When A Failure Is Suspected; Table 8-3 Actions When A Failure Is Suspected - NF DP015S Instruction Manual

8.2

When a Failure is Suspected

When a symptom occurs that suspects a failure, take an action according to Table 8-3. If it does not
solve the problem, contact the seller (NF Corporation or our agent) from whom you purchased the
product.
Category
Problem at The product does
power not start
on/off operating when
the power switch
is turned on.
The product does
not stop
immediately
when the power
switch is turned
off.
LCD shows
nothing (fan is
rotating).
Problem at Panel operations
key cannot be
operation performed.
Numerical
values cannot be
entered through
the numeric
keypad.
Problem at At start-up, the
output previous settings
setting are not kept.
The output
voltage range
cannot be
switched.
The output
voltage cannot
be set.
The output
frequency cannot
be set.
DP Series

Table 8-3 Actions When a Failure is Suspected

Symptom Possible Cause
The power is not
connected.
The power supply is out
of the rated range.
The internal fuse is
blown.
It is not abnormal. The
product automatically
stops after the internal
voltage decreases to a
sufficiently safe level.
The LCD contrast is
low. The ambient
temperature may be
changed from the time
when the contrast was
adjusted.
The key lock is set to
on.
Keys or dials are
deteriorated.
It is in the shift state
(the SHIFT key LED
illuminates).
They are not saved in
the setting memory No.
1.
The output is on.
The signal source is set
to EXT or VCA.
You are trying to set a
value that is out of the
setting range.
The signal source is set
to EXT or SYNC.
You are trying to set a
value that is out of the
setting range.
8.2 When a Failure is Suspected
Necessary Actions
Connect the product to the power
supply. → 2.4
Use the power supply within the
rated range. → 2.4
Ask us or our agent for repair.
Please wait for a moment. It will
stop in about five seconds.
Increase the LCD contrast. If the
LCD display is completely
invisible, perform the Shortcut
operation +
adjust the contrast. Then, the digit
cursor is placed on the tenths
place. → 4.27
Set the key lock to off. → 4.25
Ask us or our agent for repair.
Press the SHIFT key to exit from
the shift state. → 3.3.7
At start-up, the settings in the
setting memory No. 1 are recalled.
→ 4.8.1
Turn the output off before
switching the output voltage
range. → 3.4.2
Change the signal source. → 3.4.1
Check for the voltage setting
range limit (see 4.1.3).
This value cannot be set when the
signal source is EXT and SYNC.
Change the signal source. → 3.4.1
Check for the frequency setting
range limit (see 4.1.4).
to
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