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IGNITER AND SENSOR LOCATIONS
(BRACKET HEAT COVER NOT SHOWN FOR CLARITY)
SEE
DETAIL A
SEE DETAIL A
ON/OFF
SWITCH
NPT INLET
INLET
PRESSURE TAP
NPT OUTLET
SINGLE STAGE
Table 14 – LED Error Code Description*
LED INDICATION
ERROR CODE DESCRIPTION
ON
OFF
1 Flash{
Evaporator Fan On/Off Delay Modified
2 Flashes
3 Flashes
4 Flashes
4 Consecutive Limit Switch Faults
5 Flashes
6 Flashes
7 Flashes
8 Flashes
9 Flashes
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.
{ Indicates a code that is not an error. The unit will continue to
operate when this code is displayed.
SEE DETAIL A
Fig. 67 - - Spark Adjustment ( Size 16)
REGULATOR
COVER SCREW
PLASTIC ADJUST
SCREW
REGULATOR SPRING
(PROPANE - WHITE
NATURAL - SILVER)
GAS PRESSURE
REGULATOR
ADJUSTMENT
NPT OUTLET
MANIFOLD
PRESSURE TAP
Fig. 68 - - Gas Valves
Normal Operation
Hardware Failure
Limit Switch Fault
Flame Sense Fault
Ignition Lockout Fault
Induced --- Draft Motor Fault
Rollout Switch Fault
Internal Control Fault
Software Lockout
6 CELL
50TM400484
0.130 in. (3.3 mm)
8 CELL
50TM400485
10 CELL
50TM400439
ON/OFF
SWITCH
NPT INLET
INLET
PRESSURE TAP
NPT OUTLET
2 STAGE
IMPORTANT: Refer to Troubleshooting Table 24 and
Table 25 for additional information.
Orifice Replacement
This unit uses orifice type LH32RFnnn (where nnn
indicates orifice reference size). When replacing unit
orifices, order the necessary parts through Carrier RCD.
See Table 16 for available orifice sizes. See Table 17
through Table 20 for orifice sizes for Natural Gas and LP
fuel usage at various elevations above sea level.
Check that each replacement orifice is tight at its threads
into the manifold pipe and that orifice projection does not
exceed maximum value. See Fig. 62.
51
0.181 in. (4.6 mm)
A
DETAIL
C12593
REGULATOR
COVER SCREW (2)
PLASTIC ADJUST
SCREW (2)
REGULATOR SPRING (2)
(PROPANE - WHITE
NATURAL - SILVER)
LOW STAGE
GAS PRESSURE
REGULATOR
ADJUSTMENT
NPT OUTLET
MANIFOLD
PRESSURE TAP
C12066
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