LED Troubleshooting
Using LEDs To Verify Operation
The VAV/Zone Controller is equipped with LEDs that can be used
to verify operation and perform troubleshooting. See
Figure 18
.
for the LED locations. The LEDs and their uses are as follows:
Operation LEDs - Factory Troubleshooting
COMM
- This orange LED will light up and blink continuously
to indicate communications are working properly.
POWER
- This green LED will light up to indicate that 24 VAC
power has been applied to the controller.
APP HB
- This green LED will light up and blink continuously
to indicate the application software is working properly.
WDOG
- This green LED will light up and stay lit to indicate
the operating system is working properly.
OS HB
- This green LED will light up and blink continuously
to indicate the operating system is working properly.
Diagnostic LEDs
STAT 1
- This red LED is a diagnostic blink code LED. It blinks
continuously while in TEST MODE at address 63. Under normal
operation, it should not be blinking.
STAT 2
- This red LED is a diagnostic blink code LED. It blinks
continuously while in TEST MODE at address 63. The status
code is repeatedly blinked every 10 seconds to indicate control-
ler status. See
Table 4, below
for STAT 2 LED Blink Codes.
The Blink Codes are listed in order of priority with 7 being the
highest priority.
Only the highest priority failure code will blink. You must correct
the highest priority alarm before other problems will be indicated.
LED Blinks This
Number of Times
Blink Code Description
1
Normal Operation.
No Alarm Conditions Exist
2
Push-button Override or
Group Override Is Active
3
Communications Failure
4
Bad Airfl ow Sensor
5
Bad Or Missing Space Sensor
6
Damper Open or Close Failure
7
Damper Feedback Failure
Table 4: STATUS 2 LED Blink Codes
If the STAT 2 LED does not operate as indicated, fi rst check the
address switch setting.
See Figure 16, page 25
for correct address
switch setting procedures. If the address switch setting is correct
and the STAT 2 LED still does not behave as indicated above,
contact WattMaster Controls Technical support.
AUX HEAT RELAY LED
- This yellow LED will blink to signal
the Aux Heat Relay is enabled.
CCW LED & CW LED
- These yellow LEDs blink or are on steady
depending on the direction the damper is currently being driven.
1002
1002
1002
1002
1002
1002
1002
1002
3650
.001uF
OFF
3650
3650
3650
3650
3650
POWER
APP HB
WDOG
OS HB
STAT 2
STAT 1
COMM
ADDRESS
1
2
4
8
16
32
ON
LOOP
BAUD
1
2
E-BUS
V2
P1
R5
SW1
R5
R5
R4
R4
R4
R4
R4
D7
C29
3650
VAV/Zone Controller
STAT 1 LED
STAT 2 LED
OS HB LED
WDOG LED
APP HB LED
POWER LED
COMM LED
D1
R40
D2
1002
1002
4751
4751
10uF
VAC
~
VDC
VDE
ACTUATOR
HEAT
AUX
CW
CCW
SERIAL #
V4
V3
TB5
R24
R21
P3
C25
R42
D13
AUX HEAT
LED
CW LED
CCW LED
Figure 18: VAV/Zone Controller LED Locations
38
VAV/Zone Controller Package
TROUBLESHOOTING
