VICI TCD2 - Manual (Page 21)

17
Troubleshooting
Troubleshooting Chart
Problem Possible Cause Refer to page:
No signal Main or filament power switch off 4
Filament temperature too low 4
Fuse blown 3
Output cable in the wrong connector 14
Signal reversed Signal wires reversed 14
Noisy signal Dirty system or leaking fittings 7, 13, 19
Bad flow controller in system 15
Cell/filament differential too small 15
Filament damaged 2
Cannot zero the signal Recorder/Int. not zeroed 16
Voltage incompatibility 14
Main or filament power switch off 4
Excessive drift* Block temperature not stabilized 15
Heater fault 17
Cell doesn’t heat properly Heater/sensor cable unplugged/
heater fail safe mechanism 17
Heater fault 17
Fuse blown 3
For technical assistance from Valco Instruments, call (713) 688-9345 or email [email protected].
*Try referenced mode, page 12
Heater Fault Determination
The heater control circuit is designed to disable itself in the event of a fault
such as over-temperature, shorted heater, short/open temperature sensor,
etc. Once disabled, circuit operation is restored by turning off the controller,
disconnecting and reconnecting the detector cable, and then turning the
controller back on.
E.g., if mains power is applied before the detector is
connected to the controller, the heater circuit will not operate until mains
power is removed, the detector connected, and mains power restored.
Under normal circumstances, the amber temperature indicator light will flash
once after mains power is applied, before control is established. If the light
fails to flash, it indicates that a fault has been detected or (less likely) the
heater supply fuse has failed.