User manual

TDK-Lambda

LS 25-150 Series

INSTRUCTION MANUAL

7. External Fuse Rating

Refer to the following fuse rating when selecting the external input fuse. Surge current flows when input turns on.

Fuse rating is specified by Inrush Current value at input turn on. Do not select the fuse according to input current (rms)

values under the actual load condition.

LS25 : F1.6A , 250V

LS35, LS50 : T2A , 250V

LS75 : T2.5A , 250V

LS100 : F4A , 250V

LS150 : F5A , 250V

8. Before concluding that the unit is at fault, make the following checks.

z Check if the rated input voltage is connected.

z Check if the wiring of input and output is correct.

z Check if the wire size is correct.

z Check if the output voltage trimmer (V.ADJ) is properly adjusted.

z Check if the output current and output wattage does not exceed the specification.

z Ensure that a large capacitor is not connected across the output terminals. Please use within maximum capacitance

shown below.

Maximum external capacitance

MODEL 3.3V 5V 12V 15V 24V 36V 48V

LS25 10,000uF 5,000uF 2,000uF 1,000uF 500uF

LS35~LS50 10,000uF 5,000uF 2,000uF 500uF

LS75~LS150 10,000uF 5,000uF 1,000uF

NOTE : It is normal to hear audible noise from power-supply under Dynamic Load operation or if the input voltage

waveform is not sinusoidal.

9. Warranty Condition

This product is under warranty for 3 years (based on 8 hours/day operation) from the date of shipment. During the

warranty period, TDK-Lambda will, at it’s option, either repair or replace products prove to be defective.

Warranty applies but not limited to the following.

(1) Average operating temperature (ambient temperature of the power supply unit) is under 40

(2) Average load factor is 80% or less.

(3) Installation method : Standard installation.

Following cases are not covered by warranty.

(1) Improper usage and mis-handling like dropping or applying shock to the unit and defects from operation

exceeding specification of the product.

(2) Defects resulting from natural disaster (fire, flood).

(3) Unauthorized modification or repair.