Dwyer SCZ10 - Manual (Page 20)

12. Troubleshooting
If any malfunctions occur, refer to the following items after checking the power supply and wiring.
Indication
Phenomenon Presumed cause and solution
“ ” is blinking on the PV
display.
• Sensor (Thermocouple, RTD and DC voltage
[0 to 1Vdc] input) is burnt out.
Change the sensor for new one.
• The lead wire of the sensor (Thermocouple, RTD and DC
voltage [0 to 1Vdc] input ) is not securely connected.
Connect it to the terminal properly.
The indication on the PV display
does not change. • Sensor (DC current [0 to 20mAdc] and DC voltage
[0 to 10Vdc]) is burnt out.
Change the sensor for the new one.
• The lead wire of the sensor (DC current [0 to 20mAdc] and
DC voltage [0 to 10Vdc] is not securely connected to the
terminal.
Connect the sensor lead wire securely to the instrument
terminal.
“ ” is blinking on the PV
display.
• Sensor (DC current [4 to 20mAdc] and DC voltage[1 to 5Vdc]
input) is burnt out.
Change the sensor for the new one.
• The sensor lead wire is not securely connected to the
terminal (DC current 4 to 20mAdc) and DC voltage
[1 to 5Vdc]
Connect the sensor lead wire securely to the terminal of
the instrument.
The indication on the PV display
is abnormal or unstable.
• Designation of the sensor (input) is incorrect.
Set the correct sensor (input).
• The polarity of the sensor input is incorrect.
Wire it correctly.
• Temperature unit (°C/°F) is mis-selected.
Set the correct unit.
• AC is leaking from controlled object to thermocouple or RTD.
Keep AC from leaking into the controlled object.
“ ” is indicated on the
PV display.
• Internal memory is out of order.
Please contact our sales branch or the shop where you
purchased this unit.
Key operation
Phenomenon Presumed cause and solution
• Setting values do not change
even if the or key is
pressed during setting mode
• Mode1 or mode 2 is selected in setting value lock selection.
Cancel the Lock mode.
• PID auto-tuning is performing.
Cancel PID auto-tuning.
• Unable to set the value beyond
or below scaling high limit or low
limit within the rated scale range
even if the or key
is pressed.
• The value of scaling high limit setting or low limit setting in
auxiliary function setting mode 2 is set to still one.
Set the proper value.
• If you have any inquiries, please contact us or the shop where you purchased the unit.