Carrier 58MVP Fault Code, ·Thermostat call with SW-1ON, ·Thermostat call with SW-6ON

Fault Code 22

SETUP ERRORÐThis fault indicates that setup switches SW-1 or SW-6 are ON when they should be OFF. The following combinations will cause the fault:

·Thermostat call with SW-1 ON.

·Thermostat call with SW-6 ON.

·SW-1 and SW-6 both ON together.

STEP	ACTION	YES	NO	GO TO
1.	Turn power off and remove blower access panel.	Ð	Ð	2
2.	Make sure thermostat is NOT calling for heating or cooling. Disconnect all thermostat terminal leads	Ð	Ð	3
	to make sure.
3.	Is setup switch SW-1 in ON position?	4	6	Ð
4.	Put setup switch SW-1 in OFF position.	Ð	Ð	5
5.	Go to page number indicated in Index for CLEANUP AND START-UP INSTRUCTIONS.	Ð	Ð	INDEX
6.	Is setup switch SW-6 in ON position?	7	8	Ð
7.	Put setup switch SW-6 in OFF position.	Ð	Ð	5
8.	Replace furnace control board.	Ð	Ð	5

Fault Code 23

INVALID BLOWER AIRFLOW SELECTIONÐThis fault indicates improper A/C or CF switch setting. The -14 units can deliver sufficient airflow for 1-1/2 to 3-1/2 tons A/C and 600 to 1400 CFM for continuous fan. The -20 unit can deliver sufficient airflow for 2 to 5 tons A/C and 800 to 2000 CFM for continuous fan. If fault code is flashing, unit still operates, but it defaults to closest allowable airflow.

NOTE: Boards with date codes of 9506 or later will flash fault code and set continuous fan airflow to same airflow as A/C if continuous fan is adjusted to a higher airflow than A/C setting.

STEP	ACTION	YES	NO	GO TO
1.	Turn power off and remove blower access panel.	Ð	Ð	2
2.	Are air conditioning select switches A/C set properly? (See Table 2.)	5	3	Ð
3.	Set air conditioning select switches A/C for proper tonnage as required by condensing unit.	Ð	Ð	4
4.	Go to page number indicated in Index for CLEANUP AND START-UP INSTRUCTIONS.	Ð	Ð	INDEX
5.	Are continuous fan select switches CF set properly? (See Table 3.)	7	6	Ð
6.	Set continuous fan select switches CF for desired airflow. This setting should normally be set to DE-
	FAULT position unless a 2-speed AC/HP is part of system. Use Table 4 for reference on 2-speed	Ð	Ð	4
	AC/HP airflow requirements.
7.	Are continuous fan select switches CF set to a higher airflow than air conditioning select switches	6	8	Ð
	A/C? (See Tables 2 and 3.)
8.	Is furnace a 100 size?	11	9	Ð
9.	The problem is in the A/C or CF selection circuit. The maximum cooling or continuous fan airflow for	Ð	Ð	10
	this unit will be delivered.
10.	Jiggle A/C and CF switches back and forth. If fault code continues to flash, replace furnace control	Ð	Ð	4
	board.
11.	The problem is in the A/C or CF selection circuit. The minimum cooling or continuous fan airflow for	Ð	Ð	12
	this unit will be delivered.
12.	Jiggle A/C and CF switches back and forth. If fault code continues to flash, replace furnace control	Ð	Ð	4
	board.

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