37
appearance, and that the flames are approximately the same
for each burner.
12. Turn off the unit, remove the pressure manometer and replace
the
1
/
8
-in. pipe fitting on the gas manifold. See Fig. 52.
Burner Ignition
The unit is equipped with a direct spark ignition 100% lockout
system. An Integrated Gas Unit Controller (IGC) is located in
the control box. See Fig. 53. See Fig. 56 for IGC typical wiring
diagram. The IGC contains a self-diagnostic LED (light-emitting
diode). A single LED (see Fig. 57) on the IGC provides a visual
display of operational or sequential problems when the power
supply is uninterrupted. When a break in power occurs, the IGC
will be reset, resulting in a loss of fault history, and the indoor
(evaporator) fan ON/OFF times will be reset. The LED error
code can be observed through the viewport. During servicing,
refer to the label on the control box cover or Table 13 for an ex
-
planation of LED error code descriptions. See Table 15 for a list
of the IGC Connections.
If lockout occurs, unit may be reset by interrupting power supply
to unit for at least 5 seconds.
LEGEND
LED
— Light Emitting Diode
* A 3-second pause exists between LED error code flashes. If more
than one error code exists, all applicable codes will be displayed in
numerical sequence.
Orifice Replacement
This unit uses orifice type LH32RFnnn (where nnn indicates ori
-
fice reference size). When replacing unit orifices, order the neces
-
sary parts through the Carrier Replacement Components Division
(RCD). See Table 14 for available orifice sizes. See Table 15 for
IGC connection sizes. See Tables 16 and 17 for orifice sizes for
Natural Gas and LP fuel usage at various elevations above sea lev
-
el. Never drill or plug orifices for operation.
Check that each replacement orifice is tight at its threads into the
manifold pipe and that orifice projection does not exceed maxi
-
mum value. See Fig. 50.
IMPORTANT: Refer to the Troubleshooting Tables 18 and
19 for additional information.
Table 13 —
LED Error Code Description*
LED INDICATION
ERROR CODE DESCRIPTION
ON
Normal Operation
OFF
Hardware Failure
2
Flashes Limit Switch Fault
3
Flashes Flame Sense Fault
4
Flashes 4 Consecutive Limit Switch Faults
5
Flashes Ignition Lockout Fault
6
Flashes Induced-Draft Motor Fault
7
Flashes Rollout Switch Fault
8
Flashes Internal Control Fault
9
Flashes Software Lockout
Содержание 48TC series
Страница 40: ...40 Fig 56 Typical IGC Wiring Diagram...
Страница 41: ...41 Fig 57 Integrated Gas Control IGC Board RED LED STATUS...
Страница 47: ...47 Fig 62 RTU Open Overlay for Economizer Wiring...
Страница 48: ...48 Fig 63 VFD Overlay for W2770 Controller Wiring...
Страница 96: ...96 Fig C 48TC D17 D30 Control Diagram 208 230 3 60 460 3 60 575 3 60 APPENDIX D WIRING DIAGRAMS...
Страница 97: ...97 Fig D 48TC D17 D30 Power Diagram 208 230 3 60 APPENDIX D WIRING DIAGRAMS...
Страница 98: ...98 Fig E 48TC D17 D30 Power Diagram 460 3 60 APPENDIX D WIRING DIAGRAMS...
Страница 99: ...99 Fig F 48TC D17 D30 Power Diagram 575 3 60 APPENDIX D WIRING DIAGRAMS...
Страница 100: ...100 Fig G 48TC D17 D30 Control Diagram with Humidi MiZer System APPENDIX D WIRING DIAGRAMS...
Страница 101: ...101 Fig H 48TC D17 D30 Power Diagram 208 230 3 60 with Humidi MiZer System APPENDIX D WIRING DIAGRAMS...
Страница 102: ...102 Fig I 48TC D17 D30 Power Diagram 460 3 60 with Humidi MiZer System APPENDIX D WIRING DIAGRAMS...
Страница 103: ...103 Fig J 48TC D17 D30 Power Diagram 575 3 60 with Humidi MiZer System APPENDIX D WIRING DIAGRAMS...
Страница 104: ...104 Fig K PremierLink System Control Wiring Diagram APPENDIX D WIRING DIAGRAMS...
Страница 105: ...105 Fig L PremierLink System Control Wiring Diagram with Humidi MiZer System APPENDIX D WIRING DIAGRAMS...
Страница 106: ...106 Fig M RTU OPEN Wiring Diagram APPENDIX D WIRING DIAGRAMS...
Страница 107: ...107 Fig N RTU OPEN Wiring Diagram with Humidi MiZer System APPENDIX D WIRING DIAGRAMS...
Страница 109: ......