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Fault - Cause - Remedy
Fault
Instrument cannot be switched on
Instrument cannot be switched off
Measured value setting time too long
Signal sound, red alarm light and possibly
»F« displayed
4
The instrument does not change to the
mode-selection operating mode
64
Cause
Battery absolutely flat
Instrument not in measurement mode
Main alarm for concentration A2
Switch-off-inhibit –
operating mode » 25.2« activated
Dirty sensor filter
The instrument has responded to an
internal fault
Zero point has been offset.
Display in operating mode 20.0 less than
or equal to –10 % LEL
A wrong passcode is entered
Passcode forgotten
Remedy
Charge battery, pages 21 and 22.
Set measurement –
operating mode »
0.0«.
Leave danger area and acknowledge
alarm.
Instrument can only be switched off when
switch-off-inhibit is swiched off.
Replace sensor filter, page 71.
Carry out initialization, pages 57 and 58.
If fault cannot be rectified, have repair
carried out by trained service personnel.
Carry out initialization, pages 57
and 58.
Recalibrate instrument, pages 36 to 46.
Use the passcode from the instrument
protocol.
Call DrägerService.
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