Problem
Possible Cause(s)
Action(s)
Display Error
1. Loose ribbon cable/
damaged ribbon cable
1. Visual inspection.
2. Cycle the power to reset the meter.
Flow measurement
seems low
1. Probe not oriented properly
2. Sensor dirty
1. Orient probe per installation sections:
Insertion (p. 18), Inline (p. 26)
2. Clean sensor (p. 79)
Unit will not power-up 1. No power input
2. Bad fuse
3. Bad Power supply
1. Check fuse (F1) located next to TS1 on main
board.
2. Check for correct power supply voltage at
TS1 on main board.
If fuse is OK and unit still won’t power up, call
ONICON for additional assistance
(-) (+)
(-) (+)
Power
12-28VDC
4-20mA
!
Transmit LED (Yellow)
Heartbeat LED (Green)
Receive LED (Orange)
Troubleshooting
CAUTION! The electronics and sensor supplied by ONICON are calibrated as a single
precision mass flow meter. Interchanging sensors will decrease the accuracy of the
flow meter. If you experience any problem with your Model F-5500 Flow meter, call
ONICON Customer Service Department, Technical Assistance at 727-447-6140.
LED Indicators
The LED indicators near the terminal blocks of the F-5500 display the status of the
F-5500. The Heartbeat LED blinks fast when the F-5500 is powered up, and blinks
about once a second when the F-5500 operates normally.
The Transmit and
Receive LEDs blink when
messages are sent and
received through serial
communication. The
Receive LED may be
illuminated if the F-5500 has
HART communication and
the 4-20mA output is not
connected.
11451 Belcher Road South, Largo, FL 33773 • USA • Tel +1 (727) 447-6140 • Fax +1 (727) 442-5699 • [email protected]
F-5500 Thermal Mass Flow Meter Manual 06/17 - 2030 / 107023
Page 80
Model F-5500
MAINTENANCE
Model F-5500
TROUBLESHOOTING
Troubleshooting: General
Troubleshooting