Goodman DVC80603B, Руководство по установке

Страница: 34 / 48

34
H
EATING
M
ODE
The normal operational sequence in heating mode is as fol-
lows:
•
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.
•
Igniter warm up begins upon step to low speed and
presence of closed low stage pressure switch contacts.
N
ORMAL
S
EQUENCE OF
O
PERATION
P
OWER
U
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
88888 88888
on dual 7-segment
display LED’s.
•
Integrated control module monitors safety circuits
continuously.
•
Furnace awaits call from thermostat. Dual 7-segment
LED’s display
OOOOO
while awaiting call from thermostat.
LED LED
Status
Indication Possible Causes Corrective Action(s) Notes & Cautions
Off
• Normal condition • None • None • None
1 Flash • Communications
Failure
• Communications
Failure
Depress Learn Button
• Verify that bus BIAS
and TERM
dipswitches are in the
ON position.
• Depress once
quickly for a power-
up reset
• Depress and hold
for 2 seconds for
an out-of-box reset
Red
Communications
LED
2 Flashes
• Out-of-box reset
• Control power up
• Learn button
depressed
• None • None
Off
• No power
• Communications
error
No power to furnace
• Open fuse
• Communications error
• 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
• Turn power OFF
prior to repair
1 Steady
Flash
• No network found • Broken/ disconnected
data wire(s)
• Furnace is installed as
a non communicating /
traditional system
• Check
communications
wiring (data 1/ data 2
wires)
• Check wire
connections at
terminal block
• Verify furnace
installation type
(non communicating /
traditional
• Check data 1/ data 2
• 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
Green Receive
LED
voltages
or communicating)
Rapid
Flashing
• Normal network
traffic
• Control is “talking” on
network as expected
• None • None
On Solid
• Data 1/ Data 2
miss-wire
• Data 1 and data 2
wires reversed at
furnace, thermostat,
or ComfortNet
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)
• Check
communications
wiring (data 1/ data 2
wires)
• Check wire
connections at
terminal block
• Check data 1/ data 2
voltages
• 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
compatible