JUMO 14597 safetyM STB/STW Ex - Safety Temperature Limiter and Safety Temperature Monitor Operating Manual - Manual (Page 136)

13 What to do, if ...
2013-04-01
130
... alarm relay output
is not closed between
terminals 14 and 15 al-
though the OK LED is lit
green (in valid range). - The integrated fuse cut-out is
defective,
caused by an excessive relay current.
h
Measure terminal 5 and 7 of the relay when
the LED K1 is lit green using a continuity
test device.
h
The device must be returned to JUMO for
repair.
v
Chapter 2.4 "Service addresses"
... the display is dark,
only the LEDs are lit - Display shut-down after time-out was acti-
vated.
h
Press any key
or switch off time-out.
v
Chapter 8.6.8 "Time-out operation"
Description Cause Remedy