Troubleshooting - ILX Lightwave LDT-5525 User Manual

b. Press and breifly hold in both the MODE and DISPLAY switches. This will put the LDT-5525 into ITE
calibration mode. Wait for three seconds for the output to settle to about 3 Amps.
c. Press and hold in the ENBL switch and turn the ADJUST knob until the display shows the correct value
(absolute value of the ITE measurement), as calculated from Step a.
d. Release the ENBL switch. Wait three seconds to allow the ITE current to settle at the new set point.
e. Repeat Steps c and d four more times, once for each of the (automatically set) set points -3 Amps, +3 Amps,
+1 Amp, and -1 Amp. After the value for the -1 Amp (last) set point is entered, the LDT-5525 Temperature
Controller will automatically calibrate its ITE current limits.
After about 10 seconds, the LDT-5525 Temperature Controller will store the new calibration data in non-
volatile memory.
f. After calibration, the I LIMIT will be automatically set to 0.00 Amps. Reset the I LIMIT to the desired value.

3.3.5 Troubleshooting

This appendix is a guide to troubleshooting the LDT-5525 Temperature Controller. Some of the more common
symptoms are listed here, and the appropriate troubleshooting actions are given. We recommend that the user start at
the beginning of this guide. Read the symptom descriptions, and follow the steps for the corrective actions which
apply. If you encounter problems which are beyond the scope of this guide, contact your ILX Lightwave
representative.
SYMPTOM
LDT-5525 Series unit will
not power up
Power on, but display is frozen,
switches don't work
Power on, but no TE current
output
CORRECTIVE ACTIONS
1. Check AC Power line
voltage and power cord
connection.
1. This may occur if the unit
loses power (AC line) briefly.
Turn the power switch off and
on again to restart.
1. If TE OPEN indicator
is lit, check the load
connections and then try again.
2. Check that pins 14 and 15 of
the output connector are not
connected (see Section 2.6.4,
Booster Operation).
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