
42
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.
RTU Open Control System
For details on operating units equipped with the factory-in-
stalled RTU Open controller, refer to the
“Factory-Installed
RTU Open Multi-Protocol Controller Control, Start-Up, Oper-
ation and Troubleshooting”
manual.
ECONOMIZER SYSTEMS
The unit may be equipped with a factory-installed or accessory
(field-installed) economizer system. Two types are available:
with a logic control system (EconoMi$er
®
IV and EconoMi$er
X) and without a control system (EconoMi$er2). See Fig. 62-
64 for component locations on each type. See Fig. 65-68 for
economizer section wiring diagrams. The W7212 controller is
used for EconoMi$er IV and the W7220 controller is used for
EconoMi$er X.
All three economizers use direct-drive damper actuators.
See Table 21 for EconoMi$er IV input/output logic.
Fig. 62 — EconoMi$er IV Component Locations
Table 20 — 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
IMPORTANT: Any economizer that meets the economizer
requirements as laid out in California’s Title 24 mandatory
section 120.2 (fault detection and diagnostics) and/or pre-
scriptive section 140.4 (life-cycle tests, damper leakage,
5 year warranty, sensor accuracy, etc), will have a label on
the economizer. Any economizer without this label does
not meet California’s Title 24. The five year limited parts
warranty referred to in section 140.4 only applies to factory
installed economizers. Please refer to the economizer on
each unit.
Honeywell
HH79AH001
ECONOMI$ER X
HARNESS
OUTSIDE AIR
TEMPERATURE SENSOR
Summary of Contents for Preferred 581J04-14
Page 36: ...36 Fig 60 Integrated Gas Control IGC Board RED LED STATUS ...
Page 44: ...44 Fig 65 RTU Open Overlay for Economizer Wiring ...
Page 45: ...45 Fig 66 VFD Overlay for W2770 Controller Wiring ...
Page 100: ...100 Fig F 581J 08 09 YAC Control Diagram 208 230 3 60 460 575 3 60 APPENDIX D WIRING DIAGRAMS ...
Page 101: ...101 Fig G 581J 11YAC Control Diagram 208 230 3 60 460 575 3 60 APPENDIX D WIRING DIAGRAMS ...
Page 102: ...102 Fig H 581J 12 YAC Control Diagram 208 230 3 60 460 575 3 60 APPENDIX D WIRING DIAGRAMS ...
Page 103: ...103 Fig I 581J 04 06 YAC Power Diagram 208 230 1 60 APPENDIX D WIRING DIAGRAMS ...
Page 104: ...104 Fig J 581J 04 06 YAC Power Diagram 208 230 3 60 460 3 60 APPENDIX D WIRING DIAGRAMS ...
Page 105: ...105 Fig K 581J 04 06 YAC Power Diagram 575 3 60 APPENDIX D WIRING DIAGRAMS ...
Page 108: ...108 Fig N 581J 07 12A B C YAC Power Diagram 208 230 3 60 460 3 60 APPENDIX D WIRING DIAGRAMS ...
Page 109: ...109 Fig O 581J 07 12A B C YAC Power Diagram 575 3 60 APPENDIX D WIRING DIAGRAMS ...
Page 110: ...110 Fig P 581J 08 09 YAC Power Diagram 230 460 3 60 APPENDIX D WIRING DIAGRAMS ...
Page 111: ...111 Fig Q 581J 08 09 YAC Power Diagram 575 3 60 APPENDIX D WIRING DIAGRAMS ...
Page 112: ...112 Fig R 581J 11 YAC Power Diagram 208 230 3 60 APPENDIX D WIRING DIAGRAMS ...
Page 113: ...113 Fig S 581J 11 YAC Power Diagram 460 3 60 APPENDIX D WIRING DIAGRAMS ...
Page 114: ...114 Fig T 581J 11 YAC Power Diagram 575 3 60 APPENDIX D WIRING DIAGRAMS ...
Page 115: ...115 Fig U 581J 12 YAC Power Diagram 230 460 3 60 APPENDIX D WIRING DIAGRAMS ...
Page 116: ...116 Fig V 581J 12 YAC Power Diagram 575 3 60 APPENDIX D WIRING DIAGRAMS ...
Page 117: ...117 Fig W 581J 14 YAC Control Diagram 208 230 3 60 460 575 3 60 APPENDIX D WIRING DIAGRAMS ...
Page 118: ...118 Fig X 581J 14 YAC Power Diagram 208 230 3 60 APPENDIX D WIRING DIAGRAMS ...
Page 119: ...119 Fig Y 581J 14 YAC Power Diagram 460 3 60 APPENDIX D WIRING DIAGRAMS ...
Page 120: ...120 Fig Z 581J 14 YAC Power Diagram 575 3 60 APPENDIX D WIRING DIAGRAMS ...
Page 143: ...143 Fig AW RTU Open Wiring Diagram APPENDIX D WIRING DIAGRAMS ...