Bryant Ð Burner Section Details IX. LIMIT SWITCH, Ð Cooling Charging Chart, 581B060

INDUCED-	ROLLOUT
DRAFT	SWITCH
MOTOR
MOUNTING
PLATE

BURNER
SECTION	FLUE
	EXHAUST
INDUCED-
DRAFT	BLOWER
MOTOR
	HOUSING
MANIFOLD	GAS
PRESSURE
TAP	VALVE

Fig. 43 Ð Burner Section Details

IX. LIMIT SWITCH

Remove blower access panel (Fig. 2). Limit switch is located on the fan deck.

Fig. 41 Ð Cooling Charging Chart, 581B060

X. BURNER IGNITION

Fig. 42 Ð Cooling Charging Chart, 581B072

4.Slide the motor and blower wheel assembly out of the blower housing. The blower wheel can be cleaned at this point. If additional cleaning is required, continue with steps 5 and 6.

5. To remove blower from the motor shaft, remove

2 setscrews.

6.To remove motor, remove 4 screws that hold the motor to mounting plate. Remove the motor cooling fan by removing one setscrew. Then remove nuts that hold motor to mounting plate.

Unit is equipped with a direct spark ignition 100% lockout system. Integrated Gas Unit Controller (IGC) is located in the control box (Fig. 15). The IGC contains a self-diagnostic LED (light-emitting diode). A single LED on the IGC pro- vides a visual display of operational or sequential problems when the power supply is uninterrupted. When a break in power occurs, the IGC will be reset (resulting in a loss of fault history). The indoor (evaporator) fan ON/OFF times will also be reset. The LED error code can be observed through the viewport. During servicing refer to the label on the control box cover or Table 17 for an explanation of LED error code descriptions.

If lockout occurs, unit may be reset by interrupting the power supply to unit for at least 5 seconds.

CAUTION: When servicing gas train, do not hit or plug ori®ce spuds.

Table 17 Ð LED Error Code Description*

LED INDICATION	ERROR CODE DESCRIPTION
ON	Normal Operation
OFF	Hardware Failure
1 Flash²	Evaporator Fan On/Off Delay Modi®ed
2 Flashes	Limit Switch Fault
3 Flashes	Flame Sense Fault
4 Flashes	4 Consecutive Limit Switch Faults
5 Flashes	Ignition Lockout Fault
6 Flashes	Induced-Draft Motor Fault
7 Flashes	Rollout Switch Fault
8 Flashes	Internal Control Fault

LEGEND

LED Ð Light-Emitting Diode

*A 3-second pause exists between LED error code ¯ashes. If more than one error code exists, all applicable codes will be displayed in numeri- cal sequence.

²Indicates a code that is not an error. The unit will continue to operate when this code is displayed.

IMPORTANT: Refer to Troubleshooting Tables 18-22 for additional information.

7. To reinstall, reverse the procedure outlined above.

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