JUMO 701150 14597 safetyM STB/STW - Safety Temperature Limiter and Safety Temperature Monitor Operating Manual - Manual (Page 108)

12 What to do, if ... 2014-05-01 108
Description Cause Remedy
... relay output "Alarm"
between terminal 14 and
16 is not closed although
the LED OK is lit green (in
the OK range).
- The integrated fuse cut-out is defective,
caused by an excessive relay current.
h Measure terminal 14 and 16 of the relay
when the LED K1 is lit green using a conti-
nuity 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 timeout was activat-
ed
h Press any key
or switch off timeout.
v Chapter 7.6.8 "Time-out operation"