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Table 27: Unit Control Board Flash Codes
Flash Code
On Steady
Control Failure - Replace Control
Heart Beat
Normal Operation
1 Flash
Not Applicable
2 Flashes
Control waiting ASCD
3 Flashes
HPS1 - Compressor Lock out
5 Flashes
LPS1 - Compressor Lock out
7 Flashes
FS1 - Compressor Lock out
Ignition Control Locked Out/
9 Flashes
Ignition Control Failure / Limit Switch Trip / No
Jumper Plug in Heat Section
Compressors Locked Out On Low
10 Flashes
Outdoor Air Temperature
Compressors Locked Out Because The
11 Flashes
Economizer Is Using Free Cooling
13 Flashes
Compressor Held Off Due To Low Voltage
14 Flashes
EEPROM Storage Failure (Control Failure)
OFF
No Power or Control Failure
1. These flash codes do not represent alarms.
Subject to change without notice. Printed in U.S.A.
Copyright © 2011 by Johnson Controls, Inc. All rights reserved.
Description
1
1
1
1
Johnson Controls Unitary Products
5005 York Drive
Norman, OK 73069
Table 28: Ignition Control Flash Codes
Flashes
Fault Conditions
Steady On
Control Failure
Heartbeat
Normal Operation
1
Not Applicable
Pressure Switch
2
Stuck Closed
Pressure Switch Failed
3
To Close
4
Limit Switch Open
Flame Present With Gas
Off First Stage Gas Valve
Energized With W1 Off
5
Second Stage Gas Valve
Energized With First
Stage
Gas Valve Off
6
Ignition Lockout
No Power Or Control
Steady Off
Failure
Check
Control
Pressure Switch
Venter Pressure
Switch
Vent Blocked
Main Limit
AUX Limit
Gas Valve
Gas Flow
Gas Pressure
Gas Valve
Flame Sensor
24VAC or Control
689670-BIM-A-0311
Supersedes: 527728-BIM-D-1210
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