540
HYDRAULIC SYSTEMS
Studio ti 03312 540-04usa
200
9
9.8 CHILLER UNIT CONTROL PANEL
9.8.1 Basic operation
Turning the system on
Press the POWER or MODE keys to turn the system on. In three
seconds, the system will start operating in whatever mode it was running
prior to the last shut down. Press the MODE key prior to three seconds
(while the display is flashing) to change mode before system starts, or
any time to change the mode while the system is on. The modes available
are: Cool, Heat Auto Switchover (automatically switches from Cool to
Heat Mode), or Dehumidification Mode. A solid dot will light up next to the
words COOL or HEAT when the compressor is on and running in that
mode.
Selecting the setpoint
Press the Up or Down arrow keys to adjust the setpoint (press and hold
keys to scroll); wait three seconds after powering up system. The word
SET will appear in the display while setpoint is being adjusted. The
setpoint range is 55-99 °F (10-40 °C). After selecting the desired setpoint
temperature, if no buttons are pressed for three seconds, the display will
automatically revert back to showing the inside cabin temperature. Inside
cabin temperature is continuously displayed.
Adjusting the fan speed
The Fan key is used to adjust the fan speed while in manual fan Speed
mode and to switch from manual to automatic fan speed modes. The fan
may be run manually whether the system is on or off. The word MANUAL
appears in the display while in that mode. Automatic fan speed mode may
be operated only when the system is on. Fan behavior also depends on
how the Fan Mode function is programmed: - “C” for continuous or “I” for
intermittent running with the compressor (see SMXht keypad/display
programming summary table).
Dimming the display
Press the MODE and Up arrow keys simultaneously and repeatedly to
select the display brightness setting.
Backlight mode
While in the Sleep Mode (backlight is off, see function #20) press any
button to light the display, and then operate as usual.
Important memory function
After changing modes, programming settings, setpoint, etc., wait at least
30 seconds before turning off main power supply in order for new settings
to be maintained in memory.
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