349215-JIM-B-1008
66
Johnson Controls Unitary Products
NOTE:
While in either Setup mode, if no buttons are
pushed for 60 seconds, the display will revert
to its normal display, exiting the Option Setup
mode.
When saving, the control board only
saves the parameters for the currently dis-
played mode (Option Byte or Heat Delay).
OPTIONAL VAV CONTROL BOARD FLASH CODES
Flash codes are also utilized by the VAV add-on board to aid
in troubleshooting optional VAV applications. Flash codes are
displayed by a red LED located near the center of the board
using a short on/off cycle (approximately 200-ms on and 200-
ms off).
To verify that the board is functioning correctly, the LED will
display a repetitive 1 second on, 1 second off "heartbeat". Do
not confuse this "heartbeat" with the error flash codes shown
in the table below. To prevent confusion, a 1-flash, flash code
is not used.
TABLE 28: HEAT DELAY
Heat
Fan On
Delay
Heat
Fan Off
Delay
Red
LED 8
Red
LED 4
Red
LED 2
Red
LED 1
60
180
On
On
On
On
60
90
On
On
On
Off
60
60
On
On
Off
On
60
30
On
On
Off
Off
45
180
On
Off
On
On
45
90
On
Off
On
Off
45
60
On
Off
Off
On
45
30
On
Off
Off
Off
30
180
Off
On
On
On
30
90
Off
On
On
Off
30
60
Off
On
Off
On
30
30
Off
On
Off
Off
0
60
Off
Off
On
On
0
30
Off
Off
On
Off
0
10
Off
Off
Off
On
Non-std
Non-std
Off
Off
Off
Off
TABLE 29: VAV CONTROL BOARD FLASH CODES
FLASH CODE
DESCRIPTION
On Steady
Control Failure
1 Flash
Not Applicable
2 Flashes
Loss of Communication with UCB
3 Flashes
Space Sensor Failure
4 Flashes
SAT Sensor Failure
5 Flashes
RAT Sensor Failure
6 Flashes
OAT Sensor Failure
7 Flashes
OH Sensor Failure
8 Flashes
RH Sensor Failure
9 Flashes
IAQ Sensor Failure
10 Flashes
OAQ Sensor Failure
11 Flashes
APS Sensor Failure
12 Flashes
Limit 2 Switch Open
13 Flashes
Purge
14 Flashes
VFD Input Failure
15 Flashes
Dirty Filter Switch
OFF
No Power or Control Failure
