Dometic ASCDU15HV 1161 Installation And Operation Manual page 17

Universal Air Conditioning Unit
7 .3 .3 Adjusting the Set Point
To view the set point, press and release the Up or Down
button. To adjust the set point, press the Up or Down
buttons to set the desired room temperature (press
and hold either button to scroll). The set point range is
55 °F–99 °F (12 °C–37 °C). After selecting the desired
set point temperature, if no buttons are pressed for three
seconds, the display automatically reverts to showing
the conditioned space temperature. Conditioned space
temperature is continuously displayed. The upper center
dot in the Q3 control lights when the set point is being
adjusted.
7 .3 .4 Fan Operation and Control
Press the Fan button to adjust the fan speed while in
Manual Fan Speed Mode or to switch between Manual
and Automatic Fan Speed Modes. The fan may be
operated manually whether the system is on or off as
long as there is power to the unit. Automatic Fan Speed
Mode can only operate 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 "7: Fan Mode" on
page 20. When in Manual Fan mode, the Auto Fan
LED is off.
7 .3 .5 Nonvolatile Memory
The Q3 control has non-volatile memory requiring no
batteries or backup power. When power is lost, the
operating parameters are retained indefinitely. When
power is restored, the Q3 control resumes operating as
last programmed.
7 .3 .6 Display Inside Temperature
The Q3 control continuously displays conditioned space
temperature. If Mode or Set Point is changed, after three
seconds the Q3 control automatically reverts to showing
inside temperature. If inside temperature is greater than
99 °F (37 °C) or less then 0 °F (-17 °C), the display shows
either 99 °F (37 °C) or 0 °F (-17 °C) respectively as the
maximum or minimum inside temperature.
EN
7 .3 .7 Dimming the Display
Press the Mode and Up buttons simultaneously and
repeatedly to select the brightness setting for the Q3
control.
7 .3 .8 Sleep Mode
Sleep Mode dims all LEDs. When in Sleep Mode, press
any button to brighten the Q3 control, then operate as
usual. See "18: Sleep Mode" on page 22.
7 .3 .9 Lockout Display Mode
Press the Mode, Up, and Fan buttons simultaneously
to select the Lockout Display Mode setting. This mode
locks the Q3 control in the current mode selected. If
a button is pressed, the Q3 control flashes "LC" for
2 seconds then goes back to displaying the inside
temperature. In Lockout Mode, the Q3 control shows
conditioned space temperature and the indicators
operate as normal, yet all button presses are ignored
until Mode and Up and Fan buttons are pressed
simultaneously, then "UL" displays momentarily and the
buttons are unlocked for normal operation. In Lockout
Mode all sensors operate as normal and any fault and
error codes will be displayed.
7 .3 .10 Anti-Ice Routine
The Q3 control occasionally shuts down the compressor
when in Cool Mode to allow any ice to melt that may
have formed on the evaporator coil. The Anti-Ice
Routine shutdown occurs when the conditioned space
temperature falls below 70 °F (21 °C). The default setting
of 70 °F (21 °C) can be adjusted. See "21: Anti-Icing
Routine Adjustment" on page 22.
During a ten-minute cycle period, the compressor shuts
off for 15 seconds for each degree below 70 °F (21 °C)
(default). For example, if the inside temperature is 67 °F
(19 °C), the compressor will shut off for 45 seconds, and
then run for nine minutes and 15 seconds, repeating this
cycle in ten-minute intervals.
Operation
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