63
LED
LED Status
Indication
Possible Causes
Corrective Action(s)
Off
• Normal condition
• None
• None
• Control power up
• Learn button depressed
Rapid Flashing
• Normal network traffic
• Control is “talking” on
network as expected
• None
• Data 1 and data 2 wires reversed
at furnace, thermostat or
communicating compatible
outdoor AC/HP
• Check communications
wiring (data 1/ data 2
wires).
• Short between data 1 and
data 2 wires.
• Check wire connections at
terminal block
• Short between data 1 or
data 2 wires and R
(24VAC) or C (24VAC
common).
• Check data 1/ data 2
voltages.
Green
Receive
LED
2 Flashes
• Out-of-box reset
• None
On Solid
• Data 1/ Data 2 miss-wire
Red
Communications
LED
Operational Checks
B
URNER
F
LAME
The burner flames should be inspected with the burner compart-
ment door installed. Flames should be stable, quiet, soft, and
blue (dust may cause orange tips but they must not be yellow).
Flames should extend directly outward from the burners without
curling, floating, or lifting off. Flames must not impinge on the
sides of the heat exchanger firing tubes.
Check the
Burner Flames for:
1. Stable, soft and blue.
2. Not curling, floating
or lifting off.
Burner Flame
M
EMORY
C
HIPS
Memory chips are a service only item and are not sent out
with new equipment. They are used only in the rare occur-
rence where communicating equipment shared data needs
to be restored.
Memory chips should not be routinely installed at the time of
installation. A memory chip is not required when an individual
control board or motor is replaced.
A memory chip is only required when all communicating com-
ponents have been replaced with service parts containing no
shared data. If either an existing control board or ECM motor
needed to be replaced, the service part would upload the
necessary data from the remaining communicating compo-
nent. In a fully communicating system, this would include
the communicating thermostat and communicating outdoor
unit control board as the necessary data is stored in all com-
municating devices.
A furnace void of shared data will not function in a legacy or a
fully communicating installation. The furnace display would
show “d0” indicating that there is no shared data in the fur-
nace control board. If it is ever necessary to use a memory
chip, the specific memory chip for your furnace number must
be used.
OPERATIONAL CHECKS
