35
LEGEND
NOTES:
1. There is a 3-second pause between alarm code displays.
2. If more than one alarm code exists, all applicable alarm codes will
be displayed in numerical se
q
uence.
3. Alarm codes on the IGC will be lost if power to the unit is
interrupted.
Table 13 — IGC Board LED Alarm Codes
LED
FLASH
CODE
DESCRIPTION
ACTION TAKEN BY
CONTROL
RESET METHOD
PROBABLE CAUSE
On
Normal Operation
—
—
—
Off
Hardware Failure
No gas heating.
—
Loss of power to the IGC. Check 5 amp fuse
on IGC, power to unit, 24V circuit breaker,
transformer, and wiring to the IGC.
2 Flashes
Limit Switch Fault
Gas valve and igniter Off.
Indoor fan and inducer On.
Limit switch closed, or heat
call (W) Off.
High temperature limit switch is open. Check
the operation of the indoor (evaporator) fan
motor.
Ensure that the supply-air temperature rise is
within the range on the unit name-plate.
Check wiring and limit switch operation.
3 Flashes
Flame Sense Fault
Indoor fan and inducer On.
Flame sense normal.
Power reset for LED reset.
The IGC sensed a flame when the gas valve
should be closed. Check wiring, flame
sensor, and gas valve operation.
4 Flashes
Four Consecutive Limit
Switch Fault
No gas heating.
Heat call (W) Off. Power
reset for LED reset.
4 consecutive limit switch faults within a
single call for heat. See Limit Switch Fault.
5 Flashes
Ignition Fault
No gas heating.
Heat call (W) Off. Power
reset for LED reset.
Unit unsuccessfully attempted ignition for 15
minutes. Check igniter and flame sensor
electrode spacing, gaps, etc. Check flame
sense and igniter wiring. Check gas valve
operation and gas supply. Check gas valve
connections to IGC terminals. BRN lead
must be on Pin 11.
6 Flashes
Induced Draft Motor Fault
If heat off: no gas heating.
If heat on: gas valve Off and
inducer On.
Inducer sense normal, or
heat call (W) Off.
Inducer sense On when heat call Off, or
inducer sense Off when heat call On.
Check wiring, voltage, and operation of IGC
motor. Check speed sensor wiring to IGC.
7 Flashes
Rollout Switch Lockout
Gas valve and igniter Off.
Indoor fan and inducer On.
Power reset.
Rollout switch has opened. Check gas valve
operation. Check induced-draft blower wheel
is properly secured to motor shaft.
8 Flashes
Internal Control Lockout
No gas heating.
Power reset.
IGC has sensed internal hardware or
software error. If fault is not cleared by
resetting 24 v power, replace the IGC.
9 Flashes
Temporary Software Lockout No gas heating.
1 hour auto reset, or power
reset.
Electrical interference is disrupting the IGC
software.
IGC
—
Integrated Gas Unit Control
LED
—
Light-Emitting Diode
Содержание 48GC04
Страница 18: ...18 Fig 31 Condenser Fan Assembly Screw Pattern Sequence 1 2 3 4 5 NO SCREW Blank Tab...
Страница 33: ...33 Fig 57 Integrated Gas Control IGC Board RED LED STATUS...
Страница 96: ...96 APPENDIX D WIRING DIAGRAMS Fig E 48GC 04 06 208 230 1 60 Unit with RTU Open Controller...
Страница 97: ...97 APPENDIX D WIRING DIAGRAMS Fig F 48GC 04 06 208 230 3 60 Unit with RTU Open Controller...
Страница 98: ...98 APPENDIX D WIRING DIAGRAMS Fig G 48GC 04 06 460 575 3 60 Unit with RTU Open Controller...
Страница 99: ...99 APPENDIX D WIRING DIAGRAMS Fig H 48GC 04 06 Power Wiring Diagram 208 230 1 60...
Страница 100: ...100 APPENDIX D WIRING DIAGRAMS Fig I 48GC 04 06 Power Wiring Diagram 208 230 3 60...
Страница 101: ...101 APPENDIX D WIRING DIAGRAMS Fig J 48GC 04 06 Power Wiring Diagram 460 575 3 60...
Страница 102: ...102 APPENDIX D WIRING DIAGRAMS Fig K 48GC 04 06 SystemVu Control Wiring Diagram All Voltages...
Страница 103: ...103 APPENDIX D WIRING DIAGRAMS Fig L 48GC 04 06 SystemVu Power Wiring Diagram 208 230 1 60...
Страница 104: ...104 APPENDIX D WIRING DIAGRAMS Fig M 48GC 04 06 SystemVu Power Wiring Diagram 208 230 3 60...
Страница 105: ...105 APPENDIX D WIRING DIAGRAMS Fig N 48GC 04 06 SystemVu Power Wiring Diagram 460 575 3 60...
