Bryant manual MODEL 345MAV DIAGNOSTIC CHART, See Fig

vice, you will have ready access to the information needed by your service representative.

This furnace has an LED operation and fault code display to aid the installer, service technician, or home- owner while installing or servicing the

unit. The LED code can be seen by removing the access door and viewing LED(s) through the view port in the blower access panel.

NOTE: Removing the blower access panel or turning off the 115-v electrical

power supply will terminate LED diag- nostic code display.

To decipher the meaning of the LED code, and suggested action, the follow- ing cross-reference can be used.

MODEL 345MAV DIAGNOSTIC CHART

			(See Fig. 2.)
FAULT
CODE	FAULT CODE DESCRIPTION	CHECKLIST
13 or 33	Limit Switch Lockout		Check for dirty air filter.
			Check for blocked return-air or supply-air grilles.
			Check to be sure manual shutoff valve in gas supply pipe is in the open position. (Follow
			start-up procedure if you open gas line.)
14 or 34	Ignition Lockout or		NOTE: Turn off the electrical supply and remove access doors before continuing with this
	Ignition Proving Fault		checklist.
			Check to be sure control switch or knob on gas valve is in ON position. (Follow start-up
			procedures if you must reset switch or knob to ON position.)
24	Furnace Fuse Open		Check for blown fuse and possible short in 24-v wiring.
			Check to make sure that all PVC pipes leading into the combustion-air intake and vent/
31	Pressure Switch Not Closed		exhaust are free from any cracks and sags. Also check the combustion-air intake adjacent to
			the furnace and vent/exhaust pipe on the outside of your home for blockage.
12, 21, 22,	Any Other Fault Code		Call dealer for service.
or 23
No Fault	Furnace Fails to Operate and No		Check thermostat for proper temperature setting.
Code			Check for blown fuses and circuit breakers.
	Fault is Signaled
Signaled			Check to be sure blower access panel is properly in place.

NOTES:

1.Light on continuously means control has power and working properly.

2.The fault code is a 2 digit number. The first digit is determined by the number of short flashes of the light and the second digit is determined by number of long flashes of the light.

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