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1.1 Wired Handset General Instruction
a. Input power supply：12VAC±10％；Power consumption＜1.5Ｗ。
b. Communication mode：RS-485 standard COM，maximum distance 1200m；
c. LCD Display：4 rows of 22 letters each.
d. Buzzer：When power on, buzzer beeps once;
When operating key pad, every entry beeps once;
When alarm triggers due to error, buzzer beeps 3 times consecutively.
e. Backlight: 20s.
f.
LED Indicator Light: Lighted when operating.
1.2 Key Pad Instruction
a.【ON/OFF】
When the system's power is switched on, press ON to start operation. Press again to reverse the
status of operation.
b.【MODE】
To select mode of operation and switching from cooling to heating.
And vice-versa.
c.【SAVE MODE】
Selecting the SAVE MODE will enable the system to operate with energy-saving condition whereby
the set temperature of returned water will be set at 15 ℃ during cooling and at 37 ℃ during heating.
d.【CHANGE】
To change the operating parameters, press CHANGE and scroll up 5 or down 6 for desired
parameters. When the wired handset is not in application, the CHANGE key can be used to set the
temperature of the returned water.
e.【SET】
To set parameters such as time, time mode, timer, press SET.
f.【SELECT】
To choose menu, press SELECT and scroll up 5 or down 6 for the desired functions. Any
selected function will appear as reversed white on the LCD.
g. 【ENTER】
To confirm the selected function, press ENTER. The LCD panel will display the corresponding
parameters.
h. 【ESC】
To exit the current operation, press ESC. Each exit will return to the previous menu and finally
ending at the main menu interface of the Wired Handset.
RS-232 standard COM（provision）
When keying in or when error occurs, the intensity of the
HAIER CHILLER
backlight is 20s.
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