Troubleshooting
Troubleshooting
Troubleshooting
Troubleshooting
Troubleshooting
There are no setup parameters to set or other
adjustments required for the TD-SP to operate
properly. You should be able to remove the TD-
SP from the box, plug it into a SP control and
immediately display the sensor temperature.
If you have a problem:
1.
For “no display” condition check that power
is connected to the SP control and that the SP
control is operating properly. Next check the
wiring connection between the TD-SP and the SP
control. Lastly, turn power off, wait 1 minute and
then reapply power. If there still is a problem the
TD-SP will have to be returned for repair
2.
For “partial displays” or general “erratic”
operation: Turn power off, wait 1 minute, and
then reapply power. If there still is a problem, the
TD-SP will have to be returned for repair.
3.
For temperature displays that “bounce” be-
tween several different values: Check that the
sensor lines are not near other electrical cabling,
use shielded sensor wire if required.
4.
For “erroneous” readings check that the sen-
sor is making good thermal contact with whatever
is being measured and that the sensor is insulated
from ambient temperatures. If the sensor is in a
wet (constantly condensing humidity), moisture
may, over time, enter the sensor body and result in
errors. If this is the case, replace the sensor.
As a last resort, unwire the sensor from the SP
control, measure the resistance with an ohmmeter
and lookup the corresponding temperature on an
IE “resistance vs. temperature” chart (see back).
This will allow you to determine whether the
sensor or the TD-SP is causing the error. If it is the
TD-SP, then return the unit to IE for repair.
Snubber Capacitor
Snubber Capacitor
Snubber Capacitor
Snubber Capacitor
Snubber Capacitor
Inductive loads such as solenoid valves and
contactor coils can generate large voltage "spikes"
on the AC line. Occasionally, these spikes can
cause problems with the TD-SP display unit (typi-
cally blank displays or displays with missing
segments).
To prevent any problems, install the enclosed
snubber capacitor directly across the "C" and
"NO" terminals (or "NC" if you are using the
normally closed contacts) as shown in the dia-
gram below. The capacitor is rated for use on
24, 115, and 240VAC loads. If you have any
questions, please call Independent Energy tech-
nical service at 800-343-0826.
