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® 2018 Valco Companies, Inc.
APPENDIX 4 - Troubleshooting - continued
2.2e
If all sensors are reading low by about the same amount, the control board must
be replaced.
2.3b
Ensure there is nothing draining the 12 volt supply to the input. If there is, disconnect
the other device. Then turn off the power to the controller and back on again.
2.3c
Replace sensor.
Feeder sensor is
wired but reading
improperly.
2.4a
Is the amperage set above zero and below the actual amperage reading?
2.4b
Is the wire running through the loop of the sensor?
2.4c
If there is a second feeder wire, do the two run the same direction through the
sensor loop?
2.4d
Have you set feeder ON/OFF time cycles? The sensor will not read power outside of a
feeder ON cycle.
3. Equipment
One equipment group
does not turn on.
3.1a
Is the controller on?
3.1b
Manually turn the toggle switch for that group to ON. If the equipment turns on, go to
3.1c. If it does not turn on, go to 3.1d.
3.1c
Check the programming for the equipment group. The group is either not installed or is
not set up right. Check
Operating Manual
for information on how to set up this type
of equipment.
3.1d
Check the fuse by the appropriate relay. Replace it if it is blown. Otherwise, do you hear
the relay inside the enclosure click when you turn the toggle switch ON and OFF? If it
clicks, go to 3.1m. If not, go to 3.1e.
3.1e
Do other groups in the same column turn on? If not, open the enclosure and check ribbon
cable connection from relay board to control board. If it still does not turn on, go to 3.1f.
3.1f
If there is still no relay click when you flip the switch ON, bypass the relay to see if
equipment works. If it does, change out relay board.
3.1m
Check the circuit breaker for that equipment group. If tripped or off, turn on. If on, go to
3.1n-p.
3.1n
Equipment may not be wired correctly. Verify wiring of all groups by turning them on
one at a time manually and making sure the equipment is on.
3.1o
Wire may be damaged. Check wiring for damage. Verify wire connection in electrical
box and at equipment.
3.1p
Equipment may be bad.
3.1q
Are sensors properly programmed? Verify that your sensor parameters are entered
properly and that temp sensors are properly numbered. See item 2.2.
Nothing runs when on
AUTO.
3.2a
Beginning Head Count is zero. Must be more than zero for auto control to operate.
3.2b
Check the List Equipment menu. Equipment may not have been programmed into
the controller.
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