User manual

TVS user manual Appendix B: Troubleshooting
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Troubleshooting
The following table lists some problems, possible causes, and possible solutions. If you are having a
problem using your TVS, see if the problem is described in the Troubleshooting table and then
follow the directions for correcting the problem.
Problem Possible cause Possible solution
Power supply components blown
out
Burn marks on boards and
components
Motors and fans slow down or
stop
Power surge, brownout, or power
outage
 Avoid the problem in future by providing
proper voltage and protection for the
control.
No power and/or display A circuit breaker at service panel is
off or tripped.
 Reset the circuit breaker.
Incorrect incoming power wiring  Correct the wiring.
The display board connect cable is
not plugged into the control board
properly.
 Plug in the display board cable. For more
information, read
TVS layout on page 13.
The 115/230 VAC switch is in the
wrong position
 Switch off the power, set the switch to the
correct setting, and then switch on the
power. For more information, read
TVS
layout
on page 13.
Temperature does not change The control is in temperature
override mode.
 Exit test mode. For more information, see
Using temperature override mode on
page 41.
Display showing unusually high
or low temperature
The probe is not a Phason probe.  Remove the probe and then install a
Phason probe.
The extension cable connected to
the temperature probe is providing a
poor connection
 Check the extension cable connection and
re-solder it if necessary.
Damaged probe  Replace the temperature probe.
Variable fan runs at maximum Incorrect wiring  Correct the wiring. For more information,
read
Connecting variable-stage cooling
elements
on page 16.
The idle speed is too high.  Decrease the idle speed setting. For more
information, read
Programming variable
stages
on page 33.
The differential setting is the same
as the
set point.
 Adjust the set point to the desired
temperature. For more information, read
Programming variable stages on page
33.
Incorrect motor curve  Configure the stage to use the other
motor curve. For more information, read
Configuring the stages on page 26.