Communications Troubleshooting Chart - Goodman AVPTC42D14 series Installation & Operating Instructions Manual

23 Communications Troubleshooting Chart

LED LED
Status
1 Flash
Red
Communications
LED
2 Flashes
1 Steady
Flash
Green Receive
LED
Rapid
Flashing
On Solid
Indication
• Normal condition
Off
• Communications
Failure
• Out-of-box reset
• No power
Off
• Communications
error
• No network found
• Normal network
traffic
• Data 1/ Data 2
miss-wire
Possible Causes Corrective Action(s)
• None • None
• Communications • Depress Learn Button
• Verify that bus BIAS
Failure
and TERM
dipswitches are in the
ON position.
• Control power up • None
• Learn button
depressed
• No power to air • Check fuses and
handler circuit breakers;
• Open fuse
replace/reset
• Replace blown fuse
• Communications error
• Check for shorts in
low voltage wiring in
air handler/system
• Reset network by
depressing learn
button
• Check data 1/ data 2
voltages
• Broken/ disconnected • Check
data wire(s) communications
• Air handler is installed
wiring (data 1/ data 2
as a legacy/ traditional wires)
• Check wire
system
connections at
terminal block
• Verify air handler
installation type
(legacy/ traditional or
communicating)
• Check data 1/ data 2
voltages
• Control is "talking" on • None
network as expected
• Data 1 and data 2 • Check
wires reversed at air communications
handler, thermostat, wiring (data 1/ data 2
or CT™ compatible wires)
• Check wire
outdoor AC/HP
• Short between data 1
connections at
and data 2 wires terminal block
• Short between data 1 • Check data 1/ data 2
or data 2 wires and R voltages
(24VAC) or C (24VAC
common)
22
Notes & Cautions
• None
• Depress once
quickly for a power-
up reset
• Depress and hold
for 2 seconds for
an out-of-box reset
• None
• Turn power OFF
prior to repair
• Turn power OFF
prior to repair
• Verify wires at
terminal blocks are
securely twisted
together prior to
inserting into
terminal block
• Verify data1 and
data voltages as
described above
• None
• Turn power OFF
prior to repair
• Verify wires at
terminal blocks are
securely twisted
together prior to
inserting into
terminal block
• Verify data1 and
data voltages as
described above