7-8 Maintenance PLZ-U
An alarm occurs.
Symptom Check Items Remedy Reference
An alarm occurs. Check the alarm number.
Check the alarm type and
carry out the appropriate
remedy.
Section 4.4, “Protec-
tion Functions and
Alarms”
The UVP trips
during switching.
Is there a large loop in the load
wire?
Shorten and twist the load
wire.
Section 2.7.1, “Precau-
tions Concerning Wir-
ing”
The RVP trips.
Is there a large loop in the load
wire?
Shorten and twist the load
wire.
Section 2.7.1, “Precau-
tions Concerning Wir-
ing”
Is negative voltage applied to the
load input terminal?
• Immediately turn off the
output of the equipment
under test.
• Be sure to match the
polarities between the
load input connector and
the equipment under test.
Section 4.4, “Protec-
tion Functions and
Alarms” and section
2.7.1, “Precautions
Concerning Wiring”
When the PLZ70UA is used, do
you turn on/off of the DUT?
Set to avoid the alarm
occurance.
“When the DC power
supply and the DUT
are connected in series,
and turning on/off of
the DUT.” in section
4.2, “Load On/Off”
The OHP trips.
Is the air outlet blocked?
Allow at least 20 cm
between the air outlet and
the wall. Do not place
objects within 20 cm.
Section 2.2, “Precau-
tions Concerning
Installation Location”
Is the dust filter clogged? Clean the dust filter.
Section 7.1.2, “Clean-
ing the Dust Filter”