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44
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 19 — 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 nameplate. Check wiring and limit switch
operation. Check/clean return air filters. Check burner
assembly manifold pressure to ensure proper firing rate.
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. The minimum flame sensing microamps is
0.5 ma. 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.
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. Check to ensure Hall Effect wires are not rubbing
against cabinet sheet metal.
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. Check gas valve connections to IGC terminals.
BRN lead must be on Pin 11. Check that W1, W2 and
Com are correctly connected to the gas valve terminals.
9 Flashes
Temporary Software
Lockout
No gas heating.
1 hour auto reset, or
power reset.
Electrical interference is disrupting the IGC software.
LEGEND
IGC
— Integrated Gas Unit Control
LED
— Light-Emitting Diode
Summary of Contents for WeatherMaster Puron 48HC D17
Page 18: ...18 COOLING CHARGING CHARTS Fig 22 Cooling Charging Chart 15 Ton ...
Page 19: ...19 Fig 23 Cooling Charging Chart 17 5 Ton ...
Page 20: ...20 Fig 24 Cooling Charging Chart 20 Ton ...
Page 21: ...21 Fig 25 Cooling Charging Chart 25 Ton ...
Page 37: ...37 Fig 48 Unit Control Box IGC Location IGC Board IGC Board Side view Front view ...
Page 40: ...40 Fig 51 Typical IGC Wiring Diagram ...
Page 46: ...46 Fig 57 RTU Open Overlay for Economizer Wiring ...
Page 47: ...47 Fig 58 VFD Overlay for W2770 Controller Wiring ...
Page 84: ...84 Fig B 48HC D17 D28 Control Diagram 208 230 3 60 460 575 3 60 ...
Page 85: ...85 Fig C 48HC D17 D28 Power Diagram 208 230 3 60 ...
Page 86: ...86 Fig D 48HC D17 D28 Power Diagram 460 3 60 ...
Page 87: ...87 Fig E 48HC D17 D28 Power Diagram 575 3 60 ...
Page 88: ...88 Fig F 48HC D17 D28 Control Diagram with Humidi MiZer System ...
Page 89: ...89 Fig G 48HC D17 D28 Power Diagram 208 230 3 60 with Humidi MiZer System ...
Page 90: ...90 Fig H 48HC D17 D28 Power Diagram 460 3 60 with Humidi MiZer System ...
Page 91: ...91 Fig I 48HC D17 D28 Power Diagram 575 3 60 with Humidi MiZer System ...
Page 92: ...92 Fig J PremierLink System Control Wiring Diagram 50HE500891 F ...
Page 93: ...93 Fig K PremierLink System Control Wiring Diagram with Humidi MiZer System ...
Page 94: ...94 Fig L RTU OPEN Wiring Diagram ...
Page 95: ...95 Fig M RTU OPEN Wiring Diagram with Humidi MiZer System ...
Page 97: ......