TDK-Lambada HWS?HWS, User Manual, Page: 111 / 133

111
・All specifications are subject to change without notice.
Instruction Manual
HWS
HWS HD
HWS ME
HWS-P
HWS
1500
5. External Fuse Rating
Refer to the following fuse rating when selecting the external
fuses for input line. Surge current fl ows when line turns on. Use
slow-blow fuse or time-lug fuse. Do not use fast-blow fuse. Fuse
rating is specifi ed by in-rush current value at line turn-on. Do not select the fuse according to input current (rms.) values under
the actual load condition.
HWS1500：30A
6. Troubleshooting
Before concluding that the unit is at fault, make the following
checks.
(1) Check if the rated input voltage is apply.
(2) Check if the wiring of input and output is correct.
(3) Check if the I/O terminal connection is properly tighten by a
regulated tightening torque.
(4) Check if the wire material is not too thin.
(5) Check if the output voltage control (V.ADJ) is properly
adjusted. OVP might be trigged and output is cut off .
(6) Check if the wiring of +S and -S terminal is correct.
If in open condition, the stability and the accuracy of the
output deteriorate.
(7) If use function of the remote ON/OFF control, check if the
remote ON/OFF control connector is not opened.
If in open condition, output is cut off .
(8) Check if the built-in fan is not stopped. Is fan stopped by
something irregulars or dust, etc.
If fan stops, the PF signal is turn on.
Moreover, the output is intercepted with the protection
circuit if fan stops.
Fans are the limited life parts.
(9) This power supply has ventilating holes on the front and
back panels. Check if there is any irregulars or dust, etc.
(10) Is the main body of the power supply abnormally hot?
Please turn on the input again after allowing the unit
to cool down sufficiently. The output shut down by over
temperature protection function.
(11) Check if the output current and output power is not applied
over specifi cation.
(12) Check if the input voltage wave is sinusoidal. If this power
supply unit is connected to a UPS, input voltage wave
might not be sinusoidal. An audible noise is emmited from
the power supply unit.
(13) Audible noise can be heard during Dynamic-Load operation.
4. Wiring Method
⑴ The output load line and input line shall be separated and
twisted to improve noise sensitivity.
⑵ The sensing lines shall be twisted or shield wire and sepa-
rated from the output lines.
⑶ Use all lines as thick and short as possible to make lower
impedance. Wires are to be twisted or use shield wire to im-
prove noise sensitivity.
⑷ Attaching a capacitor to the load terminals can eliminate
noise.
⑸ FG terminal of this power supply is functional earthing.
For safety purposes, connect protective earthing terminal to
the mounting set ground terminal.
⑹ Recommended torque for the terminal piece:
⑺ Recommended wiring
⑻ M4 screw for output terminal might damage the terminal s in-
ner thread. This is mainly cause by the M4 screw s unthread
section. Therefore, please select a washer, spring washer,
etc. to avoid unthread screw section from penetrating into
output terminal inner section.
AC（N）
AC（L）
AC（N）
AC（L）
AC（N）
AC（L）
AC（N）
AC（L）
FG
＋
−
Load
HWS1500
Chassis of
the equipment
Circuit
Protector
Noise Filter
Input terminal (M4 screw) : 1.27 N･m
Output terminal (M8 Bolt & Nut) : 10.8N・m
Output terminal
Unthread section
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