International comfort products A Series Installation Instructions Manual page 52

General
These instructions are written as if the furnace is installed in an
upflow application. An upflow furnace application is where the
blower is located below the combustion and controls section of the
furnace, and conditioned air is discharged upward. Since this
furnace can be installed in any of the 3 positions (Fig. 4), you must
revise your orientation to component location accordingly.
WARNING
!
FIRE, INJURY OR DEATH HAZARD
Failure to follow this warning could result in personal
injury, death and/or property damage.
The ability to properly perform maintenance on this
equipment requires certain knowledge, mechanical skills,
tools, and equipment. If you do not possess these, do not
attempt to perform any service and maintenance on this
equipment other than those procedures recommended in the
Owner's Manual.
CAUTION
!
ENVIRONMENTAL HAZARD
Failure to follow this caution may result in environmental
pollution.
Remove and recycle all components or materials (i.e. oil,
refrigerant, control board, etc.) before unit final disposal.
WARNING
!
ELECTRICAL SHOCK, FIRE OR EXPLOSION
HAZARD
Failure to follow this warning could result in personal
injury or death, or property damage.
Before installing, modifying, or servicing system, main
electrical disconnect switch must be in the OFF position and
install a lockout tag. There may be more than one
disconnect switch. Lock out and tag switch with a suitable
warning label. Verify proper operation after servicing.
Always reinstall access doors after completing service and
maintenance.
CAUTION
!
ELECTRICAL OPERATION HAZARD
Failure to follow this caution may result in improper
furnace operation or failure of furnace.
Label all wires prior to disconnection when servicing
controls. Wiring errors can cause improper and dangerous
operation.
CAUTION
!
ENVIRONMENTAL HAZARD
Failure to follow this caution may result in environmental
pollution.
Remove and recycle all components or materials (i.e. oil,
refrigerant, control board, etc.) before unit final disposal.
52
Electrical Controls and Wiring
ELECTRICAL OPERATION HAZARD
Failure to follow this warning could result in personal
injury or death.
There may be more than one electrical supply to the
furnace. Check accessories and cooling unit for additional
electrical supplies that must be shut off during furnace
servicing. Lock out and tag switch with a suitable warning
label.
The electrical ground and polarity for 115- -v wiring must be
properly maintained. See field wiring information (Fig. 40) and for
furnace wiring information (Fig. 68).
NOTE: If the polarity is not correct, the STATUS LED on the
control will flash rapidly RED and prevent the furnace from
heating. The control system also requires an earth ground for
proper operation of the control and flame- -sensing electrode.
The 24- -v circuit contains an automotive- -type, 3- -amp. fuse located
on the control. (Fig. 68) Any shorts of the 24- -v wiring during
installation, service, or maintenance will cause this fuse to blow. If
fuse replacement is required, use ONLY a 3- -amp. fuse. The control
LED will display a three flash AMBER code when fuse needs to
be replaced.
Proper instrumentation is required to service electrical controls.
The control in this furnace is equipped with a multi- -colored Status
Code LED (Light- -Emitting Diode) to aid in installation, servicing,
and troubleshooting. The furnace control LED is either ON
continuously, rapid flashing, or displaying a flash code in one of
three colors (Red, Green, or Amber).
For an explanation of status codes, refer to service booklet located
on blower access door (Fig. 63), or the Service guide at the end of
this manual.
The stored status code will not be erased from the control memory,
if 115- - or 24- -v power is interrupted.
1. To retrieve status code, proceed with the following:
NOTE: NO thermostat signal may be present at control, and all
blower- -OFF delays must be completed.
a. Remove blower access door.
b. Close blower door interlock switch.
c. Depress and hold SW1 button once (for less than 5
2. When above items have been completed, the LED flashes
the fault code history (up to 5 fault codes from newest to
oldest). Record the status code(s) for further troubleshoot-
ing.
3. Check LED status. If no previous faults in the history, con-
trol will rapidly flash the LED GREEN.
Specifications subject to change without notice.
WARNING
!
seconds).
440 01 4601 01