Bryant 393AAV instruction manual Wiring Diagrams, Troubleshooting

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.

WARNING: Blower access door switch opens 115-v power to control. No component operation can occur. Caution must be taken when manually closing this switch for service purposes. Failure to follow this warning could result in personal injury or death.

d.BRIEFLY short (jumper) TEST, 3/16 in. quick connect terminal on control (adjacent to LED status light), and COM-24V terminal on furnace control thermostat termi- nal block. (See Fig. 6.)

NOTE: If TEST to COM-24V terminals are jumpered longer than 2 sec, LED will flash rapidly, and test request will be ignored.

e. Component Test will function as described in item 2 above.

f.Check LED status.

g.If LED status indicates proper operation, RELEASE BLOWER ACCESS DOOR SWITCH, replace blower access door, and replace control access door.

WIRING DIAGRAMS

Refer to Fig. 5, 6, and 7 for wiring diagrams.

TROUBLESHOOTING

Refer to service label. (See Fig. 8.) The Troubleshooting Guide can be a useful tool in isolating furnace operation problems. Beginning with the word ªStart,º 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.

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