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MODE CONTROL
The mode control pad(s) allow the selection of the operating
modes of the unit.
There is a two second delay before the mode activates its
appropriate relay.
OPERATING SEQUENCE / CHARACTERISTICS
AND FEATURES
Compressor Operation
The run state of the compressor is determined by the
difference between the indoor ambient temperature and
the set temperature. See specic mode of operation for
details.
Compressor Time Delay: 180 seconds
This feature is initiated every time the compressor is de-
energized, either due to:
(1) satisfying the temperature set point
(2) changing mode to fan only
(3) a power interruption or
(4) turning the unit off
The compressor is also time delayed for 3 minutes when the
control is rst plugged in or power is restored after failure.
When the compressor cycles off as a result of satisfying the
“load”, the time delay is typically timed out during the off
cycle. Compressor time delay is bypassed by “Test Mode”.
Return Air Temperature Sensor
The control range is 60°F to 90°F +/- 2.0°F.
Frost Protection Sensor
Temperature settings:
Disable the compressor when sensing 30 +/- 3°F for 2 min.
continuously.
Enable compressor @ 55 +/- 5°F.
The fan should not be affected by the Frost Protection. It
should continue to function normally if freeze protection is
called for.
COOL MODE FOR XQ MODELS
When in the COOL mode, the control will turn on the
compressor when the indoor temperature is 1.5°F above the
set point and turn off the compressor when the ambient gets
below the set point by 1.5°F. The fan will run continuously.
MONEY SAVER MODE
When in MONEY SAVER mode, the system will be turned
on when the indoor temperature gets above the set point by
0.75°F and turns off when the indoor temperature gets below
the set point by 0.75°F. The fan will turn on 5 seconds before
the compressor and turn off 5 seconds after the compressor
stops. If the compressor is delayed the fan will continue to
run while the compressor restarts. If the thermostat remains
satised for more than approximately 9 minutes, the fan will
turn on for a period of 90 seconds for air sampling. Operation
in MONEY SAVER mode will light both the MONEY SAVER
and COOL indicators.
ELECTRONIC CONTROL SEQUENCE OF OPERATION
11
FAN ONLY MODE
When in the FAN ONLY mode, the compressor will not
operate. The fan will run continuously at the user-selected
speed (see “Fan Speed Set” below). Smart Fan is not
available in FAN ONLY Mode.
FAN SPEED SET
XQ fan speed is changed by pressing FAN SPEED button
and scrolling through F1, F2, F3 and SF (Smart Fan) in the
digital display.
There will be a 2 second delay before the fan speed changes
to prevent unnecessary switching of the relays during fan
speed selection.
SMART FAN
On the XQ model, smart fan is activated by pressing the
FAN SPEED button and scrolling through speeds until
“SF” appears in the digital display. Using the remote
control, Smart Fan is selected by the fourth push of Fan
Speed button.
Smart fan changes fan speeds based on the temperature
differential between the ambient and set temperatures.
CHECKING ROOM TEMPERATURE
Check the room temperature at the electronic control
pad by pressing the “FAN SPEED” button and the
“TEMP ” button at the same time on XQ models.
The indoor temperature will display for 10 seconds. Indoor
temperature can be viewed in all modes, including the
TEST mode. The display can be changed back to SET
temperature by pressing any key, except the ON/OFF
button, or after 10 seconds has elapsed.
KEEP ALIVE
The electronic control has a memory to retain all functions
and status as set up by the user in the event of a power
failure. Once power is restored to the unit there is a two
second delay before the fan comes on and approximately
three minutes delay before the compressor is activated,
providing that the mode was set for cooling and the set
point temperature has not been met in the room.
REBOOT/RESET THE CONTROL BOARD
With unit on, press “MODE” and “TEMP/HOUR ” buttons
simultaneously for 10 seconds. If the panel will reboot, you
will hear the fan come on and the temperature window will
read 60 degrees. If this happens, turn the unit off for about
10 seconds and then turn it back on to nish the reboot
cycle. If the panel does not reboot, you possibly need to
replace it.