Lennox ALLIED Commercial TCA180S2B Standard Manual page 22

TABLE 1
LED
Indicates
Status
No power to
Off
board.
On Processor error.
Flashes
Normal.
Slowly
Flashes Invalid unit DIP
Rapidly switch selected.
Simultaneous
Flashes
heat and cool
Rapidly
demands.
*Press pushbutton and immediately release to override the
4−minute compressor minimum run time.
Action
Check field wiring.
Press MCC pushbutton and
hold for three seconds to reset
processor.*
None.
Make sure switches are set
correctly. Refer to figure 5.
Check thermostat and wiring.
MCC CONTROL BOARD (A45)
R W1 Y1 C G BL W2
OUT
A2
FIGURE 6
UNIT TYPE DIP SWITCH (FACTORY−SET)
TGA UNITS
THA UNITS
LED
Y4
Page 22
TCA UNITS
UNUSED
(HEARTBEAT LED WILL FLASH
RAPIDLY IN ERROR)
FIGURE 5
A2