Carrier 48TC*D08 appendix Burner Ignition, LED Error Code Description

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)

48TC

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.

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