OPERATING - TROUBLE SHOOTING - CALIBRATING SM3000
Page 4 - 6 DELTA ELEKTRONIKA B.V. rev. February 2018
TROUBLE SHOOTING
1) GEN ERAL
• In case you need as sis tance for re pair ing a unit, please con tact
our en gi neers us ing the ad dress "Support@Delta-Elektronika.nl".
• In case you want us to re pair the unit, please first fill out the
RMA-form be fore send ing the unit to us. Add ing a de tailed fault
de scrip tion will help us to re pair the unit as soon as pos si ble.
On our website www.DeltaPowerSupplies.com the RMA-form
can be found un der 'Sup port'.
2) NO OUT PUT (nor mal op er a tion)
• Check in put fuses.
• Check po si tion of prog. switches at the rear panel, they should be
on MAN UAL.
• Check the con nec tions on the SENSE BLOCK (at rear panel),
there should be a link be tween + and S+ and be tween – and S–.
• Set OVP po ten ti om e ter (at front panel) at max i mum (fully clock
wise).
• Switch on unit.
• Turn both the CV and CC po ten ti om e ter a few turns clock-wise. A
volt age should be pres ent on the out put.
3) PRO GRAMMING DOES NOT WORK OK
• Check po si tion of prog. switches at rear panel.
• The unit works OK in man ual con trol, but in pro gram ming
mode the out put volt age / cur rent has a large er ror.
Prob a bly the fuse in se ries with Ø (pin 1) of prog. connector trip -
ped, the fuse (F600 = 650 mA) is a self-resetting type (see
fig. 4 - 16).
• To check the fuse (F600) mea sure the volt age be tween Ø and the
mi nus out put, dur ing the fault con di tion. The volt age should only
be a few mV, a high volt age means that an un wanted cur rent is
flow ing through pin 1 of the prog. con nec tor.
Please check why cur rent is flow ing through pin 1 (see also next
para graph 4) and fig. 4 - 17).
4) PRO GRAMMING OFF SETS
• Un wanted off sets in the pro gram ming can be caused by
earth loops.
Fig ure 4 - 17 shows a typ i cal earthing prob lem. In case the load
has a con nec tion to earth and the pro gram ming source as well,
prob lems could oc cur. Im proper choice of the earthing point of the
load can give a volt age drop of ∆V1. Con necting the mi nus or zero
to a sep a rate earth con nec tion can give a volt age drop of ∆V2. Be -
cause the in ter nal wires of the pro gram ming in put are thin, the
volt age drops ∆V1 and ∆V2 will be across the in ter nal wir ing as
well. Re sulting in a er ror volt age in se ries with the pro gram ming
volt age.
• The best so lu tion for this is us ing a float ing pro gram ming source
with the help of the ISO AMP CARD (δ-prod uct) or a float ing load.
5) STATUS OUTPUTS FAIL
• Check fuse F601 in se ries with Ø (pin 8) (see fig. 4 - 16). To check
the fuse (F601) mea sure the re sis tance be tween Ø and the mi nus
out put, an open cir cuit means a blown fuse. F601 = 650 mA.
6) MASTER / SLAVE PAR AL LEL PROB LEMS
• Ac ci den tal in ter rup tion of a mi nus lead of a unit dur ing op er a tion
will cause fuse F600 to blow (see fig. 4 - 16). To check the fuse
(F600) mea sure the re sis tance be tween Ø (pin 1 of prog. conn.)
and the mi nus out put, the fuse is a self re set ting type.
F600 = 650 mA
• Check link be tween pin 9 and 11 on the prog. con nec tor of the
slaves
• Cur rent shar ing is not ok. Prob a bly the links be tween S– and – of
the slaves are not re moved.
fig. 4 - 16
Lo ca tion of pro gram ming fuses on P432
P432 is sit u ated on the rear panel
fig. 4 - 17
Un wanted pro gram ming off sets
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