MAINTENANCE & TROUBLE SHOOTING
EST150
7 / 9
DELTA ELEKTRONIKA B.V.
rev. Jan. 2021
4
MAINTENANCE & TROUBLE
SHOOTING
4.1
GENERAL
The ES-series power supplies normally need no maintenance
or calibration. Only care must be taken that the cooling of the
unit is not obstructed.
4.2
NO OUTPUT (normal operation)
Remove load from output.
Check position of prog. switches at the rear panel, they
should be on MANUAL.
Switch on unit.
Turn all the CV and CC potentiometers a few turns clock-
wise. A voltage should be present on the output.
4.3
NO LEDS on.
Overheating can be the cause, cooling down will reset the
thermal protection.
Check input power.
Check fuses inside unit.
4.4
NO equal voltages in Tracking Mode
One or both of the tracking outputs are in CC mode (CC LED
on).
Turn the CC potentiometers fully clockwise.
Reduce the load.
3.3.2
HUMIDITY
During normal operation humidity will not harm the power
supply, provided the air is not aggressive. The heat normally
produced in the power supply will keep it dry.
Condensation. Avoid condensation inside the power supply,
break-down could be the result. Condensation can occur
during a period the power supply is switched off (or operating
at no load) and the ambient temperature is increasing .
Always allow the power supply to dry before switching it on
again.
3.3.3
GALVANIC INDUSTRY
For using the power supplies in the galvanic industry it is
strongly recommended to take precautions against an
aggressive environment.
An aggressive environment with acid, salt, etc. can harm the
electronic components. Sometimes even the copper traces of
the pc-boards dissolve.
To avoid problems the power supplies should be mounted in
a relative clean room, or mounted in a cabinet receiving clean
air with over pressure. Or a cabinet with a heat exchanger.
