Instruction manual

56
<Indication>
Problem Presumed cause and solution
[ ] is flashing
on the PV display.
• Thermocouple or RTD 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 approximate 0 (32 ) is indicated, the
instrument is likely to be operating normally, however, the
sensor may be burnt out.
• Check whether the input terminals of thermocouple, RTD
are securely mounted to the instrument input terminals.
[ ] is flashing
on the PV display.
• Check if polarity of thermocouple or compensating lead
wire is correct.
• Check whether codes (A, B, B) of RTD agree with the
instrument terminals.
The indication of PV
display is irregular
or unstable.
• Check whether sensor input or temperature unit ( or )
is correct.
Set the sensor type which is the same as users’ and the
temperature unit during the Input type selection [ ].
(p.16)
• Sensor correcting value is unsuitable. Set it to a suitable
value during the Sensor correction setting [ ] in
Auxiliary function setting mode 1. (p.31, 41, 42)
• AC leaks into thermocouple or RTD circuit.
• There may be equipment that interferes with or makes noise
near the controller.
Keep equipment that interferes with or makes noise away
from the controller.
[ ] is indicated
on the PV display.
• Internal memory is defective.
Contact our agency or us.
<Keypad operation>
Problem Presumed cause and solution
It is impossible to
select a program
pattern number.
• The program control is running.
Change the mode.
The program pattern number can only be selected during
the Program standby mode.
Settings or selections
are impossible.
• Set value lock [ ] is designated during the Set value
lock selection in Auxiliary function setting mode 1.
Release the lock designation and set to [ ]. (p.31)
• Auto-tuning is performing.
Cancel auto-tuning if necessary. (p.28)