Haier HSU18VH7-W Service Manual - Page 7

Air conditioner Edition: 10070808 3.2 . Introduction to electrical control functions Including brief introduction to air conditioners of series models and electric control function. Brief introduction to electric control function 3.2.1 Automatic running (applicable to fan-coil model) When the running mode is turned to automation after starting the system, the system will first determine the running mode according to the current room temperature and then will run according to the determined mode. Tr in the following selection conditions means room temperature, Ts means setting temperature, Tp means temperature of indoor coil pipe a. Tr≥23℃ b. Tr Ts+2℃, compressor, outdoor fan run continuously, indoor fan runs as per setting wind speed (State 1); 3.2.3.2 Ts+2℃≥ Tr≥Ts, compressor, outdoor fan run intermittently with 10 minutes ON, 6 minutes OFF. (Compressor and outdoor fan are synchronous) indoor fan runs in fixed lower wind speed, and will cease at the stand-by time of 3 minutes (State 2) 3.2.3.3 Tr