LED Troubleshooting Ð Error Code

SYMPTOM

CAUSE

REMEDY

 

 

 

Hardware failure.

Loss of power to control module

Check 5 amp fuse on IGC, power to unit, 24-v circuit

(LED OFF)

(IGC).

breaker, and transformer. Units without a 24-v circuit

 

 

breaker have an internal overload in the 24-v trans-

 

 

former. If the overload trips, allow 10 minutes for au-

 

 

tomatic reset.

Limit switch fault.

High temperature limit switch is

Check the operation of the indoor (evaporator) fan

(LED 2 ¯ashes)

open.

motor. Ensure that the supply-air temperature rise is

 

 

in accordance with the range on the unit nameplate.

Flame sense fault.

The IGC sensed ¯ame that

Reset unit. If problem persists, replace control board.

(LED 3 ¯ashes)

should not be present.

 

4 consecutive limit switch

Inadequate air¯ow to unit.

Check operation of indoor (evaporator) fan motor and

faults.

 

that supply-air temperature rise agrees with range on

(LED 4 ¯ashes)

 

unit nameplate information.

Ignition lockout.

Unit unsuccessfully attempted

Check ignitor and ¯ame sensor electrode spacing,

(LED 5 ¯ashes)

ignition for 15 minutes.

gaps, etc. Ensure that ¯ame sense and ignition wires

 

 

are properly terminated. Verify that unit is obtaining

 

 

proper amount of gas.

Induced-draft motor fault.

IGC does not sense that induced-

Check for proper voltage. If motor is operating, check

(LED 6 ¯ashes)

draft motor is operating.

the speed sensor plug/IGC Terminal J2 connection.

 

 

Proper connection: PIN 1 Ð White, PI N 2 Ð Red,

 

 

PIN 3 Ð Black.

Rollout switch fault.

Rollout switch has opened.

Rollout switch will automatically reset, but IGC will

(LED 7 ¯ashes)

 

continue to lockout unit. Check gas valve operation.

 

 

Ensure that induced-draft blower wheel is properly

 

 

secured to motor shaft. Reset unit at unit disconnect.

Internal control fault.

Microprocessor has sensed an

If error code is not cleared by resetting unit power,

(LED 8 ¯ashes)

error in the software or hardware.

replace the IGC.

WARNING: If the IGC must be replaced, be sure to ground yourself to dissipate any electrical charge that may be present before handling new control board. The IGC is sensitive to static electricity and may be damaged if the necessary precautions are not taken.

IMPORTANT: Refer to Heating troubleshooting chart for additional troubleshooting analysis.

LEGEND

IGC Ð Integrated Gas Unit Controller

LED Ð Light-Emitting Diode

SERVICE TRAINING

Packaged Service Training programs are an excellent way to increase your knowledge of the equip- ment discussed in this manual, including:

·

Unit Familiarization

·

Maintenance

·

Installation Overview

·

Operating Sequence

A large selection of product, theory, and skills programs are available, using popular video-based formats and materials. All include video and/or slides, plus companion book.

Classroom Service Training which includes ``hands-on'' experience with the products in our labs that can mean increased con®dence that really pays dividends in faster troubleshooting and fewer callbacks. Course descriptions and schedules are in our catalog.

CALL FOR FREE CATALOG 1-800-962-9212

[ ] Packaged Service Training [ ] Classroom Service Training

Copyright 1998 Bryant Heating & Cooling Systems

CATALOG NO. CATALOG NO. 5358-802

Page 50
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Bryant 588A, 589A user manual Led Off, Service Training

589A, 588A specifications

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