Haier HSU09 VHG(DB)-G&W Service Manual

Contents

HSU09VHG(DB)-SM Functions and control26Domestic Air Conditioner5.2.5.2˖TC high temperature-preventing control of the indoor heating unit˖Tpg_indoor is the highest value of the effective indoor unit (start it and it is in accord with the runningstate).The indoor heat exchanger sensor tests the temperature of the indoor heat exchanger. If thetemperature is higher than 55ć, decrease the rotate speed of the compressor and do the hightemperature-preventing protection of the indoor heat exchanger; if the temperature of the indoor heatexchanger is lower than 47ć, recover to the normal control.TC The compressor stops Fgh_t1 65ćFgh_t1ˉ2Fgh_t2ˉ2 N Decreasing the frequency rapidly Fgh_t2 59ćP Decreasing the frequency slowly Fgh_t3 55ćFgh_t3ˉ2Fgh_t4—2 Q Prohibiting increasing the frequency Fgh_t4 51ćR Increasing slowly Fgh_t5 47ćFgh_t5—2NormalN˖Decreasing at the speed of 1HZ/1 secondP˖Decreasing at the speed of 1Hz/10 secondsQ˖Continue to keep the last-time instruction cycleR˖Increasing at the speed of 1Hz/10secondsRemarks: the outdoor unit5.2.5.3 The control of preventing the overcurrent of the compressor˖ƽDuring the starting process of the compressor, if the curren of the compressor is greater than 17Afor 3 seconds, stop the compressor and alarm, after 3 minutes, start it again, if such state appears 3times in 20 minutes, stop the compressor and alarm, and confirm the malfunction. Then continue torun it only after the the power is off.ƽDuring the starting process of the compressor, if the AC current is greater than 12A, the frequencyof the compressor decreases at the speed of 1HZ/second.ƽDuring the starting process of the compressor, if the AC current is greater than 10A, the frequencyof the compressor decreases at the speed of 0.1HZ/second.ƽDuring the starting process of the compressor, if the AC current is greater than 9A, the frequency ofthe compressor increases at the prohibited speed.ƽDuring the starting process of the compressor, if the AC current is greater than 8A, the frequency ofthe compressor increases at the speed of no faster than 0.1HZ/second.