Carrier ZONEKIT2ZCAR ÐTroubleshooting, LED Codes Error Description Action Required

I	Red LEDÐDisplays ON when fan is energized.
J	Red LEDÐDisplays ON when first-stage cooling is
	energized.
K	Red LEDÐDisplays ON when second-stage cooling is
	energized.
L	Red LEDÐDisplays ON when reversing valve is ener-
	gized.

Red LEDÐDisplays ON when first-stage heat is M energized.

N	Red LEDÐDisplays ON when second-stage heat
	is energized.

J2 (Not Shown)ÐCut for 50 hz operation. Lo- O cated under plastic housing approximately 1 in.

above comprotec override.

→		Table 2ÐTroubleshooting
	LED CODES	ERROR DESCRIPTION	ACTION REQUIRED
	Green flashes 1 time every sec and no	Normal operation.	None.
	other LEDs are flashing.
			Wait until duct temperature cools below
	Green flashes 1 time and Red flashes 1	Duct temperature sensor. First-stage heat	exceeded temperature trip. (Heat leaving
			air temperature trip limits set at LAT limits
	time	limit exceeded; heat will be locked out.
			POT on central control circuit board; range
			is 110° to 175°F.)
	Green flashes 1 time and Red flashes 2	Duct temperature sensor. Second-stage	Wait until duct temperature cools below
			exceeded temperature trip. Range is 105°
	times	heat limit exceeded.
			to 155°F.
	Green flashes 1 time and Red flashes 3	Duct temperature sensor. First-stage cool	Wait until duct temperature raises above
	times	limit exceeded; cool will be locked out.	exceeded temperature trip (45°F).
	Green flashes 1 time and Red flashes 4	Duct temperature sensor. Second-stage	Wait until duct temperature raises above
	times	cool limit exceeded.	exceeded temperature trip (50°F).
	Green flashes 1 time and Red flashes 5	HP temperature sensor. First-stage heat	Wait until HP temperature cools below ex-
	times	limit exceeded; heat will be locked out.	ceeded temperature trip. Fixed at 110°F.
	Green flashes 2 times and Red flashes 1	HP temperature sensor error. Second-	Wait until HP temperature cools below ex-
	time	stage heat limit exceeded.	ceeded temperature trip. Fixed at 105°F.
	Green flashes 2 times and Red flashes 2	HP temperature sensor. First-stage cool	Wait until duct temperature raises above
	times	limit exceeded; cool will be locked out.	exceeded temperature trip (45°F).
	Green flashes 2 times and Red flashes 3	HP temperature sensor. Second-stage cool	Wait until duct temperature raises above
	times	limit exceeded.	exceeded temperature trip (50°F).
	Green flashes 2 times and Red flashes 4		1. Verify that duct temperature sensor or
		1. Duct temperature sensor.	10k ohm resistor is attached to control cen-
	times	2. Temperature sensor is shorted.	ter at duct temperature connectors.
			2. Replace duct temperature sensor.
	Green flashes 2 times and Red flashes 5		1. Verify that duct temperature sensor or
		1. Duct temperature sensor.	10k ohm resistor is attached to control cen-
	times	2. Temperature sensor is open.	ter at duct temperature connectors.
			2. Replace duct temperature sensor.
	Green flashes 3 times and Red flashes 1		1. Verify that HP temperature sensor or
		1. HP temperature sensor.	10k ohm resistor is attached to control cen-
	time	2. Temperature sensor is shorted.	ter at HP temperature connectors.
			2. Replace HP temperature sensor.
	Green flashes 3 times and Red flashes 2		1. Verify that HP temperature sensor or
		1. HP temperature sensor.	10k ohm resistor is attached to control cen-
	times	2. Temperature sensor is open.	ter at HP temperature connectors.
			2. Replace HP temperature sensor.
			1. Check for short circuits on damper wire
	Green flashes 3 times and Red flashes 3		connections at the dampers and control
		Damper fuse blown.	center.
	times		2. Replace damper fuse.
			3. Check damper operation, may need to
			be replaced.
	Green flashes 3 times and Red flashes 4	Fatal control center circuit board failure.	Replace control center.
	times

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