Delta Elektronika SM 15-400 Product Manual

Also see for SM 120-50: Product manual Manual Manual

Contents

Delta Elektronika SM 15-400 Product Manual Manual pdf 17 page image

SM6000 DELTA ELEKTRONIKA BVRev. Sept. 2012 OPERATING MAINTENANCE TROUBLE SHOOTING CALIBRATING Page 4 - 6TROUBLE SHOOTING1) GENERAL• In case you need assistance for repairing a unit, please contactour engineers using the address "Support@Delta-Elektronika.nl".• In case you want us to repair the unit, please first fill out theRMA-form before sending the unit to us. Adding a detailed faultdescription will help us to repair the unit as soon as possible.On our website www.DeltaPowerSupplies.com the RMA-formcan be found under 'Support'.2) NO OUTPUT (manual control)• Check the LED’s ‘Remote CV’ and ‘Remote CC’ on the frontpanel, they should be off. Disable Keylock and press the RE-MOTE/LOCAL switch to turn both LED’s off.• The LED ‘Output On’ should be on. If this LED is off, disable Key-lock and push the button ‘OUTPUT ON/OFF’.• Check the connections on the SENSE BLOCK (at rear panel),there should be a link between + and S+ and between – and S–(see fig. 4 - 16).• Check if there is a link in the Interlock connector (if not, the RSDLED will be on).• Set both the CV- and CC-limit potentiometer (at front panel) atmaximum (fully clockwise).• Turn both the CV and CC potentiometers a few turns clockwise.A voltage should be present on the output (for sm300-20 /sm600-10 and units with Option P220 first remove the Keylockfunction before the CV and CC knobs can be turned, see par. 2) inprevious chapter "operating manual").• Turn both the CV and CC potentiometers a few turns clockwise. Avoltage should be present on the output.3) PROGRAMMING DOES NOT WORK OK• Check the unit is in Remote mode (Remote CV and/or Remote CCLED should be on).• The unit works OK in manual control, but in programmingmode the output voltage / current has a large error.Probably the fuse in series with Ø (pin 1) of programmingconnector tripped, the fuse (F27_1 = 650 mA) is a self-resettingtype (see fig. 4 - 14).• To check the fuse (F27_1) measure the voltage between Ø andthe minus output, during the fault condition. The voltage shouldonly be a few mV, a high voltage means that an unwanted currentis flowing through pin 1 of the prog. connector.Please check why current is flowing through pin 1, see also nextparagraph 4) and fig. 4 - 15.4) PROGRAMMING OFFSETS• Unwanted offsets in the programming can be caused byearth loops.Figure 4 - 15 shows a typical earthing problem. In case the loadhas a connection to earth and the programming source as well,problems could occur. Improper choice of the earthing point of theload can give a voltage drop of ΔV1. Connecting the minus or zeroto a separate earth connection can give a voltage drop of ΔV2. Be-cause the internal wires of the programming input are thin, thevoltage drops ΔV1 and ΔV2 will be across the internal wiring aswell. Resulting in an error voltage in series with the programmingvoltage.• The best solution for this is to use a floating programming source,a floating load or the optional internal ISO AMP CARD (δ-product).5) STATUS OUTPUTS FAIL• Check fuse F27_2 in series with Ø (pin 8 of CON E), see fig. 4 - 14.To check the fuse measure the voltage between Ø and the minusoutput, a high voltage means too much current flowing through thefuse. F27_2 = 650 mA, self resetting.fig. 4 - 14Location of programming fuses on P598P598 is situated directly behind the rear panelfig. 4 - 15Unwanted programming offsets