User manual

Appendixes Phason
52
Troubleshooting
The following table lists some problems, possible causes, and possible solutions. If you are having a
problem using your SEC-HD, 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 SEC-HD layout on page 12.
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 SEC-HD layout on
page 12.
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 15.
The idle speed is too high.
 Decrease the idle speed setting. For more
information, read Programming variable
stages on page 30.
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 30.
Incorrect motor curve
 Configure the stage to use the other motor
curve. For more information, read
Configuring the stages on page 23.