Ultrasonic Sonic Touch II User Manual page 18

If only one alarm is active, the issue may be corrected and cleared using the error
refresh button. If multiple alarms are active, they can be viewed form the alarms page.
Up/down arrows are used to navigate through the alarms and the alarms page
contains and additional error refresh button located center on the right side. Alarms
can only be cleared if the issue is corrected. Actual alarm codes will be examined in
further detail later in this document.
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