SM1540-D SM7020-D SM3004-D DELTA ELEKTRONIKA BV
1989 rev. May 2008 OPERATING MAINTENANCE TROUBLE SHOOTING CALIBRATING Page 4 - 5
OPERATING AND STORAGE CONDITIONS
1) TEM PER A TURE
• The op erating tem perature range at full load is -20 to +50 °C.
But this tem perature range only holds when the per forated bottom
and cover are un obstructed and the temperature of the air en ter-
ing is not higher than +50 °C. See fig. 4 - 15.
• Please note: a lower temperature ex tends the life of the
power supply.
• When the power sup ply is mounted in a cabinet please note that
the temperature of the air en tering should be kept low. Also avoid
a short circuit in the air flow i.e. hot air leav ing the per forated cover
en ter ing the bot tom again.
• The storage tem perature range is -40 to +85 °C.
2)
HU MID ITY
• During nor mal op eration hu midity will not harm the power sup ply,
provided the air is not ag gressive. The heat nor mally pro duced in
the power sup ply will keep it dry.
• Con den sa tion. Avoid con densation in side the power sup ply,
break-down could be the re sult.
Condensation can oc cur dur ing a pe riod the power sup ply is
switched off (or op erating at no load) and the am bient temperature
is de creas ing .
Always al low the power supply to dry be fore switching it on again.
3)
GAL VANIC IN DUS TRY
• For us ing the power supplies in the gal vanic in dustry it is strongly
rec om mended to take pre cau tions against an ag gres sive en vi ron -
ment.
• An ag gressive en vironment with acid, salt, etc. can harm the elec -
tronic components. Some times even the cop per traces of the
pc-boards dis solve.
• To avoid problems the power sup plies should be mounted in a rel -
ative clean room, or mounted in a cab inet re ceiving clean air with
over pressure. Or a cab inet with a heat exchanger.
MAINTENANCE
1) GEN ERAL
• The SM-series power sup plies nor mally need no main tenance or
calibration. Only care must be taken that the cool ing of the unit is
not ob structed.
TROUBLE SHOOTING
1) GEN ERAL
• In case you need as sistance for re pairing a unit, please con tact
our en gineers 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
description will help us to re pair the unit as soon as pos sible.
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 voltage se lector at rear panel. Wrong se lection can
cause se rious dam age to the unit. Do not op erate the selector
switch when the unit is switched on.
• Check in put fuses. For 110 V op eration fuses have to be replaced.
See text at rear panel for val ues.
• Check po si tion of prog. switches at the rear panel, they should be
on MAN UAL.
• Check the connections on the SENSE BLOCK (at rear panel),
there should be a link be tween + and S+ and be tween – and S–.
fig. 4 - 15
Leave enough space be low and above the unit
the let the air flow through it.
fig. 4 - 16
Location of the input Se lector Switch and
the input fuses at the rear panel
switch
fuse
fuse
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