Kikusui PAN 110-1.5A, Руководство по эксплуатации

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PAN-A 6-13
Chap
.6
Maintenance
1
■
Symptom 5: No output is generated or the output is unsta-
ble even when the OUTPUT switch is turned on.
Check item Cause and remedy
Check to see if the
operation mode
changes from CV
to CC or CC to CV.
• Turn the control knob (VOLTAGE or CURRENT)
that has been clamped, in the clockwise direction. If
the knob has already been turned fully clockwise, it is
necessary to use a power supply with greater capac-
ity.
Check that the
SENS switch is not
on.
• The SENS switch should be off when the remote
sensing function is not used.
Check to see if it
has been more than
30 minutes since a
power-on.
• The output is unstable due to initial drift. Carry out a
warm-up (power application) for at least 30 minutes.
Check to see if
both the "CV" and
"CC" LEDs are lit.
• Input voltage is low, i.e., below the input voltage
range. Supply voltage within the input voltage range.
• Ambient temperature is less than the operating ambi-
ent temperature. Use the unit within a range of 0 ˚ C
to 40 ˚ C.
• If remote sensing and master-slave-control parallel
operations are carried out, causing oscillation, add a
capacitor to the load end. See
"4.2 Remote sensing"
and "4.4 Master-slave-control parallel operation".
• The internal circuit may be faulty. If a load such as
battery is connected to the output terminals directly,
the internal circuit may break or the output fuse may
blow. See the item "Load" in "2.4 Load". Stop using
the unit immediately and contact us for repair service.
Check to see if cur-
rent
fl ows even
though no load is
connected.
• The internal circuit may be broken. If a capacitor of
large capacity or a battery is connected in reverse
polarity, a diode for preventing reverse connection
will break. Stop using the unit immediately and con-
tact us for repair service.
Check to see if out-
put is generated
even though the
OUTPUT switch is
turned off.
• The internal circuit may be broken. Application of
voltage higher than the rating of the unit to the output
terminals will cause the bleeder circuit to break. If a
load such as a battery is connected to the output ter-
minals directly, the power transistors will break. Stop
using the unit immediately and contact us for repair
service.