Carrier 58YAV instruction manual ÐFurnace Control

BLOWER OFF DELAY

ADJUSTMENT SWITCH

	G	24-V THERMOSTAT
		TERMINALS
	R
	Y
TEST/TWIN	W	HUMIDIFIER TERMINAL
	Com
	24V	(24-VAC 0.5 AMP MAX)
	HUM	LED OPERATION &
		DIAGNOSTIC LIGHT
		HARNESS CONNECTOR
SEC-1		24-V TRANSFORMER SEC-2
3-AMP FUSE		SPARE-1
COOL
		BLOWER SPEED
HEAT
		SELECTION TERMINALS
		SPARE-2
		EAC-1 (BLACK)

EAC-ELECTRONIC AIR CLEANER

TERMINALS (115-VAC 1 AMP MAX)

115-VAC (L1)	EAC-2 (WHITE)
POWER SUPPLY	115-VAC (L2) NEUTRAL
	CONNECTION
HOT SURFACE	INDUCER MOTOR
IGNITOR CONNECTOR	CONNECTOR

A00292

Fig. 7ÐFurnace Control

through the sight glass or window on the blower access door. The control indicates status with the LED on continuously, rapid flashing, or a code composed of 2 digits. (The first digit is the number of short flashes, the second is the number of longs flashes.)

For an explanation of status codes, refer to service label (See Fig. 8) located on blower access door or the Troubleshooting Guide.

The control stores 1 status code (the last status code to occur) for a period of 48 hr or until the 115- or 24-v power is interrupted. NOTE: Look into blower access door sight glass for current LED status BEFORE removing the blower access door. Removing blower access door will open blower access door switch and terminate 115-v power to control, and status code will be erased.

1.To retrieve status code, proceed with the following:

NOTE: NO thermostat signal shall be present at control, and all blower off delays must be completed.

a.Leave 115-v power to furnace turned on.

b.Look into blower access door sight glass for current LED status.

NOTE: Leave blower access panel installed to maintain power to control to view current LED status.

c.Remove control access door.

d.BRIEFLY remove either wire from the main limit switch until LED goes out, then reconnect it.

NOTE: If wire to main limit is disconnected longer than 4 sec, main blower starts, and retrieval request is ignored.

2.When above items have been completed, the following will occur:

a.LED flashes a status code 4 times. Record this status code for further troubleshooting.

b. Inducer motor starts and continues to run the entire component test.

c. Hot surface ignitor is energized for 15 sec, then de- energized.

d. Main blower operates at heating speed for 10 sec, then turns off.

e. Main blower operates at cooling speed for 10 sec, then turns off.

f. Inducer motor stops.

Items a through e above will assist in furnace troubleshooting since all components are functionally operated except the gas valve. This procedure is also referred to as ″Component Test.″

3.Operate furnace through 1 heat cycle to test for proper operation and check LED status.

4.If furnace is operating properly and LED indicates proper operation, replace control access door.

5.Component Test can also be initiated by performing the following:

a.Remove control access door.

b.Remove blower access door.

c.Manually close blower access door switch.

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