Carrier 58MVP instruction manual Status Code Example, → ÐService Label/Fault Code Instructions

34IGNITION PROVING FAULT - Control will try three more times before a lockout #14 occurs. Check for: - Gas valve defective or gas valve turned "OFF".

- Defective Hot Surface Ignitor	- Manual valve shut-off.
- Low inlet gas pressure	- Flame sensor must be ungrounded.

-Green wire MUST be connected to furnace sheet metal.

-Proper flame sense microamps (.5 microamps D.C. minimum, 4.0 - 6.0 nominal in HIGH HEAT)

- Inadequate flame carryover or rough ignition.- Control ground continuity - Oxide buildup on flame sensor (clean with fine steel wool.)

41BLOWER OUTSIDE VALID SPEED RANGE - Indicates the blower is not operating at the calculated RPM. If this fault occurs in conjunction with fault #44 check wiring to motor otherwise refer to

the trouble-shooting guide.

42INDUCER OUTSIDE VALID SPEED RANGE - Indicates the inducer is not operating at the calculated RPM, or has not started within 10 seconds after a call for heat. Check wiring to motor otherwise refer to the trouble-shooting guide.

43PRESSURE SWITCH CALIBRATION FAULT- Indicates the low and high pressure switch "make" points during high heat purge are not within the calibration range.

Check for: - Plugged condensate drain.

-Water in vent piping, possibly sagging pipe.

-Improper pressure switch wiring or pressure switch tubing connections.

-Failed or "Out of Calibration" pressure switches.

44BLOWER CALIBRATION FAULT - Indicates the calculated blower speed is below 250 or above 1300 RPM. Unit will default to low or high heat mode if possible. If this fault occurs in conjunction with fault #41 check wiring to motor otherwise refer to the trouble-shooting guide. If this fault occurs by itself check for undersized ductwork, or excessive static caused by a dirty filter, or closed registers.

STATUS CODE EXAMPLE

		RED LED1			RED LED2
		EMER HEAT			MICROPROCESSOR
					MALFUNCTION
SETUP SW,(SW1-8)	OFF	1		1
		OFF OFF 2 3 4 5 6 7 8	1 2 3 1 2 3
				2
				3	DEHUM
				4	FUSE	DE	W2	COM	W/W1 Y/Y2	R	G
								24 V

YELLOW LED3	COUNT THE NO.	COUNT THE NO.
	OF FLASHES
		OF FLASHES
HIGH HEAT

GREEN LED4	(4)	(2) =	42 FAULT
LOW HEAT			INDUCER OUTSIDE VALID
			SPEED RANGE

COMPONENT TEST

To initiate the component test sequence, shut "OFF" the room thermostat or disconnect the "R"
thermostat lead. Put setup switch "SW-6" in the "ON" position to start the component test sequenceHUM		.
Once initiated the main board will turn "ON" the inducer motor-low speed, inducer motor-high speed,
hot surface ignitor, blower motor-low speed, and blower motor-high speed for 15-20 seconds each.
When component test is completed one or more of the following codes will flash. Gas Valve and
Humidifier will not be turned on.
CODE	DESCRIPTION

11Indicates inducer and blower motor tested OK. Visual check of hot surface ignitor required.

22SETUP ERROR - Same as code 22 above.

41BLOWER OUTSIDE VALID SPEED RANGE - Indicates blower motor failed test. Check blower, wiring, and control center.

42INDUCER OUTSIDE VALID SPEED RANGE - Indicates inducer motor failed test. Check inducer, wiring and control center.

To repeat component test turn setup switch "SW-6" "OFF" and then back "ON". After component test is completed put setup switch "SW-6" in the "OFF" position and reconnect the "R" thermostat lead.

320624-101 REV. J

A99243

A99243b

→Fig. 4ÐService Label/Fault Code Instructions

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