Intertek ACVC96 Service Instructions Manual page 55

SYSTEM OPERATION
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 for a listing of possible furnace error codes, possible causes and corrective actions.
LED LED
Status
Off
1 Flash
Red
Communications
LED
2 Flashes
Off
1 Steady
Flash
Green Receive
LED
Rapid
Flashing
On Solid
Indication Possible Causes
Normal condition None
Communications Communications
Failure Failure
Out-of-box reset Control power up
Learn button
depressed
No power No power to furnace
Communications Open fuse
error
Communications error
No network found Broken/ disconnected
data wire(s)
Furnace is installed as
a legacy/ traditional
system
Normal network Control is "talking" on
traffic network as expected
Data 1/ Data 2 Data 1 and data 2
miss-wire wires 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)
ComfortNet™ System
Corrective Action(s) Notes & Cautions
None None
Depress Learn Button Depress once
quickly for a power-
Verify that bus BIAS
up reset
and TERM
dipswitches are in the Depress and hold
ON position. for 2 seconds for
an out-of-box reset
None None
Check fuses and Turn power OFF
circuit breakers; prior to repair
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 Turn power OFF
communications prior to repair
wiring (data 1/ data 2
Verify wires at
wires)
terminal blocks are
Check wire securely twisted
connections at together prior to
terminal block inserting into
terminal block
Verify furnace
installation type Verify data1 and
(legacy/ traditional or data voltages as
communicating) described above
Check data 1/ data 2
voltages
None None
Check Turn power OFF
communications prior to repair
wiring (data 1/ data 2
Verify wires at
wires)
terminal blocks are
Check wire securely twisted
connections at together prior to
terminal block inserting into
terminal block
Check data 1/ data 2
voltages Verify data1 and
data voltages as
described above
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