Carrier 48TC*D08 - Manual (Page 29)

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125,000/90,000 BTUH INPUT
180,000/120,000 BTUH INPUT
240,000/180,000 BTUH INPUT
250,000/200,000 BTUH INPUT
C08447
Fig. 37 -- Spark Adjustment (08--14)
Burner Ignition
Unit is equipped with a direct spark ignition 100% lockout
system. Integrated Gas Unit Controller (IGC) is located in
the control box. (See Fig. 36.) The IGC contains a
self--diagnostic LED (light--emitting diode). A single LED
(see Fig. 39) 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 9 for an explanation of LED error code
descriptions.
If lockout occurs, unit may be reset by interrupting power
supply to unit for at least 5 seconds.
Table 9 – 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
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.
IMPORTANT: Refer to Troubleshooting Tables 13 and
14 for additional information.
48TC