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TROUBLE SHOOTING
9
TROUBLE SHOOTING
9.1
GENERAL
• If you have a question about the unit, please contact our
engineers using the address Support@Delta-Elektronika.nl.
• In case the unit is defect, please first fill out the RMA-form
before sending the unit to us. Adding a detailed fault
description will help us to repair the unit as soon as
possible. Do not try to repair the unit yourself.
• On our website the RMA-form can be found under
'Support'.
9.2
NO DC OUTPUT
• Check the output is switched ON: the text 'ON/off' must be
visible on the right side of the display.
• If the text is 'on/OFF', press the button next to this text to
switch it ON if needed.
• Check the unit is not in LOCK mode: the text 'Lock' must be
visible on the right side of the display.
If the text is 'Unlock', press the button next to this text for a
few seconds to unlock the unit, see fig. 9 - 1.
• First set the unit in local operation (or so-called manual
operation): press and hold the ON/off button for 4 seconds.
On the second line of the display, before both the set
values the text 'front' will be seen, now press the button
next to the text on/OFF to switch on the output.
• Check the connections on the SENSE BLOCK (at rear
panel). For local sensing, there should be a link between +
and S+ and between – and S– (see fig. 9 - 2).
For remote sensing, the wires from S+ and S- should be
connected to respectively the + and - terminals on the load.
• Check there is a link between pin 1 and pin 3 of the
Interlock connector.
• Check the settings for CV- and CC-limit are set to a value
greater than 0.
Go to Menu -> Protection -> Limits.
Here set Voltage and Current limits.
• Turn both the CV and CC encoders a few turns clockwise.
Now a voltage should be present on the output.
9.3
PROGRAMMING DOES NOT WORK OK
• First make sure the unit works ok in local mode, see
previous paragraph.
• If this is okay, check the unit is in Remote mode.
• Go to Menu -> Configuration -> Source.
• Here set the Vsettings and Isettings to the required
programming source, either 'eth', 'web', 'slot1', 'slot2', 'slot3'
or 'slot4'.
• For example, when programming via Ethernet, on the
second line of the display, before both the set values the
text 'eth' must be seen.
• It is also possible to only have only one of the settings in
remote mode, and have the other setting in local mode.
• Enter a command to program both the CV and CC setting
to a value greater than 0.
• Now a voltage should be present on the output.
9.4
MASTER / SLAVE PARALLEL PROBLEMS
• Check the voltage drop of the wiring between the master
and the slaves is < 10 mV.
• Check the wiring has a low inductance.
• See interface manual for more trouble shooting.
9.5
OUTPUT VOLTAGE IS HIGHER THAN SET
VALUE
• Check connections on SENSE BLOCK (on rear panel), For
normal operation there should be a link between + and S+
and between – and S– (see also fig. 9 - 2 ).
• When remote sensing is used, check the wires of the
sensing.
28 / 32
DELTA ELEKTRONIKA B.V.
fig 9 - 1
At the right side, the texts must be 'Lock'
and 'ON/off'.
fig 9 - 2
For normal operation links should be connected
between S+ and +, and between S– and –.
fig 9 - 3
For Ethernet programming, the text 'eth' must be seen
before the setting(s) that is/are in 'remote mode'.
SM3300
rev. June 2022
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