
035-17311-000 REV A (1200)
34
Unitary Products Group
TABLE 33: UNIT CONTROL BOARD FLASH CODES
Flash Code
Description
On Steady
Control Failure - Replace Control
Heart Beat
Normal Operation
1 Flash
Not Applicable
2 Flashes
Control waiting ASCD
1
3 Flashes
HPS1 - Compressor Lock out
4 Flashes
HPS2 - Compressor Lock out
5 Flashes
LPS1 - Compressor Lock out
6 Flashes
LPS2 - Compressor Lock out
7 Flashes
FS1 - Compressor Lock out
8 Flashes
FS2 - Compressor Lock out
9 Flashes
Ignition Control Locked Out/
Ignition Control Failure/Limit Switch Trip/No
Jumper Plug In Electric Heat Section
10 Flashes
Compressors Locked Out On Low
Outdoor Air Temperature
1
11 Flashes
Compressors Locked Out Because The
Economizer Is Using Free Cooling
1
12 Flashes
Fan Overload Switch Trip - Not Applicable In This
Unit
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.