Siemens Servo Screen 390, Service Manual, Page: 29 / 49

Servo Screen 390
E382 E394E 061 01 02 02 29
Siemens-Elema AB
4. Service procedures
4
Battery change-confirmation
The backup battery in the Servo Screen 390
must be replaced when the information
”Replace Servo Screen 390 battery” is
displayed in the Message window (every
three years). Replacement is described in
the section “Replacing the battery” in this
chapter.
Battery replacement must be confirmed to
remove the ”Replace Servo Screen 390
battery” message. This confirmation also
sets the time used for controlling the
apperance of the message. The message
will appear after startup:
– three years after the latest Battery change-
confirmation or
– if the battery has been disconnected.
Note – It is not recommended to re-connect
a used battery and perform the necessary
Battery change-confirmation. The fixed time
interval until next appearance of the
”Replace Servo Screen 390 battery” is
selected for a fully charged battery.
Confirm battery change as follows:
• Connect the Servo Screen 390 to a
ventilator.
• Start the ventilator and the Servo Screen
390.
• Check that the Time and Date settings
displayed in Servo Screen 390 are correct.
If necessary, adjust according to the
instructions in the Operating Manual.
• Enter the Service Menu, using the Service
Access Code as previously described.
• Turn the control knob until the B
ATTERY
C
HANGE
icon is marked.
• Press the control knob. The battery
replacement is now confirmed. The
message in the Message window will
disappear immediately, but the B
ATTERY
C
HANGE
icon will not disappear until another
menu is selected.