
CACH/CAHH/CAHJ & CACH/CAHH/CAHK
Air Handlers
• Installation, Operation and Maintenance Manual •
P/N 240008108, Rev. G [07/08/10]
33
Unit-mounted controller — chassis-mounted keypad/display
Figure 34
CACH/CAHH/CAHK Microprocessor Controller Overview
(continued)
1
5
4
3
2
6
1
Infrared receiver window
.
2
Power LED
—
In Wall Th
ermostat mode — on when power is applied to the unit.
In Infrared Controller mode — on while the cassett e unit is in the ON mode; off while unit is
in the OFF mode.
3
Cooling LED
— On when the unit is in cooling operation.
4
Heating LED
— On during calls for heat.
5
Timer/Alarm LED
— On steady while the unit is in Sleep Timer mode; fl ashes to indicate
fault codes.
6
Clear Filter warning button
— Hold for 3 seconds to clear the Clean Filter warning (indi-
cated when Timer/Alarm LED, item 5, fl ashes 4 times)