278806-BIM-A-1106
Unitary Products Group
25
FIGURE 12 - UNIT CONTROL BOARD
TABLE 13: UNIT CONTROL BOARD FLASH CODES
FLASH CODE
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 condition.
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
10 Flashes
Compressors Locked Out on Low Outdoor Air Temperature
1
Flashing
On
Off
On
Off
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
OFF
No Power or Control Failure
Off
Off
Off
Off
Off
Chec
k
A
larm
History
Reset
A
ll
A
SCDs for
One Cycle
Non
A
larm
Condition Green
LED Flashing
Current
A
larm
Flashed
Red LED