Kikusui PWX750ML, User Manual

Page: 103 / 110

PWX
103
Troubleshooting
App
Unable to set the output voltage or output current correctly
The output is unstable
Symptom Items to Check Remedy
The output voltage cannot be
set correctly. Have you tried to specify a value that is
higher than the OVP trip point? You cannot set the output voltage to a
value that is 95% of the OVP trip point or
higher. Check the OVP trip point. p.32
Have you tried to set a voltage value that
is lower than the voltage value that is
specified by UVL? You cannot set the output voltage to a
value that is lower than the voltage that is
specified by UVL. Check the voltage that
is specified by UVL. p.34
The output current cannot be
set correctly. Have you tried to specify a value that is
higher than the OCP trip point? You cannot set the output current to a
value that is 95% of the OCP trip point or
higher. Check the OCP trip point. p.32
Symptom Items to Check Remedy
When the output is on, turning
the VOLTAGE knob or CUR-
RENT knob results in unstable
output. Is the operation mode switching from CV
to CC or CC to CV? Change the setting (output voltage or out-
put current) that is limiting the output to a
value greater than the present setting. If
the setting is at maximum, you must use a
power supply that has a larger output volt-
age or current. p.29
p.100
The output voltage or output
current fluctuates. Are you using master-slave parallel opera-
tion? Compared to independent operation, the
performance degrades slightly during
master-slave parallel operation. —
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 both the CV and CC LEDs turned on? If the output is oscillating when you are
using remote sensing, insert a capacitor
across the load.
The circuit may be malfunctioning. Imme-
diately stop using the PWX750ML, and
have it repaired. p.20
Do the sensing cables or load cables have
poor contact, or are the cables broken? Turn the POWER switch off, and check
the wiring. p.12
Does the load current have peaks, or is it
pulse shaped? The peak values may be exceeding the
set constant current. Increase the set con-
stant current or increase the current
capacity. p.29
The output voltage is offset
from the voltage that the
PWX750ML was generating
when it was turned on. Has 30 minutes passed since the power
was turned on? Warm up the PWX750ML for at least 30
minutes. —
The output voltage does not
decrease even when the fall
time elapses. Is the breeder circuit on/off setting set to
oFF? If the breeder circuit on/off setting is set to
oFF, the voltage that was present when
the output was on will remain. Set the
breeder circuit on/off setting to on. p.41
See
See