Troubleshooting
CNT-SVX04A-EN
91
Table 59
Test sequence for face/bypass unit configurations
Note
1
:
Upon entering manual output test mode, the controller turns off all fan outputs and drives all
dampers and valves closed (if required).
Note
2
:
At the beginning of step 2, the controller attempts to clear all diagnostics.
Note
3
:
If the unit is configured for a 2-speed fan, the fan remains on high speed at step 3.
Note
4
:
If the unit is configured for a 2-speed fan, the low fan speed output engergizes at step 3. If the
unit is configured for a 1-speed fan, the fan remains on high speed at step 3.
Note
5
:
If the unit is configured for a 1- or 2-speed fan, the exhaust fan output energizes on step 7. The
exhaust fan output is shared with medium fan speed.
Note
6
:
After step 10, the test sequence performs an exit. This initiates a reset and attempts to return
the controller to normal operation.
Minimum timers
The controller automatically exits the
manual test mode after one hour and
reverts back to normal operation.
The outputs are not subject to minimum times during the test sequence.
However, the test sequence only permits one step per second, which enforces a
minimum output time.
LED operation
The green status LED is off when you press the Test button. To begin the
manual output test mode, press and hold the Test button (which causes the
green LED to go off) for at least two seconds, then release the button. The green
LED blinks, indicating the controller is in manual test mode.
Step
Fan
DX, or cool
or heat/cool
changeover
valve
Face/ bypass
damper
Electric heat,
or heat valve
Outdoor air
damper
Generic/
baseboard
heat
J1-1
J1-2
J1-3
J1-5
J1-6
J1-7
J1-8
J1-9
J1-10
J1-11
J1-12
TB4-1
1:
Off
1
Off
Off
Off
Off
NA
Off
On
Off
NA
Off
On
Off
2:
Fan high
2
High
Off
Off
Off
NA
On
Off
Off
NA
Off
Off
Off
3:
Fan med
3
Off
Med
Off
Off
NA
On
Off
Off
NA
Off
Off
Off
4:
Fan low
4
Off
Off
Low
Off
NA
On
Off
Off
NA
Off
Off
Off
5:
Main open, DX on High
Off
Off
On
NA
On
Off
Off
NA
Off
Off
Off
6:
Main close, DX
off, aux open
High
Off
Off
Off
NA
On
Off
On
NA
Off
Off
Off
7:
Aux open, exhaust
fan
5
High
Exh
Off
Off
NA
On
Off
On
NA
Off
Off
Off
8:
Aux close, damper
open
High
Off
Off
Off
NA
Off
On
Off
NA
On
Off
Off
9:
Outdoor air
damper close
High
Off
Off
Off
NA
Off
On
Off
NA
Off
On
Off
10:
Generic/
baseboard heat
energized
High
Off
Off
Off
NA
Off
On
Off
NA
Off
Off
On
11:
Exit
6