17
Fault codes
Once the self-supervision system has detected a
permanent relay fault, the IRF LED on the front
panel of the module is lit, and at the same time
the normally operated signal relay of the self-
supervision system drops off.
In most fault situations an auto-diagnostic fault
code is shown on the relay display. The fault
code cannot be reset. The fault code consists of
a red digit one (1) and a green code number
that indicates the fault type. The fault code
should be recorded and stated when service is
ordered.
The fault codes of the over-/undervoltage relay
module SPCU 3C14 are explained in the fol-
lowing table:
Fault code
Explanation
4
Faulty output relay path or missing output relay card
30
Faulty program memory (ROM)
50
Faulty working memory (RAM)
195
Too low a value in reference channel with multiplier 1
131
Too low a value in reference channel with multiplier 5
67
Too low a value in reference channel with multiplier 25
203
Too high a value in reference channel with multiplier 1
139
Too high a value in reference channel with multiplier 5
75
Too high a value in reference channel with multiplier 25
253
No interruptions from the A/D-converter
