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The Ductless Split System of Choice
19
COMMON TO ALL AIR HANDLERS - SEQUENCE OF OPERATION
Continued
ON/OFF SWITCH
The
On/Off
switch is used to turn the equipment on or
off. In the
off
mode the display will be blank and all LED
indicator lights will be dark. To turn on the unit press the
On/off
button once. Room temperature will be displayed
and amber LED indicators will show fan speed and mode
selections (
Figure 5)
.
FAN OPERATION
The indoor unit utilizes a two-speed motor with three
operational fan modes. The
Fan
button will allow the selec-
tion of the desired fan setting. An amber LED indicator will
light next to the fan speed selection. If
Auto
fan mode is
selected then an LED indicator will also light next to
Auto.
High
and
Low
are constant fan settings. The fan will
operate continuous regardless of set point or room tem-
peratures.
Auto
mode is a cycling fan setting.
Auto
fan mode can only be selected if the unit is in
Heat
or
Cool
mode. In
Auto
mode the fan will cycle with
the call for Heat or Cool. Fan speed will be determined by
the microprocessor and speed adjustment will be made
according to room and setpoint temperatures. The fan will
switch to
High
speed when room temperature deviates by
MODE SWITCH
(System Switch)
The
Mode
button will allow the selection of the desired
mode of operation. Colored LED indicators will light next
to the selected mode. With each successive press of the
Mode
button, selection will rotate between
Heat, Cool,
Fan or Dry
mode. If the dipswitches are set for cooling
only (off – off) then
Heat
and
Dry
will not be accessible
(
Figure 5)
.
COOLING ONLY OPERATION
For cooling operation first turn the unit on via the
On/off
button. Select
Cool
mode via the
Mode
button. The room
temperature will be displayed. Then, by depressing either
the
Up
or
Down
arrow once, the setpoint temperature will
appear. The setpoint temperature can then be changed with
each successive press of the
Up
or
Down
arrow buttons
or by holding the button in. Place the setpoint temperature
below the room temperature. The compressor will start and
cooling will continue for a minimum of two minutes and as
long as the setpoint remains below room temperature.
(On
initial startup or if power is lost, there is a three-minute delay
between compressor re-starts.)
Once the room temperature is satisfied and the two-
minute minimum run time has elapsed the compressor will
cycle off. The fan will operate as described in “Fan Opera-
tion”
(
Figure 5)
.
NOTE:
Once the compressor is switched off there
is a three-minute delay before it will re-start.
more than two degrees from setpoint. The fan will switch
to low speed if the deviation is one degree. When the room
temperature reaches setpoint temperature the heat/cool call
will then be dropped. The fan will stay on for an additional
60 sec. to purge unit of any residual energy. After the fan
has been off for ten minutes, the fan will cycle on for 60
seconds. This is done so the microprocessor can sample
the room air and also helps eliminate room temperature
stratification.
When the unit is in
Dry
mode the fan speed will remain
constant at
low
speed. While the unit is in
Fan
mode,
Auto
is bypassed and only
High
or
Low
are available (
Figure 5)
.
START-UP FOR UNIT MOUNTED INFRARED COMPATIBLE CONTROL
(Only)
UNIT MOUNTED INFRARED COMPATIBLE CONTROL
Figure 5
1
2
3
4
5
6
7
8
9
1. LCD Display
2. Temp. Set Point Down Button
3. Temp. Set Point Up Button
4. Infrared Sensor
5. Power ON/OFF Button
6. Mode Indicator LEDs (HEAT, COOL, FAN, DRY)
7. Mode Selection Button
8. Fan Operation Button
9. Fan Indicator LEDs (HIGH, LOW, AUTO)
