CACG/CAHG & CACH/CAHH
Air Handlers
• Installation, Operation and Maintenance Manual •
Comfort where it counts
44
P/N 240008108, Rev. B [082509]
control through the 7-Day Programming
mode.
The Pre-Program Run mode can be en-
1.
tered from Cooling mode, Heating mode
or Auto mode only.
Pre-Program Run mode cannot be en-
2.
tered from Dry or Fan modes.
Pressing the PROGRAM
3.
button
momentarily will enter or exit the Pre-
Program Run mode.
The word “PROGRAM” will appear in
4.
the LCD display.
The setpoint will change to the pro-
5.
grammed setting at the selected time.
To use the Pre-Program Run mode first enter
the program settings through the 7-Day Pro-
gramming mode.
Select a mode of operation (Cooling,
1.
Heating, Auto) and press the PROGRAM
button to enter Pre-Program Run
mode.
As time passes, the setpoint temperature
2.
will be selected according to the time of
day and 7-Day Program settings.
To override the setpoint while in Pre-
3.
Program Run mode, adjust the tempera-
ture using the UP or DOWN ARROW
buttons. The override setting will remain
in effect until the next scheduled event.
(Morning, Day, Evening, Night) At that
time, the setpoint will be the value se-
lected in 7-Day Programming mode.
Clean Filter Alarm
To aid in filter maintenance, the cassette con-
troller will indicate when a scheduled filter
cleaning is required by flashing the Timer/
Alarm LED. During normal operation, the
microprocessor will keep track of the units
run time.
When the clean filter time has elapsed,
1.
the Timer/Alarm LED will flash four
times to indicate that the filter needs to
be cleaned.
The clean filter time is selectable through
2.
the Configuration mode of the Optional
Infrared Hand Held Controller.
Available settings are 250, 500, 750, 1000,
3.
and 1250 hours.
If an evaporator freeze condition is de-
4.
tected four times within a 24-hour period,
the Clean Filter Alarm will appear.
After filter maintenance has been performed,
press the Clear Filter Warning button for three
seconds. The control will respond with a beep
to indicate that the timer has been reset.
Sleep timer
The sleep timer feature allows the user, with
the push of a single button, to have the unit
switch off using the preset timer. When
the control is in the On mode, pressing the
TIMER button will enter or exit the Sleep
Timer mode.
When in Sleep Timer mode, the word “TIM-
ER” will appear on the LCD display. The unit
will continue to operate for thirty minutes ,
then switch off.
To turn the unit back on, press the POWER/
SEND button momentarily.
CACH/CAHH Microprocessor Controller Operation
(continued)
