Det-Tronics R8471J Single Channel Gas Controller, OPECL - Manual (Page 20)

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Table 2—Troubleshooting Guide
Indication at controller Possible cause
No faceplate indicators
illuminated.
Input power failure. Check wiring to external power source.
FAULT LED on, digital display
blank.
Power-up time delay (up to 5 minutes). If condition continues after 5
minutes, repeat power-up. If problem continues, replace controller.
F91 to F98 Status
Initialization failure. Repeat power-up. If successful, re-program and
re-calibrate. If not, replace controller.
F92 Status OPECL problem (during startup) - current is over 5 ma or below 0.5 mA.
F94 Status
RAM failure. Repeat power-up. If not successful, return to factory for
repair.
F96 Status
Input power upon startup out of spec (should be 18 to 2 volts). Check
operation of power source and power wiring. Correct problem and repeat
power-up.
F97 Status
Controller type invalid. Error in data from RAM. Repeat power-up. If not
successful, return to factory for repair.
F70 Status
External reset activated for over 15 seconds. Check external switch and
wiring.
F60 Status
Input power out of tolerance. Check operation of power source and power
wiring.
F50 Status Internal power supply problem. Replace controller.
F40 Status
OPECL output (after startup) is over 5 mA or below 0.5 mA. Check
OPECL wiring and calibration.
F41 Status OPECL has blocked optics. Refer to OPECL manual.
F42 Status OPECL calibration line fault.
F0 Status Negative zero drift. Check OPECL alignment and calibration.
CAL OPECL in calibrate mode, doing Zero calibration.
CC OPECL in calibrate mode, successful calibration completed.