminals.
2. Connect the power from the battery to the fan motor terminals as shown in the figure and check the smooth rotation of the fan.
Checking the receiver-dryer
1. Using a leak detector, check the tightness of the fusible plug and the receiver-dryer fittings.
2. Start the engine and set the idle speed to high (warm-up speed). Turn on the air conditioner and check the temperature of the tubes at the receiver inlet and outlet. If a significant temperature difference is felt, replace the receiver-dryer.
Attention:
- Immediately plug the disconnected pipes to prevent moisture and contaminants from entering the system.
- Do not remove plugs from components until the components are ready to be connected.
- When replacing the receiver-dryer, add 40 ml of compressor oil to the compressor.
- Evacuate the system and recharge the system with refrigerant, then check the air conditioning system. The overheat switch turns on the condenser and radiator fans at maximum speed.
Testing a triple pressure switch
The triple pressure switch is a combination of low, medium and high pressure switches.
- a) The low pressure switch turns off the air conditioning compressor when the pressure in the system drops below normal.
- b) The high pressure switch turns off the air conditioning compressor when the pressure in the system exceeds the normal level.
- c) The average pressure switch is used to determine the overheating state of the air conditioning system.
Table. Switch characteristics (operating pressure) (kPa).
| Pressure | OFF↔ON | ON↔OFF |
| High | 3200±200 | 2600±200 |
| Low | 230±25 | 200±20 |
| Average | 1550±80 | 1150+120 |
