Xuzhou 圣尔达 Refrigeration Electrical Services Limited one, no air conditioning and heating are three major reasons refrigeration cycle system, control system failure 1. insufficient refrigerant. Simple self-test can be performed to identify whether leakage of fluorine. 2. The four-way air valve train. Heat pump air conditioner to switch cooling and heating state by way valve. There should be involved in the heat exchange part of the refrigerant from the compressor outlet pipe directly at the four-way valve returns to the return pipe, leading to contribute to the heat exchange of the refrigerant to reduce, decrease heat exchange efficiency, so as to cause insufficient heating capacity. 3-way valve (also known as non-return valve) leak. High refrigeration system, low pressure drop, air conditioning repair phone, the outdoor heat exchanger temperature rises, reducing heat from the outside obtained, resulting in insufficient heating capacity. Excessive pressure monitoring system is running, you will find the low side pressure rises central air conditioning maintenance, high, low pressure drop. 4. defrost controller failure. The air conditioning can not be promptly transferred to defrost running, occurs when heat pump system evaporator frost phenomenon, affecting the air conditioning and heating of the heat exchange efficiency, resulting in insufficient heating capacity, or even stop. Should focus on the observed temperature defrost device is misplaced, contact sticky side or bad Gree air-conditioning maintenance of telephone, blower wheel slippage or duct obstruction, solenoid or starter relay failure. Xuzhou 圣尔达 Refrigeration Electrical Services Ltd heating air conditioning is not the cause of the second, an improper use, air conditioning after a long time there is no time cleaning the filter and internal air circulation caused by blockage will affect the air conditioning and heating effects to a certain extent . 2, evaporator, condenser thick grime, will reduce the effect of heat transfer, resulting in decreased heating capacity, increase power consumption; heating temperature is set too low. 3, air-conditioned room door, hole in the wall is not blocked, or open windows frequent cause indoor heat loss, etc. will be inadvertently causing the air conditioning system is not strong warming causes. Central air conditioning repair service _ _ Sheng Erda refrigeration provided by Xuzhou 圣尔达 Refrigeration Electrical Services Limited. Xuzhou 圣尔达 Refrigeration Electrical Services Limited (xzktw.com) strong, credible, in Xuzhou heat exchangers, refrigeration and air conditioning equipment industry has accumulated a large number of loyal customers. The company better work attitude and constantly improving innovative ideas will lead Sheng Erda refrigeration and you hand into the brilliant, for a better future!