INSTRUCTION MANUAL
HWS 3000G
TDK-Lambda
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9. External fuse rating
Refer to the following fuse rating when selecting the external input fuse.
Surge current flows when input turn on. Use slow-blow fuse or time-lug fuse. Fast-blow fuse can not
be used.
Fuse rating is specified by inrush current value at input turn on.
Do not select the fuse according to actual input current (rms.) values.
External fuse rating : 30A (Icp,mr > 100A , Icc < 1.5kA)
10. Before concluding that the unit is at fault…
Before concluding that the unit is at fault, make the following checks.
(1) Check if the rated input voltage is connected.
(2) Check if the wiring of input and output is correct.
(3) Check if the wire size is not too thin.
(4) Check if the output voltage control (V.ADJ) is properly adjusted.
(5) Check if the Remote sensing terminal is not opened.
In an open state, the output stability and accuracy will deteriorate.
(6) Check if the output current and output power are not over specifications.
(7) Audible noise can be heard when input voltage waveform is not sinusoidal wave.
(8) Audible noise may be generated from the power supply depending on the frequency at which the
load fluctuates.
(9) Check that the remote ON/OFF control terminal is connected as specified.
(10)Check if the built-in fan has stopped.
Check that the fan is not stopped due to foreign matter, dust, etc.
When the fan is stopped, the protection function cuts off the output.
(11)Power supply has ventilating holes on the front and back panels.
Check for ventilation problems due to foreign matter or dust.
(12)When using in constant voltage output mode:
Check that there is no external voltage applied to the CC terminal.
It may be operating in constant current output mode.
(13)When using constant current output mode:
Check that there is no external voltage applied to the CV terminal.
It may be operating in constant voltage output mode.
(14)Check that the wiring to the signal connector is connected correctly.
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