7
•
Red LED’s
A
OVP,
B
OVP,
C
OVP
(on unit PCB) indicates overvoltage protection status for a particular group: A,
B, C. In case of protection activation, a correspondent LED lights
(
AOVP
the group of A outputs etc.).
Fig.3. The view of LED panel.
4.
Service and operation
.
4.1 Procedure in case of short-circuit (activation of SCP) of the power supply output.
Outputs of the O1÷O9 power supply are protected against short-circuits with fuse-element safety device (inserts)
or PTC. In case of damaging fuse-element safety device it is necessary to exchange the fuse (compliant with the
original).
If PTC polymer fuses protection was chosen, then automatic disconnection of the output voltage was signalled by
switching off the green diode. It is then necessary to disconnect the load from the power supply output for the period of
about 1 min.
It is acceptable to change values of fuses to other than original, if not all outputs of power supply are used
and Pmax is not exceeded.
4.2 Procedure in case of overload (activation of OLP) of the power supply output.
Sections A, B, C are equipped with the PTC protection based on polymer fuses. In case of overload of section
with the current which exceeds value 1,6A, the overloaded section will be automatically disconnected. It is signalized by
turnig off LED’s of overloaded section. Return of output voltage require turning off the overloaded section or 230V AC
supply for about 1 minute time.
4.3 Maintenance.
All maintenance operations can be performed after the power supply is disconnected from the power network. As
for the power supply, it is not necessary to perform any special maintenance operations, but if the power supply interior
is significantly dusty, it shall be vacum-cleaned by compressed air. In case of fuse replacement, the spare parts shall be
the same as original ones.