Haier AS18ND1HRA-WHITE Service Manual

Contents

Functions and control1 8 Domestic air conditionerTTC（°F）Abnormal stop230Decreasing the frequency rapidly（1HZ/second）215.6Decreasing the frequency slowly (1HZ/10seconds)208.4The frequency doesn’t change.199.4Increasing the frequency (1HZ/10second)194Increasing the frequency（1HZ/1second）TTC>=230°F lasts for 20 seconds. Overheating protection of air-blowing, alarm malfunction to theindoor, others don’t last.7.1.4.2 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 therunning state). TC=indoor coil temp.The indoor heat exchanger sensor tests the temperature of the indoor heat exchanger. If thetemperature is higher than 131°F, 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 116.6°F, recover to the normal control.TC(°F) The compressor stops Fgh_t1 149°FFgh_t1－2Fgh_t2－2 N Decreasing the frequency rapidly Fgh_t2 138.2°FP Decreasing the frequency slowly Fgh_t3 131°FFgh_t3－2Fgh_t4—2 Q Prohibiting increasing the frequency Fgh_t4 123.8°FR Increasing slowly Fgh_t5 116.6°FFgh_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 unit7.1.4.3 The control of preventing the over current of the compressor:During the starting process of the compressor, if the current of the compressor is greater than 11A for3 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 power is off.During the starting process of the compressor, if the AC current is greater than 8.5A, the frequency ofthe compressor decreases at the speed of 1HZ/second.During the starting process of the compressor, if the AC current is greater than 8A, the frequency ofthe compressor decreases at the speed of 0.1HZ/second.