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7.
Troubleshooting
Troubleshooting
7.1 Warnings
Warnings come as errors and alarms. The types of errors and alarms are described below.
*
If you intend to meter negative values (exported energy), then no correction is necessary. Metering continues normally even
when a warning is displayed (A-W3). Set "Warning
ON/OFF (MENU 0B)" to OFF if you do not require the warnings (A-
F1, A-VR, A-VS, A-VT, A-W2, A-W3)
. (
※
To cancel the alarm, take the actions described to remove the cause, then switch the power on again.
Warning type
Description
Display
Action to take
LCD
display
LED
display
Error
Setting value
error
Internal memory corrupted
E-M1
Error
LED
flashing
Repair is necessary. Contact the
place of purchase or the
manufacturer.
Measured value
error
Internal memory corrupted
E-M2
Calibration value
error
A calibration value is
corrupted
E-M3
Alarm
Input frequency
warning
Measured frequency is
outside rated ranges
A-F1
Alarm
LED
flashing
Input the power and voltage with
the frequency within the rated
ranges.
V
R
open phase
warning
The voltage has not reached
the rated value.
A-VR
There may be an issue such as the
wiring to the voltage input terminal
being loose, so that voltage does not
reach the rated value for each phase
due to miss-wiring. Redo the wiring
correctly to match the phase and
wire type you are using.
V
S
open phase
warning
A-VS
V
T
open phase
warning
A-VT
Phase sequence
error
The phase sequence is
wrong for 3-phase 4-wire, 1-
phase 3-wire, or 3-phase 3-
wire connection.
A-W2
The wiring to the voltage input
terminal does not match the phase
and wire type you are using. Redo
the wiring correctly to match the
phase and wire type you are using.
Active power is a
negative value
Active power is a negative
value. (The voltage and
current phase may not match
due to incorrect wiring.)
A-W3
Redo the wiring correctly
according to the situation.*
Pulse 1
Output warning
•
Pulse is output again
while a pulse is being
output
•
Pulse is output during a
period when the pulse is
off
A-P1
Change the pulse output unit so that
pulses are not output while other
pulses are being output.
Pulse 2
Output warning
A-P2
Pulse 3
Output warning
A-P3
Pulse 4
Output warning
A-P4
