42
Faults
Output current
overshoots
scale (exceeds
20mA).
No output
current (less
than 3.8 mA).
Output current
error
Cause
(1) The manifold valve does not open/
close normally.
(2) Pressure leak is occurring.
(3) Process piping is improper.
(4) Process pipe is clogged.
(5) Power supply voltage and/or load
resistance is improper.
(6) Voltage between the external con-
nection terminals of transmission unit
is wrong.
(7) Zero and span are not adjusted.
(8) Electronics unit is faulty.
(1) Same as (1) to (4) above
(2) Power supply polarity is wrong.
(3) Power supply voltage and/or load
resistance is improper.
(4) Voltage between the external con-
nection terminals is wrong.
(5) Electronics unit is faulty.
(1) Process piping is improper.
(2) Gas or solution is mixed in.
(3) Liquid density changes.
(4) Ambient temperature changes widely.
(5) Zero or span has deviated.
(6) Electronics unit is faulty.
Remedy
Repair the valve so that it opens/closes
normally.
Repair a leak.
Make correct piping.
Eliminate the cause of clogging.
Make arrangement to obtain proper values. For
power supply voltage and load resistance, refer
to 7.2.
(For intrinsically safe installations, the power
supply voltage should be 16.1 to 26V DC.)
Check for faulty cable, insulation, etc. and repair
as needed.
For power supply voltage and load resistance,
refer to “7.2”.
(For intrinsically safe installations, the power
supply voltage should be 16.1 to 26V DC.)
Readjust according to chapter 4.
Replace the electronics unit according to 5.3.
Correct wiring according to 7.1.
Make arrangement to obtain proper values.
(For power supply voltage and load resistance,
refer to 7.2.)
(For intrinsically safe installations, the power
supply voltage should be 16.1 to 26V DC.)
Check for faulty cable, insulation, etc. and repair
as needed.
(For power supply voltage and load resistance,
refer to 7.2.)
(For intrinsically safe installations, the power
supply voltage should be 16.1 to 26V DC.)
Replace the electronics unit according to 5.3.
Correct the piping.
Vent or drain the transmitter.
Perform density compensation.
Minimize the temperature change.
Readjust zero or span.
Replace the electronics unit according to 5.3.
If remedy is impossible, contact Fuji Electric’s service department.
5.2 Troubleshooting
If troubleshooting, check the fault by using the Hand Held Communicator (HHC) with function
"SELF CHECK" - Refer the chapter " Operation" in this manual.
The transmitter is supplied with the burnout adjusted : “fixed” output signal in case of
failure.
If an abnormality occurred in the process or transmitter, action should be taken with
references to the table below.
