Installation manual

ROBERTS GORDON
®
ULTRAVAC™ CONTROLLER INSTALLATION MANUAL
34
SECTION 9: TROUBLESHOOTING
FIGURE 26: Troubleshooting Flow Chart
Contact your
ROBERTS GORDON
®
Independent Distributor.
On the Manual Override screen
(Alt+M), set the vacuum pump
status to ON. Does the pump
light on the controller come on?
Yes
No
Verify communication wiring
between PC and controller. Verify
wiring between sensor and
controller. Verify shield wires
are twisted and/or grounded.
Does the pump light on the
controller turn on?
No
Yes
No
Are current conditions being
continually updated on the
Board Status screen?
Rectify wiring between 24 V
control board power supply and 24 V control board power input.
Yes
No
Is there 24 Vac at the 24 V
control board power input?
Check circuit breaker and
controller power supply.
Replace 24 V power 1 A fuse on
relay board. See Section 8.
Yes
No
Is there 120 V at the relay board
power input terminals
L1 and L2?
Contact your
ROBERTS GORDON
®
Independent Distributor.
Are shield wires from RS-485
communication bus wiring and
VFD 0-10 V signal wiring correctly
twisted and/or grounded?
Yes
START
On the Manual Override screen
(Alt+M), set the vacuum
pump status to "Auto".
Does the pump go on?
No
Yes
No
Press the reset button on the
control board. Is the red "RUN"
light blinking.
Is the bulb for the pump light on
the controller burnt out?
No
Yes
No
Is the red RUN LED on the
control board blinking?
No
Yes
Is there 24 Vac across the 24 V
control board power supply
terminals on the relay board?
Yes
No
Is the green power LED on the
control board lit?
Is the 24 Vac switch on the
relay board on?
Yes
Is the power light bulb
burnt out?
No
No
Yes
Is the pump light on the
controller lit?
Yes
No
Are pump and/or burners
turning on and off erratically?
No
Yes
Is the power light on the control
panel lit?
Yes
Set the setpoint above the zone temperature. Verify
scheduling times and adjust the correct setpoint
(occupied or setback). Verify zone temperature
sensor reading on the Board Status screen.
Does the pump turn ON?
No
Yes
Yes
No
No
No
Yes
Yes