Carrier 48LC Series Service And Maintenance Instructions page 28

Table 8 – LED Error Code Description*
LED INDICATION
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.
Single Stage
ERROR CODE
DESCRIPTION
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
Fig. 39 - - Gas Valves
IMPORTANT: Refer to Troubleshooting Table 13 and
Table 14 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 via Carrier RCD. See
Table 10 for available orifice sizes. See Table 11 and
Table 12 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. 35.
2 Stage
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