Memmert Universal ovens U plus, Incubators I plus, Sterilisers S plus - Manual (Page 37)

D24026 | Date 10/2014 37
Malfunctions, warning and error messages
Description Cause Action See
Temperature alarm and
"TWB" are displayed
TEMP
TWB Set 190.0 °C
195
.4 °C
The electronic
temperature
limiter (TWB) per-
manently switched
off heating.
Deactivate the alarm by pressing
the confirmation key.
Increase the difference between
the monitoring and setpoint
temperature – by either increas-
ing the max value of the temper-
ature monitoring or decreasing
the setpoint temperature.
If the alarm continues: Contact
customer service
page
33
page 2
Temperature alarm and
"TB" are displayed
TEMP
TB
230
.4 °C
The mechanical
temperature lim-
iter (TB) perma-
nently switched
off heating.
Switch off the appliance and
leave to cool down. Contact
customer service and have the
error rectified (e.g. by replacing
the temperature sensor).
page 2
6.2 Malfunctions, operating problems and appliance errors
Error description Cause of error Rectifying errors See
Displays are dark External power supply
was interrupted
Check the
power supply
page
22
Miniature fuse, appliance
fuse or power module
faulty
Contact customer
service
page 2
Displays cannot be
activated
Appliance locked by user ID Unlock with user ID page
53
The appliance is in pro-
gramme, timer or remote
control mode (mode "Write"
or "Write + Alarm")
Wait until the end of
the programme or
timer mode or switch
off the remote control
Displays suddenly look
different
Appliance is in "wrong"
mode
Change to operating or
menu mode by pressing
the MENU key