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8. Fan Life Expectancy.
The fan life has limitation. Following figure shows the life expectancy of fan against temperature.
Measurement point of fan exhausts temperature
Air Flow
P.S.
9. Before concluding that the unit is at fault...
Please make the following checks.
(1) Check if the rated input voltage is connected and within specification.
(2) Check if the wiring of input and output is correct.
(3) Check if the I/O terminal connection is properly tightened by required torque.
(4) Check if the wire thickness is enough.
(5)
Check if the output voltage trimmer (V.ADJ) is properly adjusted. OVP might be triggered and output is
shutdown.
(6)
Check if the built-in fan is operating. Is fan stopped or blocked by something?
(7)
Power supply has ventilating holes in front and the back. Check if there is any blockage or dust, etc.
(8)
Is the chassis of power supply abnormally hot? The output is shutdown by OTP operation.
Please disconnect or turn off the AC input and let the unit cool down sufficiently before turning ON the AC
input again.
(9) Check if the output current and output wattage does not exceed the specification.
(10) Audible noise may be heard when input voltage waveform is not sinusoidal.
(11) Audible noise may be heard during dynamic load operation.
(12) Ensure that a large capacitor is not connected across the output terminals. Please use within maximum capac-
itance shown below.
MODEL
LS200
50mm
3.3V
5V
7.5V
10,000uF
Temperature
measurement point
Maximum external capacitance
12V
15V
5,000uF
15
TDK-Lambda
LS 200 Series
INSTRUCTION MANUAL
24V
36V
48V
1,000uF
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