PTAC Service Manual

Service Manual

Technical Information

ABOUT THE CONTROLS ON YOUR UNIT

There are ON/OFF, WARMER, COOLER, MODE, FAN SPEED and TIMER six buttons in all;

1. Press ON/OFF button under OFF mode to turn on the unit. If press WARDMER or COOLER button under OFF mode, the dual

8 nixie tube will display indoor temperature for 15s and then turn off. If press MODE button under OFF mode, the controller will

resume to the operation status before power-off. Operation indicator is in green.

2. Under ON status, every button is in valid

(1) ON/OFF: It is used for turning OFF the system.

(2) MODE: It is used for switching between Cool, Fan, Heat and Dry (optional).

(3) WARMER or COOLER: 1. It is used for increasing temperature or timer setting

2. It is used for decreasing temperature or timer setting.

(4) FAN:It is used for setting high, medium, low or auto fan speed. The corresponding LED will be on.

(5) TIMER:It is used for setting timer function

3. Timer function: It can be set either by buttons on control panel or by remote controller

(1) Timer ON: When the unit is off, timer ON can be set. Setting range is 0.5~24h. When timer ON time is reached, the system

will operate according to the set mode.

(2) Timer OFF: When the unit is off, timer OFF can be set. Setting range is 0.5~24h. When timer OFF time is reached, the

system will stop operation.

( 3 ) Timer Setting: Press TIMER button to set timer function and Timer icon will be on. Dual 8 nixie tube will display selected

time which can be adjusted by pressing “+”or“-”buttons. The range of timer setting is from “--” to 24h. 5s after timer setting, the

timer function will be activated and TIMER LED will be on. If “--” is displayed, the system will stop timer setting.

(4) Timer Preview: when timer function has been set, press TIMER button to preview the remaining time of timer.

(5) If Timer function has been set, turning on/off the unit or power failure will cancel timer setting.

4. Sleep function: This function can be set only by remote controller. This mode will bring a more comfortable sleeping

environment. Please contact customer service center or refer to the service manual for more details.

5. DRY function: Without reducing the room temp. , air conditioner can dehumidify and make the room air dry and comfortable.

6. Buzzer: optional

When controller is energized, or valid remote control signal/ button signal is received, the buzzer will give out a beep.

7. Auto fan speed

Fan speed can be automatically selected according to different modes or indoor temperature to achieve higher comfort.

8. Emergency cooling operation: Emergency cooling, Subject to your choice – allowed or rejected).

When indoor ambient temperature 30

C, the unit will start cooling automatically. When indoor ambient temperature reaches

C, the unit will stop operation.

9. F code remote controller: optional