Fluid Components International MT86_MT86HT Manual Troubleshooting - Manual

Doc. No. 003162 Rev. F 5 - 1 Models MT86, MT86HT
CHAPTER 5 - TROUBLESHOOTING FLUID COMPONENTS INTL
5. Troubleshooting
Warning: Only qualified personnel should attempt to test this instrument. The operator assumes all
responsibilities for safe practices while troubleshooting.
Caution: The flow transmitter contains electrostatic discharge (ESD) sensitive devices. Use standard ESD
precautions when handling the flow transmitter. See Chapter 2, Installation, for ESD details.
Quick-Check Troubleshooting
At this point, observe the system setup to verify operation. Use Table 5-1 as a quick check of problems and
solutions. More in-depth discussions follow this table.
Table 5-1. Quick Check Troubleshooting
PROBLEM SOLUTION
No Output Check power application, check power supply fuse.
Flashing LED Set SW2 on the control board to the total number of sensing points.
Unexpected Outputs
Check all connectors for proper seating.
Switches SW1-1 through 1-3 should be open, 1-4 is a temp. comp. switch,
that is open when temp. comp. is used and closed when temp. comp. is not
used.
Check jumper positions (factory set positions are jumpers 1, 3, 5 and 7
installed).
The above switches and jumpers are on the control board.
Check the flow elements FLAT and FLOW ARROW versus the flow media.
Troubleshooting Equipment
2 each, Digital Multi-Meter (DMM) capable of measuring ohms, milliamps, and AC or DC voltage with a 4 1/2 digit
resolution.
3 each, precision decade resistance boxes (however they are optional if fixed precision resistors are used).
1 each, 1K ohm resistor for model MT86 or 100 ohms for model MT86HT.
Non-Maintenance Observations
At this point, observe the system setup to verify operation. No disassembly or testing is required at this time.
Check Serial Numbers
Verify that the serial number of the flow element(s) and the flow transmitter are the same. The flow elements and the
flow transmitter are a matched set and cannot be operated independently of each other. See Chapter 2 for a complete
explanation of serial numbers.
Check Input Power
Verify that the correct power source is turned on and connected.