126
PWX
Troubleshooting
The output ripple is large
The ALARM LED lights when the OUTPUT switch is turned on
Unable to perform panel operations
Symptom
Items to Check
Remedy
The ripple sometimes
becomes large.
Is the input voltage outside the range? Apply a voltage that is within the input voltage
range.
The ripple increased when the
PWX series was installed in a
different location.
Is something nearby generating a
strong magnetic or electrical field?
Take measures such as moving the PWX
series away from the field sources or twisting
the cables connected to the PWX series.
—
The output ripple is large dur-
ing external control.
Is there a large amount of external
voltage noise?
Take measures against noise.
—
The ripple increased when the
load cable was changed.
Are the remote sensing cables con-
nected?
When you are not using remote sensing, dis-
connect the remote sensing cables.
Symptom
Items to Check
Remedy
The ALARM LED lights when
the OUTPUT switch is turned
on.
Are the remote sensing cables and the
sensing connectors connected?
When you are not using remote sensing,
connect the sensing connectors in local
sensing mode.
Are the polarities of the remote sensing
cables connected in reverse?
The polarities of the remote sensing
cables may be connected in reverse, or
the ends of the cables may be shorted.
Check the load cables.
Are you using remote sensing with long
load cables?
Set up the environment so that the voltage
drop in each load cable is within the com-
pensation voltage range (4 V for a single
line).
Are you using external control with a loose
control cable?
Connect the cable correctly.
Is the external voltage excessive during
external control?
Apply the correct voltage.
Is the internal temperature too high?
The overheat protection function has been
activated. Check the operating environ-
ment.
The louver may be clogged, or the fan
may be broken. Check them.
—
The ALARM LED lights when
the load is changed.
Is a large external voltage—such as that
of a battery load—being applied?
The overvoltage protection function or the
overcurrent protection function may have
been activated. Check them.
The PWX series may be overloaded.
Check the load.
Is the actual output voltage higher than the
set voltage that is displayed on the panel?
Is a special load connected?
Symptom
Items to Check
Remedy
Unable to perform panel oper-
ations.
Is the LOCK LED lit?
Release the panel operation lock.
Is the REMOTE LED lit?
To control the PWX series from the panel,
press the LOCAL switch to switch to local
mode.
Is the PWX series being controlled via the
RS232C, USB, or LAN interface?
The PWX series does not
switch to local mode even
when the LOCAL switch is
pressed.
Was a local lockout (llo) command sent
through the communication interface?
Send the “SYST:LOC” communication
command to clear the local lockout (llo)
status.
—
See
See
See
Содержание PWX1500H
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Страница 89: ...Maintenance This chapter explains how to perform cali bration DELETE...
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