1.Normal
If the refrigeration cycle is normal, the gauge pressure values are as shown.
Low-pressure side
0.15 to 0.25 MPa (1.5 to 2.5 kgf/cm
Diagnosis of Malfunction in Automotive Refrigeration Cycle
1.Importance of checking pressure
Checking the refrigerant pressure while the air conditioning is functioning allows you to assume the trouble area or the cause. Therefore, it is important to confirm Read more Diagnosis of Malfunction in Automotive Refrigeration Cycle
Automotive Air Condition System Visual and Aural Check
1.Is the drive belt loose?
If the drive belt is too loose, it will slip; this will cause it to wear out.
2.Amount of air blow is insufficient
Check for dirt and clog in the clean air filter.
3.Noise Read more Automotive Air Condition System Visual and Aural Check
Automotive Air Condition System Inspection/Test
Notes for Maintenance of Air Conditioning System
1.When handling refrigerant the following precautions must be observed
Do not handle refrigerant in an enclosed area or near an open flame.
Always Read more Automotive Air Condition System Inspection/Test
Automotive Air Condition System Idle-up Control
1.Function
In idle state such as in slow traffic or during stop, the engine output is small.
In this state, driving the compressor applies overload to the engine, which results in overheating or engine Read more Automotive Air Condition System Idle-up Control
Automotive Air Condition System Dual A/C (Rear Cooler) Control
1.Function
The dual A/C and the refrigeration cycle with rear cooler have evaporators and expansion valves for front and rear. These make the refrigerant circulate using a compressor.
To control two Read more Automotive Air Condition System Dual A/C (Rear Cooler) Control
Automotive Air Condition System Pressure Switch Control
1.Function
A pressure switch is installed on the high-pressure side of the refrigeration cycle. When the switch detects abnormal pressure in the refrigeration cycle, it stops the compressor to prevent Read more Automotive Air Condition System Pressure Switch Control
Automotive Air Condition System Control
Outline
1.Description
To operate the A/C normally or to reduce the damage to the components when a malfunction occurs, the signals from each sensor or switch are sent to the A/C amplifier in order Read more Automotive Air Condition System Control
Automotive Air Condition System EPR (Evaporator Pressure Regulator)
1.Function
When the evaporator becomes frosted, no air passes between the fins. In this condition, the heat exchange rate reduces, which results in insufficient cooling capability. The refrigerant does Read more Automotive Air Condition System EPR (Evaporator Pressure Regulator)
Automotive Air Condition System Expansion Valve (Box Type)
1.Function
An expansion valve injects the high-temperature and high-pressure liquid refrigerant, which has passed through the receiver, from the small hole to cause the refrigerant to expand suddenly Read more Automotive Air Condition System Expansion Valve (Box Type)