Kikusui PWX750ML, User Manual

Page: 104 / 110

104
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 volt-
age range. p.86
The ripple increased when the
PWX750ML was installed in a
different location. Is something nearby generating a strong
magnetic or electrical field? Take measures such as moving the
PWX750ML away from the field sources
or twisting the cables connected to the
PWX750ML. —
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,
disconnect the remote sensing cables. p.20
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. p.20
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. p.20
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). p.20
Are you using external control with a loose
control cable? Connect the cable correctly. p.54
Is the external voltage excessive during
external control? Apply the correct voltage. p.59
p.61
Is the internal temperature too high? The overheat protection function has been
activated. Check the operating environ-
ment. p.34
p.93
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 PWX750ML may be overloaded.
Check the load. p.50
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. p.49
Is the REMOTE LED lit? To control the PWX750ML from the panel,
press the LOCAL switch to switch to local
mode. p.50
Is the PWX750ML being controlled via the
RS232C, USB, or LAN interface?
The PWX750ML 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