349218-JIM-F-0512
62 Johnson Controls Unitary Products
Figure 31: Unit Control Board
Table 25: Unit Control Board Flash Codes
Flash
Codes
Description
Green
LED 16
Red
LED 8
Red
LED 4
Red
Led 2
Red
LED 1
On Steady This is a Control Failure -----
1 Flash Not Applicable -----
2 Flashes Control waiting ASCD
1
1. Non-alarm conditions.
Flashing Off Off On Off
3 Flashes HPS1 Compressor Lockout Off Off Off On On
4 Flashes HPS2 Compressor Lockout Off Off On Off Off
5 Flashes LPS1 Compressor Lockout Off Off On Off On
6 Flashes LPS2 Compressor Lockout Off Off On On Off
7 Flashes FS1 Compressor Lockout Off Off On On On
8 Flashes FS2 Compressor Lockout Off On Off Off Off
9 Flashes Ignition Control Locked Out / Ignition Control Failure Off On Off Off On
10 Flashes Compressors Locked Out on Low Outdoor Air Temperature
1
Flashing On Off On Off
11 Flashes Compressors locked out because the Economizer is using free Cooling
1
Flashing On Off On On
12 Flashes Unit Locked Out due to Fan Overload Switch Failure Off On On Off Off
13 Flashes Compressor Held Off due to Low Voltage
1
Flashing On On Off On
14 Flashes EEPROM Storage Failure Off On On On Off
15 Flashes HPS3 Compressor Lockout Off On On On On
16 Flashes HPS4 Compressor Lockout On Off Off Off Off
17 Flashes LPS3 Compressor Lockout On Off Off Off On
18 Flashes LPS4 Compressor Lockout On Off Off On Off
19 Flashes FS3 Compressor Lockout On Off Off On On
20 Flashes FS4 Compressor Lockout On Off On Off Off
21 Flashes Compressor Off due to Low SAT
1
On Off On Off On
OFF No Power or Control Failure Off Off Off Off Off
Check
Alarm
History
Reset All ASCDs
For One Cycle
Non Alarm Condition
Green LED Flashing
Current Alarm
Flashed Red LED
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