Instructions / Assembly
SERVICING
117
LED LED Status Indication
Possible
Causes
Corrective
Action
(
s
)
Notes &
Cautions
Off • Norm al
condition
• None • Non e • None
• Depress once
quickly for a power-
up reset
• Depress and hold
fo r 2
seconds for an out-
of-box reset
• Control power up
• Learn button
depressed
• No power • No power to
modular blower
• Check fuse s and
circuit breakers;
replace /reset
• C o m m un ic a t ion
error
• Open fuse • Replace blown
fuse
• Com m unication
error
• C hec k fo r sh orts
in low vo lta g e
wirin g in m odular
blower/system
• R eset netw ork by
depressing learn
button
• Check data 1/
d ata 2 vo lta ges
• Broken/
disconnected data
wire(s)
• Check
co mm unication s
wiring (data 1/ data
2 wires)
• Turn power OFF
prior to repair
• Mo dular blow er is
installed as a
le g a c y / tra d it io n al
system
• Check wire
connections at
terminal block
• V erify wires a t
term inal blocks are
s ec urely tw isted
together prior to
inserting in to
term inal block
• Verify mo dular
blower installation
type (legacy/
traditional or
co mm unicating )
• Check data 1/
data 2 voltages
Rapid Flashing • Normal network
traffic
• Con trol is
“talking” on
network as
expected
• None • No ne
• Data 1 and data 2
w ire s re ve rse d at
modular blower
thermostat, or
CT™ compatible
outdoor AC /HP
• Check
co mm unication s
wiring (data 1/ data
2 wires)
• Tu rn po wer O FF
prior to
repa ir
• Sh ort b etw e en
data 1 and data 2
wires
• Check wire
connections at
terminal block
• V erify wires a t
term inal blocks are
s ec urely tw isted
together prior to
inserting in to
term inal block
• Sh ort b etw e en
data 1 or data 2
wires and R (24
VAC) or C (24 VAC
comm on)
• Check data 1/
data 2 voltages
• None
Green Receive
LED
Off • Turn power OFF
prior to repair
1 Steady Flash • No network found
O n S olid • D a ta 1/ D a ta 2
miss-wire
Red
Com m unica tions
LED
• Depre ss Learn
Button
2 Flashes • Out-of-box reset • None
1 Flash • Communication
Failure
• Com m unication
Failure
NETWORK TROUBLESHOOTING CHART