Maintenance; Fault-Finding; Stand-By Led On The Frontplate - ABB REG316 4 Series Operating Instructions Manual

REG 316*4 1MRB520049-Uen / Rev. C
7.4.

Maintenance

Because of the self-testing and monitoring features included, the
equipment requires neither special maintenance nor periodic
testing.
Where testing is considered necessary, the following procedure
is recommended:
· Measure the currents and voltages in the secondaries of the
main c.t's and v.t's and compare the results with the values
displayed by the HMI.
· Test the external circuits using the test functions provided by
the HMI
The life of the wet electrolytic condensers is about 20 years. This
assumes a mean ambient temperature outside the casing of
40 °C. An increase of 10 °C shortens the life by half and a de-
crease of 10 °C extends it by half.
7.4.1.

Fault-finding

7.4.1.1.

Stand-by LED on the frontplate

The following may be possible causes, should the green stand-
by LED not light continuously, but be extinguished or flash al-
though the auxiliary supply is switched on:
Stand-by LED extinguished
· The auxiliary supply unit Type 316N65 is not properly in-
serted or is defective. Insert properly or replace the unit.
· The input/output unit Type 316DB6. is not properly inserted
or defective. Insert properly or replace the unit.
· The logic processor Type 316VC61a or 316VC61b is defec-
tive. Replace either the main processor unit or the complete
equipment.
Green stand-by LED flashes
· The equipment does not have a valid set of parameter set-
tings.
· The active set of parameters and the 'software key' do not
agree.
(see Section 5.9.).
ABB Switzerland Ltd
7-17