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R
EN
22. Software reset (restore factory settings)
1.
Simultaneously press
and hold all four keys for
5 seconds, until all of the
icons are shown on the
display.
OK
2.
Next, the device's soft-
ware version will be dis-
played for a few seconds.
M
+
+
+
3.
all settings will be erased
and reset to the default
factory settings.
5 seconds
