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12. Troubleshooting
Warning
Turn the power supply to the instrument off before wiring or checking. Working on or
touching the terminal with the power switched on may result in severe injury or death due
to electrical shock.
Moreover, the instrument must be grounded before the power supply to the instrument is
turned on.
If any malfunctions occur, refer to the following items after checking that power is being supplied to
the controller.
12.1
Indication
Problem
Possible Cause
Solution
The PV Display
indicates
er01
.
Internal non-volatile IC memory is
defective.
Cancel the error code by pressing the
MODE key, and perform data clearing.(p.85)
If the problem is not still solved after power
is turned ON again, contact our agency or
us.
The PV Display
indicates
er02
.
Data writing (in non-volatile IC
memory) error when power failure
occurs.
Cancel the error code by pressing the
MODE key, and perform data clearing.
(P.85)
The PV Display
indicates PV and
er05
(*)
alternately.
Overscale.
PV has exceeded Input range high
limit value (scaling high limit value
for DC voltage, current inputs).
Check the input signal source.
The PV Display
indicates PV and
er06
(*)
alternately.
Underscale.
PV has dropped below Input range
low limit value (scaling low limit
value for DC voltage, current
inputs).
Check the input signal source and wiring of
input terminals.
The PV Display
flashes
~~~~
.
The PV Display
indicates
~~~~
and
er07
(*)
alternately.
PV has exceeded the Indication
range and Control range.
Check the input signal source.
Burnout of thermocouple, RTD or
disconnection of DC voltage
(0 to 1 V DC)
Replace each sensor.
How to check whether the sensor is
burnt out:
[Thermocouple]
If the input terminals of the instrument are
shorted, and if a value around room
temperature is indicated, the instrument is
likely to be operating normally, however, the
sensor may be burnt out.
[RTD]
If approx. 100
of resistance is connected
to the input terminals between A-B of the
instrument and between B-B is shorted, and
if a value around 0
(32 ) is indicated, the
instrument is likely to be operating normally,
however, the sensor may be burnt out.
[DC voltage (0 to 1 V DC)]
If the input terminals of the instrument are
shorted, and if a scaling low limit value is
indicated, the instrument is likely to be
operating normally, however, the signal wire
may be disconnected.
(*) Available when ‘Enabled’ is selected in [Error indication].
Содержание PCB1
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