99 TN5FCXA2VG-E
If remedy is impossible, contact Fuji Electric’s service department.
7.3 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 occurrs in the process or transmitter, action should be taken with
references to the table below:
Symptom
Cause
Remedy
Output current
overshoots
scale
(The value is
more than the
upper limit of
the saturation
current.).
(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
connection terminals of amplifier
unit is wrong.
(7) Zero and span or fixed output
current(4, 20mA) are not adjusted.
(8) Electronic unit is faulty.
Repair the valve so that it opens/closes normally.
Repair leak.
Make correct piping.
Eliminate the cause of clogging.
Make arrangement to obtain proper values.
Check for faulty cable, insulation, etc. and repair
as needed.
Readjust according to chapter 6.
Replace the amplifier unit according to chapter 7.3.
No output
current
(The value is
less than the
lower limit of
the saturation
current).
(1) Same as (1) to (4) above
(2) Power supply polarity is wrong.
(3) Power supply voltage is improper.
(4) Voltage between the external
connection terminals is wrong.
(5) Zero and span or fixed output
current(4, 20mA) are not adjusted.
(6) Amplifier unit is faulty.
Correct wiring according to chapter 4.1.
Make arrangement to obtain proper values.
Check for faulty cable, insulation, etc. and repair
as needed.
Read just according to chapter 6.
Replace the amplifier unit according to chapter 7.3.
Output current
error.
(1) Process piping is improper.
(2) Gas or solution is mixed in.
(3) Liquid density changes.
(4) Ambient temperature changes
widely.
(5) Zero, span or fixed output current
(4, 20mA) has deviated.
(6) Amplifier unit is faulty.
Correct the piping.
Vent or drain the transmitter.
Perform density compensation.
Minimize the temperature change.
Readjust according to chapter 6.
Replace the amplifier unit according to chapter 7.3.
When the
indicator is
abnormal.
(1) An error display is appeared.
P53 capital to “contents of message”