Frost working condition

 (1) the frost starting single phase motor price conditions: outdoor heat exchanger tubes for less than 3 ℃ temperature of compressor running time reached more than 40 minutes. (2) the frost process: (1) compressor with a fixed 80 hz frequency operation. (2) the four-way valve, outdoor fan shut down. (3) the end of the frost conditions: (1) frost up to 10 minutes. (2) www.dongfeng-motor.com the outdoor heat exchanger copper tube wall temperature is higher than 5 ℃ (4) of the indoor and outdoor machine ac motor specification of communication. Indoor and outdoor machine USES asynchronous serial communication mode: indoor machine as the host, for outdoor communication lamination from the machine. 2 consecutive received exactly the same information is valid. Two minutes without communication or receiving signal fault, a fault alarm and shut down the outdoor and indoor fan.