Detcon FP-424C - Manual (Page 14)

Unstable Output/ Sudden Spiking/Nuisance Alarms
1. Check condulet for accumulated water.
2. Check transmitter and Terminal PCB for abnormal corrosion.
3. Determine if problem correlates with condensation cycles.
4. Add/change Detcon condensation prevention packet
PN 960-202200-000 (replace annually).
5. Check for unstable power supply.
6. Check for inadequate grounding.
7. If correlates with radio communications then use Detcon RFI filter accessory.
8. Contact Detcon for assistance in optimizing shielding, grounding, and RFI protection.
Transmitter not Responding
1. Verify condulet has no accumulated water or abnormal corrosion.
2. Verify required DC power is applied to correct terminals.
3. Swap with a known-good transmitter to determine if transmitter is faulty.
Bad 4-20 mA output
1. Check that wiring is connected to correct terminal outputs.
2. Swap with a known-good transmitter to determine if transmitter is faulty.
10.0 S PARE P ARTS L IST
613-010000-000 Sensor rain shield
613-120000-000 Sensor splash guard
943-000006-132 Threaded Calibration Adapter
612-820000-000 LEL sensor housing assembly (plug-in detector, PN 370-201600-000, not included)
370-201600-000 Sensor: f ield replaceable plug in detector
500-005065-007 Terminal Connector Board
897-850800-000 NEMA 7 enclosure less cover - 3 port
897-850400-000 NEMA 7 enclosure cover
960-202200-000 Condensation prevention packet (replace annually)
924-525400-100 FP424C Plug-in control circuit
Detcon Model FP-424C Combustible Gas Sensor PG.14
Rain Shield
Calibration Adapter
FP-424C Transmitter Assembly
Sensor Terminal Board
Enclosure Cover
Enclosure
Sensor: field replaceable plug-in detector
LEL Main Sensor Housing Assembly
Condensation
Prevention Packet
(replace annually)