Model FP-700
FP-700 Instruction Manual Rev. 5.1 Page 37 of 46
• If problem persists, replace the Intelligent Sensor Module.
Unreadable Display
• If due to excessive sunlight, install a sunshade to reduce glare.
Nothing Displayed – Transmitter not Responding
• Verify condulet has no accumulated water or abnormal corrosion.
• Verify required DC power is applied to correct terminals.
• Swap with a known-good ITM to determine if ITM is faulty.
Faulty 4-20mA Output
If Sensor has a normal reading with no Faults displayed, and the 4-20 mA signal output is 0mA….
• Check that wiring is properly connected at terminal blocks and through to controller inputs.
• The 4-20mA output loop must be closed to avoid a Loop Fault. If the 4-20mA output is not being used
the green wire from the sensor must be connected to the (-) terminal on the Transient Protection Module
to ensure that it does not create a 4-20mA Fault. (section 2.6 Field Wiring)
• Perform a “Signal Output Check” sequence via Section 3.5.8 and verify 4-20mA output with Current
Meter.
• Swap with new ITM to determine if the ITM’s 4-20mA output circuit is faulty.
• If the 4-20mA current loop is still out of tolerance, contact Detcon at Service@detcon.com
, or contact
Detcon customer service.
No Communication – RS-485 Modbus™
If unit has a normal reading with no Faults displayed and the Modbus™ is not communicating….
• Verify that the correct (and non-duplicated) serial address is entered (per Section 3.5.6).
• Check that wiring is properly connected at terminal blocks and through to controller inputs.
• Perform a “Signal Output Check” sequence via Section 3.5.8 and troubleshoot wiring.
• Swap with new ITM to determine if the ITM’s serial output circuit is faulty.
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