86 1100 Series FD Reference Manual
4 Troubleshooting and Test Functions
Compensation Sensor Open
The ambient-compensation sensor (NTC) on the FLM board in the detector
has failed (open circuit).
The resistance across the temperature compensation sensor (NTC) on the FLM
board is dependent on ambient temperature. The change in resistance is used
by the leak circuit to compensate for ambient temperature changes. If the
resistance across the sensor increases above the upper limit, the error
message is generated.
Probable Causes
• Defective FLM board.
Suggested Actions
✔ Exchange the FLM board.
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