Honda automobile air conditioning refrigeration failure phenomenon. After filling refrigerant. Open air conditioning, on the electromagnetic clutch compressor suction no, idle speed is high and low (850 r/min to 1100 r/min), the fan rotation is normal, but poor refrigeration, you can see the real-time data by OBD Diagnostic Tool.
Detection of electromagnetic clutch of the compressor line, the voltage is normal. After the failure of the circuit is determined, the high and low pressure port of the air conditioning system is measured by using multi meter.. As a result, the pressure at high and low pressure is abnormal, and the pressure is high and low, and under the Launch X431 Diagun III or Xtool PS2 tool checked, the engine was found to rotate abnormally. Ask the driver, there is no phenomenon before the refrigerant filled, and then suspect that there may be too many refrigerants.
Gradually sucked out of a portion of the refrigerant, the engine speed changes observed in the tool to see a few bubble, accelerate to 1700 r/min when bubbles disappear, troubleshooting.
When the air conditioning system of the refrigerant injected too much, it will reduce the flow of refrigerant in the system performance, causing the compressor malfunction, poor refrigeration, the engine idle speed instability, You can check with the Autel MaxiSys MS908 or XTOOL VAG401 tool before you inject the refrigerant, and it will remind you how many refrigerants you should add.