Kikusui PAD-L III Series, Руководство по эксплуатации

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PAD-L Maintenance 6-17
6.5 Malfunctions and Causes
This section describes some symptoms of possible malfunctions encountered during
use of the unit, along with appropriate remedies.
Here, we provide five typical symptoms and possible check items for each; you
simply find the relevant item. Ideally, you will be able to cure these symptoms
without difficulty.
When you find a relevant item, follow the corresponding remedy. If this does not
solve or improve the problem, or if no relevant item can be located, please contact
Kikusui distributor/agent.
For inquiries, use the follow-up sheets at the end of this Operation Manual.
Symptom 1: The POWER switch is shut off after being turned on.
Check item Possible cause and remedy
The overvoltage protection circuit has been
tripped. • The set voltage for overvoltage protection is too low
with respect to the output voltage.
The shorting bar connecting terminals 0 and 1
or terminals 3 and 4 of the control terminal
board has been removed or is loose.
• Install the shorting bars properly.
The fan has stopped. • The temperature protection circuit has been tripped.
The fan needs to be replaced.
The AC line voltage is extremely distorted. • Connect the unit to another line of the switchboard.
None of the above • The protective circuit has been tripped due to a
failure of the rectifier circuit.
Symptom 2: No output at all, or output by only a small amount
Check item Possible cause and remedy
The input fuse is blown. • The input voltage is too high. In this case, an internal
part may be damaged, requiring repair.
Contact Kikusui distributor/agent.
The lamp has gone off. • A break in the AC power cord
Lamps turn on and off in sequence, causing
the operation range to shift.
• The constant voltage or constant current setting range
is too narrow.
The shorting bar connecting terminals 5 and 6
of the control terminal board has been
removed or is loose.
• Install the shorting bar properly.
The output fuse has been blown. • A current exceeding the rated value may have flowed.
A current flows even when no load is
connected.
• The protective diode inserted in parallel to the output
is defective.
Connecting a battery to the opposite polarity will burn
out the diode.
None of the above • A defective circuit