Figure 1: Mitsubishi Heavy Industries' Haier air conditioner.
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1. Coil Short Circuit or Open Circuit
Mitsubishi Heavy Industries Haier Air Conditioner is a central air conditioner produced by a large electric appliance group Haier in cooperation with Mitsubishi Heavy Industries of Japan, a world-famous collective. Mitsubishi Heavy Industries Haier has production sites in major cities such as Qingdao and Shenzhen, specializing in the production and sale of air conditioners and parts. What is the fault code E57 displayed during the use of Mitsubishi Heavy Industries' Haier air conditioner? What should I do if I find that the air conditioner displays the fault code E57 and eliminate the fault? Under what circumstances will the E57 code be displayed?
Mitsubishi Heavy Industries Haier Air Conditioner
According to the answer given by Shenzhen Samsung Heavy Industry Haier Air Conditioning Maintenance Department, Mitsubishi Heavy Industries Haier Air Conditioner shows that E57 is displayed because of poor cooling of the air conditioner or when the cooling is interrupted, that is, the return air temperature is too high, and the return air superheat is increased. The reasons for poor air conditioning and cooling interruption are as follows
Figure 2: Mitsubishi Heavy Industries Compressor fault code
1. Lack of snow species or excessive snow species leads to excessively long pipes or poor thermal insulation, which affects the cooling effect
2. Location, space, back, nearby heat sources, dust accumulation, debris blocking, etc. cause the condensation effect to deteriorate
3. Long-term operation of the system and high-temperature operation in the overcapacity range cause micro-blocking of the filter screen and throttling device to affect refrigeration
4. Dry filter, return air filter, suction filter in the press, exhaust muffler filter and other filters cause poor cooling effect
5. Thermal jump of the press; unloading of the press (but running); unstable power supply (phase loss, instantaneous interruption, over- and under-voltage, severe imbalance) leading to interruption of refrigeration
6. If there is no crankcase heating belt, the oil is blocked when the power is turned on for the first time in spring, autumn or winter, and after a long power failure, the oil return is not good due to installation defects: the internal and external height difference is not set. 3. Long horizontal pipe section without oil return
7. Condensation conditions are too good (outside wind without speed regulation), too low high pressure causes a serious drop in flow rate (capillary capillary fixed throttling), the inner tube temperature detection return gas is too hot
Figure 3: the E57 code be displayed
8. Due to the 7 condition condensing end too cold temperature, the fluidity of the oil is deteriorated, the flow rate is seriously reduced, and the oil transfer capacity is caused
Falling, or causing oil clogging
9. The selection is too small and the load is too large (the indoor area and volume are not large but the room temperature is too high)
10. Bad or wrong phase sequence detection, such as bad contactor, unstable output or lack of phase affects the cooling effect
11. When cooling, the maximum outdoor working temperature is 43 degrees, the minimum working temperature is -15 degrees, the maximum indoor working temperature is 32 degrees, and the minimum working temperature is 18 degrees. When the outdoor temperature is lower than 10 degrees C for cooling, the external machine must be Added fan controller. When operating outside the capability range, it will cause equipment failure and/or appliance damage.
Figure 4: Error code troubleshooting
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