Haier AU42NALEAA Service Manual - Page 256

>a__WcU[S^ a`V[e[a`Wc 1. Communication function Communicate with the indoor PCB in the group control network To communicate with the indoor PCB through the R S-485 bus (A, B). The central controller sends commands to and receives response from indoor PCB; communication by address enables sending and receiving control information, work information and fault information between indoor PCB and the central controller. 2. LCD display function: The LCD could display the fundamental status of air conditioning units (are the units existing? On/off? Fault? Are units group selected? Cursor and the current unit no.); The LCD can display the working status of the air conditioning unit with the current number (mode, fan speed, temperature setting, room temperature,timer,error code, central/remote control status); The working status of the central controller (monitor/set status, panel locking status, signaling status). 3. Key input function: The keys for moving the current unit number cursor and for group selection: , , , , SELECT; The keys for setting working status of the air conditioning unit and control conditions: ON/OFF, MODE, FAN SPEED, TEMP, TIME / , CLOCK,TIMER, CENT/REM, SET; The key for locking key function of the central controller: LOCK. 4. Unit number setting function: To enrich the control functions of Haier commercial air conditioner remote monitoring system, multiple controllers could be set to work together for a combination of multiple functions. For this, the central controller is provided with a two-digital switch for setting controller address. 5. Realizing central control function with the central controller(max.128 indoor units can be connected) this type is applicable for the unitary free indoor units except for cabinet type. indoor outdoor 6. Central control system + Group control system(max.128 x16 indoor units can be connected),this type is applicable for the unitary free indoor units except for cabinet type. MODE AUTO FAN ONLY COOL DRY HEAT TES FAN AUTO HIGH MED LOW FIX CENTRAL OPERATION STANDBY PRE-HEAT DEFROST FILTER HEALTH UNIT NO. CEN.ADD. SYS.ADD. CHECK DEMAND SWING MANUAL C ROOM TEMP. SET TEMP. F TIMER CLOCK UP DOWN VENTILATION ON OFF AUTO RECOVERY DAILY NORMAL MODE FAN SWING HEALTH TEMP CLOCK TIMER SET RECOVERY CHECK FILTER RESET ON/OFF 123 CN5 123 CN5 MODE AUTO FAN ONLY COOL DRY HEAT TES FAN AUTO HIGH MED LOW FIX CENTRAL OPERATION STANDBY PRE-HEAT DEFROST FILTER HEALTH UNIT NO. CEN.ADD. SYS.ADD. CHECK DEMAND SWING MANUAL C ROOM TEMP. SET TEMP. F TIMER CLOCK UP DOWN VENTILATION ON OFF AUTO RECOVERY DAILY NORMAL MODE FAN SWING HEALTH TEMP CLOCK TIMER SET RECOVERY CHECK FILTER RESET ON/OFF 123 CN5 123 CN5