Troubleshooting

This section is intended to be a guide to correcting problems, which may arise in the field. MSA should be contacted for assistance if the corrective action listed does not eliminate the problem. Defective units should be returned to MSA for repair with a complete written description of the problem.

NOTE: If the equipment is under warranty, any repairs performed by persons other than MSA authorized personnel may void the warranty. Please read the warranty statement carefully.

WARNING! 

Be sure to inhibit or disconnect external alarm wiring before making any check that might send the unit into alarm.

Failure to follow this warning can result in serious personal injury or death.

Problem	Possible Cause	Corrective Action
Analog output signal = 0 mA and green LED in window is off	No DC power to the Unit	Be sure that the +24 VDC is applied with the correct polarity
Analog output signal = 0 mA (3.5 or 1.25 mA with HART) and green LED in window is rapidly blinking	Low voltage FAULT (voltage at unit is approximately +18.5 VDC)	Be sure that the unit is powered with at least +24 VDC under load
Analog output signal = 0 mA (3.5 or 1.25 mA with HART) and green LED in window is rapidly blinking, +24 VDC verified	Flash Checksum Not OK	Re-cycle power to the unit
Analog output signal = 0 mA (3.5 or 1.25 mA with HART) and green LED in window is rapidly blinking, +24 VDC verified OK, power was re-cycled	Flash Checksum Still Not OK	Call MSA customer support
Analog output signal = 2 mA (3.5 mA with HART and small current disabled) and green LED in window is slowly blinking	COPM FAULT, dirty or obscured optical path (detector window)	Clean the window and reflector
Dipswitch settings do not match those observed in the operation of the detector	Device settings may have been changed by either HART, Modbus or Bluetooth and no longer correspond to those on the dipswitch	Recycle power to the unit while connecting the test IO terminal to ground (refer to Power Up Grounding of the Test and Relay Reset Lines). After startup, adjust settings via dipswitch as described in Switch Selectable Options.
Troubleshooting Bluetooth Errors
Blue LED is not flashing during start up or manual activation.	BLE dipswitch is off or connection is lost.	Ensure the BLE dipswitch is ON and the BLE connector is completely in its socket.
Blue LED is flashing, but the device is not pairing with the FL5000 on the app.	The device is too far away from the FL5000 to connect, or there is a weak signal preventing connection.	Move the user closer to the FL5000 or move to a different location if there is potential sources of interference between the device.
Blue LED is on for > 5 minutes after disconnection.	The FL5000 is still connected with the user's device.	Turn off Bluetooth connection on the user's device or recycle the FL5000's power.