OPERATING THE SYSTEM WITH QT CONTROLS
Blizzard
Tur
bo Split System Manual
18
L-3448 ENGLISH
setpoint, the fan speed will decrease to medium speed at 2°F above setpoint and low speed at 1°F above setpoint. Upon a
further drop in internal temperature, the compressor cycles off and the fan will continue to operate at low speed.
In HEAT mode or AUTO HEAT, the fan increases one speed until 3°F below the setpoint is obtained. At that point the fan will
operate at medium speed. As the internal temperature increases or approaches the setpoint, the fan speed will decrease to low
speed and stay at that speed. This cycle is continuous using the AUTO function depending on the mode the system is in.
M
ANUAL
S
PEED
C
ONTROL
OFF mode:
Pressing the fan button will start the blower in speed 1 (low speed, one LED lit, no AUTO fan LED). Subsequent
presses of the fan key will move the fan speed up one speed at a time until speed 3 is reached (high speed) and then it will
move down one speed at a time until speed 1 is reached. At this time one more press will turn the fan off and no indicators will
illuminate. At high speed, three LEDs will be lit, medium speed, two LEDs will be lit and low speed, only the bottom LED will be
lit.
NOTE: The user cannot return the fan speed to AUTO mode while the control is in OFF mode.
COOL, HEAT or AUTO mode:
The default is AUTO fan mode (see automatic fan speed section). When fan button is pressed,
the fan will go to manual operation at speed 1 (low speed). Subsequent presses of the fan key will move the fan speed up one
speed at a time until speed 3 is reached (high speed) and then it will move down one speed at a time until speed 1 is reached.
At this time one more press will return fan back to AUTO mode. During HEAT mode operation, if in AUTO fan mode, maximum
speed is medium speed. However, if manual fan mode is initiated, then all three speeds are used.
A
DJUSTING
D
ISPLAY
B
RIGHTNESS
Press the MODE and plus (+) keys simultaneously. Subsequent presses will adjust the LED from a high, medium and low
brightness.
P
ROGRAMMING
Q
T
D
IGITAL
/C
ONTROL
S
YSTEM
Qt Display/Control systems are programmed at the factory for optimum values. The following programming changes are to be
made by a trained technician or with the aid of a factory technician.
All programming is done in the OFF mode. While in the OFF mode, enter program mode by pressing the MODE and minus (-)
keys simultaneously for three seconds. The display will flash "PO" during those three seconds. After the three-second flash, a
flashing 1 will appear in the display. This 1 is function #1. While in program mode, the OFF LED will flash indicating program
mode. (See Table 2.)
Scroll through the different function numbers by pressing the plus (+) or minus (-) key. When the correct function number is
displayed, press the MODE key to display the current value. Adjust this value by using the plus (+) or minus (-) key.
NOTE: Some functions denote values or test operations that cannot be adjusted.
Press the fan key to save information. This action will return the user to the current function number. Continue to change and/or
observe values by scrolling as described above or press the fan key again to exit program mode and return to OFF mode. When
program mode is exited, the OFF LED stops blinking and remains lit.
F
ACTORY
M
EMORY
R
ESET
This feature can only be used in the OFF mode.
To restore programmed functions to factory settings: Press the plus (+) and minus (-) keys simultaneously for three seconds.
During the three seconds, the display will flash "00" and then a 1 will alternate across the screen until the reset is complete.
F
AHRENHEIT
/C
ELSIUS
D
ISPLAY
Factory Default: Fahrenheit
While in OFF mode, enter program mode by pressing MODE and minus (-) keys for three seconds. The display will flash "PO"
during the three seconds. After the three-second flash, a flashing 1 will appear on the display, which is function #1. While in
program mode, the OFF LED will flash, which indicates program mode. Scroll through the function numbers by pressing the
plus (+) or minus (-) key until #2 is displayed. Press the MODE key and the current value is displayed °F or °C. Use the plus (+)
or minus (-) key to change the value and then, press fan key twice to save information and exit program mode.
L
OW
F
AN
S
PEED
A
DJUSTMENT
Factory Default: 38
The lowest fan speed can be adjusted to suit individual preferences. For instance, the user may wish to decrease the low fan
speed setting in the sleeper compartment to minimize fan noise.
