Haier AB122ACERA Service Manual - Page 40

Commercial Air Conditioner Model: AU122AEERA AB122ACERA AC122ACERA AD122ALERA 11℃ 9℃ normal control slow rise FQY 1HZ/10S remaining 6℃ slow reduce FQY 1HZ/10S 1.10.8 Rated operation(the value can be setted by EEPROM) ● Rated cooling: When receiving the indoor rated operation command, the unit will enter rated cooling operation. ● Rated cooling: When receiving the indoor rated operation command, the unit will enter rated heating operation. 1.10.9 Outdoor compulsory operation(select by the outdoor dip switch) ● Compulsory heating operation Dial SW1 of the outdoor small indicate board in ON state, set the heat exchanger temp. from indoor unit 16℃, each protection is available, FQY(20-120Hz), fan speed(inverter: high/middle/low; DC motor: class 1-7) and expansion valve(10-400) can be manual adjusted. ● Compulsory cooling operation Dial SW2 of the outdoor small indicate board in ON state, set the heat exchanger temp. from indoor unit 16℃, each protection is available, FQY(20-120Hz), fan speed(inverter: high/middle/low; DC motor: class 1-7) and expansion valve(10-400) can be manual adjusted. Note: the dip switches for compulsory cooling and compulsory heating can not be setted ON synchronously. 1.10.10 Failure code and troubleshooting The outdoor lamp will flash if there is failure, the flash FQY is 1HZ, the flash time is according to the following table, the lamp will off for 3 seconds after one flash circuit, meanwhile, the lamps on LED board will light in 5-bit binary system(light is 1, LED1-LED5 from low bit to high bit). Alarm lamp is always light when there is no failure. 1.10.11 Special funtions 1) Power operation When receiving the Power operation signal from indoor, the unit will operate as the set frequency by EEPROM. Fan speed will depend on the ambient temperature and the frequency. When the Power signal is cancelled by indoor, the Power operation will stop. 2) Soft operation When receiving the Soft operation signal from indoor, the unit will operate as the set frequency by EEPROM. Fan speed will depend on the ambient temperature and the frequency. When the Soft signal is cancelled by indoor, the Soft operation will stop. 3) Time shorting operation After receiving the time shorting signal, the unit will perform the 1/60 time shorting operation. 4) Compulsory cooling/heating operation Controlled by the buttons on the outdoor small board, only indoor heat exchanger protection is invalid, all the other protections are valid. 40