SQLC-214-097
77
● Caution on the use of external display selection input (option)
External power consumption is 0.4VA at AC110V or 1.4VA at AC220V or 0.4W at DC110V.
In case a relay or a switch is used for power-supply supply, please use the thing of about
1mA of the minimum application loads.
7. Maintenance and check
7.1 Trouble shooting
Symptoms Possible causes Remedial measures
Does not display.
The power supply is not supplied.
(Not connected. or voltage is low)
Check the auxiliary supply.
Again, a power supply is supplied.
Measurement display ON/OFF setting is set to
OFF.
Setting check.
Trouble of device. Replace the device.
Measuring value error
is noticeable
Range is not set correctly. Please set again.
Out of range in rated frequency (45‐65Hz). Cannot be used.
Cycle control, SCR phase angle control, PWM,
or other inverter output is measured.
Cannot be used.
Measurement display
of current leakage Igr
will be "----".
The direction of the connection to ZCT or this
product is reverse.
Please do connection correctly.
The cable run constitutes a negative phase
sequence.
Please change a setting (No.163) into “1：
one phase earth (negative phase sequence)
”.
Analog output is not
outputted.
Analog output is set to OFF or measurement
factor is set to OFF.
Please check a setting
Pulse output is not
outputted.
Pulse output is set to OFF or measurement
factor is set to OFF.
Please check a setting
Alarm output does not
return.
The return method is a "manual reset". Please check a setting
7.2 Check
Be careful with the following items periodically.
(1) Check if the measuring values, scale digits, units, etc. are displayed correctly.
(2) Check if LCD is free of a color change, breakage of case, or other defects.
(3) Check the unit for loose wiring and loose mounting screws.
(4) Please remove, if dust has adhered to the product.
7.3 Maintenance
(1) Please do not make a wiring change of the input and auxiliary supply in an energization.
(2)
In case you check an output in an energization, please warn to be unable to touch output wiring and a human
body to an input and an auxiliary supply terminal. (Please do not short-circuit a voltage output.)
(3)
Please check a connection diagram, in case you check the voltage of input, output, and auxiliary supply.
(4)
If a name-plate is wiped with solvents (an alcoholic nature), a display item may disappear.
Please wipe off with the dry cloth.
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