System Troubleshooting; Normal Sequence Of Operation; Power Up; Heating Mode - Goodman ComfortNet GCVC95 Series Installation Instructions Manual

LED
Off
1 Flash
Red
Communications
LED
2 Flashes
Off
1 Steady
Flash
Green Receive
LED
Rapid
Flashing
On Solid
S T
YSTEM ROUBLESHOOTING
NOTE: Refer to the instructions accompanying the ComfortNet
compatible outdoor AC/HP unit for troubleshooting information.
Refer to the Troubleshooting Chart in the back of this manual for
a listing of possible furnace error codes, possible causes and
corrective actions.
N S
ORMAL EQUENCE OF
P U
OWER P
The normal power up sequence is as follows:
•
115 VAC power applied to furnace.
•
Integrated control module performs internal checks.
Integrated control module displays 8 8 8 8 8 8 8 8 8 8 on dual 7-segment
•
display LED's.
Description Possible Cause
Normal condition None
Communications Communications
Failure Failure
Out-of-box reset •Control power up
•Learn button depressed
•Nopower •No power to furnace
•Communications •Open fuse
error
•Communications error
No network •Broken/ disconnected
data wire(s)
found
•Furnace is installed
as a legacy/ traditional
system
Normal network Control is "talking" on
traffc network as expected
Data 1/ Data 2 •Data 1 and data 2 wires
miss-wire reversed at furnace,
thermostat, or CT™
compatible outdoor AC/
HP
•Short between data 1
and data 2 wires
•Short between data 1
or data 2 wires and R
(24VAC) or C (24VAC
common)
O
PERATION
Corrective Action
None
•Depress Learn Button
•Verify that bus BIAS and
TERM dipswitches are in
the ON position.
None
•Check fuses and circuit
breakers; replace/reset
•Replace blown fuse
•Check for shorts in low
voltage wiring in furnace/
system
•Reset network by
depressing learn button
•Check data 1/ data 2
voltages
•Check communications
wiring (data 1/ data 2
wires)
•Check wire connections
at terminal block
•Verify furnace installation
type (legacy/ traditional
or communicating) Check
data 1/ data 2 voltages
None
•Check communications
wiring (data 1/ data 2
wires)
•Check wire connections
at terminal block
•Check data 1/ data 2
voltages
•
Integrated control module monitors safety circuits
continuously.
•
Furnace awaits call from thermostat. Dual 7-segment LED's
display O O O O O while awaiting call from thermostat.
H M
EATING ODE
The normal operational sequence in heating mode is as follows:
•
R and W1 (or R and W1/W2) thermostat contacts close,
initiating a call for heat.
•
Integrated control module performs safety circuit checks.
•
Induced draft blower is energized on high speed for a 15-
second prepurge. Humidifier terminal is energized with
induced draft blower.
•
Induced draft blower steps to low speed following prepurge.
Low stage pressure switch contacts are closed.
48
Comments
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