Mitsubishi Electric ME96NSR, Руководство пользователя

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54
7.8 Troubleshooting
In the case of abnormal noise, odor, smoke, heat generation from this instrument, turn it off at once. And if you
think the instrument is erroneous, please check the followings before asking for repair.
expected cause
Auxiliary power supply is not
impressed on MA and MB terminals.
This is not an error. For about 5 seconds
after auxiliary power source is charged,
initialization of internal circuit is carried out.
The back light is set to auto off.
It may become black owing to static electricity.
set-up is on its way.
Settings of primary voltage and
primary current are erroneous.
Wiring is erroneous.
If the input current is smaller than
the rating, error becomes large.
(about 5% or below of rated
current)
is pressed continuously.
When the set-up items of the set-up menu
1 are changed, initialization is carried out.
When the set-up items of the set-up menu
1 are changed, initialization is carried out.
Distortion ratio (containing ratio)
exceeds 100% largely. (measurement
of secondary output of inverter)
The active power value by the calculation
and the measurements might be largely
different when there are a lot of
harmonics elements.
When is pressed for 2 seconds,
the set value confirmation mode gets
in, and some items cannot be changed.
RESET
SET
The display is not lit.
When the auxiliary power
supply is impressed, display
is not lit soon.
The back light is not lit.
The display becomes black.
“End” display remains.
Measured value error is
large.
Measured values of W, var,
cos f are including large
errors.
Measured values of cos f is
including large error.
Maximum value is not held.
Maximum value and
minimum value changed.
Index indicator and alarm value
changed.
The harmonic total RMS value of
harmonic current (HI) is largely
different from current (A) value.
The active power value calculated
by the current, the voltage, and the
power factor is largely different from
measured value of active power.
Set-up cannot be made even
when is pressed.
SET
Condition Solution
Impress auxiliary power supply.
Use it as it is.
When any of the operation key is
pressed, it is lit for 5 minutes. Use it as
it is, or change the setting to continuous
lighting in the set-up menu 4.
It goes off after a while.
Press .
Check the set value in the set
value confirmation mode.
Check the wire.
This is not an error, or use it as it
is, or if error is troublesome,
change the CT to one to meet the
actual use current.
Release .
Record before changing set-up.
Set once again.
Check measured environment.
The active power value that the
instrument measured is correct.
Press and
simultaneously for 2 seconds to
get into the set-up menu.
SET
SET
RESET
Displa
y
Measurement error
Oper
ation
RESET
■
After Service
For any questions about the instrument’s performance or whether the instrument has a problem, contact our
service network. (refer to the last page of this user’s manual.)
●
The period of guarantee is earlier date of either 18 months from the manufacture date or 1 year from the sale
date, except in the case that the failure has been caused by bad handling of the product, provided that it has
been installed according to the manufacture’s instructions.
7. Others