Bryant 330JAV, 331JAV instruction manual Wiring Diagrams, Troubleshooting

FIELD 24-V WIRING

FIELD 115-, 208/230-, 460-V WIRING

FACTORY 24-V WIRING

FACTORY 115-V WIRING

2-STAGE THERMOSTAT TERMINALS

SEVEN WIRE

W2 W1 Y2 R G Y1 C

FIELD-SUPPLIED FUSED DISCONNECT

		THREE-WIRE					208/230- OR
		HEATING-
							460-V
		ONLY
							THREE
BLK	BLK		W2				PHASE
					GND
							GND
WHT	WHT		COM
			W/W1				208/230-V
	GND	GND			C		SINGLE
115-V FUSED		JUNCTION	Y/Y2				PHASE
					Y1
DISCONNECT		BOX				GND
			R		Y2		GND
	SWITCH	CONTROL			2-SPEED
(WHEN REQUIRED)		BOX	G
					CONDENSING
			24-V		UNIT
		TERMINAL
		BLOCK		NOTES: 1. Connect Y-terminal as shown for proper operation.
		FURNACE
				2.	Some thermostats require a "C" terminal connection as shown.
				3. If any of the original wire, as supplied, must be replaced,
					use same type or equivalent wire.

A99072

Fig. 10—Heating and Cooling Application Wiring Diagram for 2-Stage Thermostats and/or 2-Speed Condensing Units

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.) Refer to service label on blower compartment door for code explanations and useful troubleshooting suggestions. (See Fig. 12.)

It is important to note that power to furnace must not be interrupted and furnace blower door must not be removed until the LED status code(s) is recorded. When power to control is interrupted, status memory is erased.

The control will store up to 5 previous codes but will not store non-current codes longer than 48 hr. To retrieve previous codes, if present, no thermostat inputs to control must be present and all time delays must expire. Remove 1 of the red main limit wires 1 to 4 sec until the LED light goes out, then reconnect it. (See Fig. 5 and 6.) (Do not leave red wire disconnected for longer than 4 sec as control will assume an overtemperature condition exists and will respond with indoor blower operation.) This places control in status recall mode and displays first code stored in memory. Record code and repeat the disconnect and reconnect of red wire, recording each code until code 11 is displayed indicating no additional faults. After last code is displayed or after 2 minutes in the code recall mode, the control will return to normal standby mode.

Use any recorded fault codes, service label, and troubleshooting diagram on following pages to diagnose and correct any problem condition.

WIRING DIAGRAMS

Refer to Fig. 9, 10, and 11 for appropriate wiring diagrams.

TROUBLESHOOTING

Refer to service label. (See Fig. 12.) The Troubleshooting Guide can be a useful tool in isolating furnace operation problems. Beginning with the word “Start,” answer each question and follow the appropriate arrow to the next item.

The Guide will help you identify the problem or failed component. After replacing any component, verify correct operation sequence. More information is available in a seperate Troubleshooting Guide for 2-stage Gas-Fired Induced-Combustion Furnaces.

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