Alcotest 7410 GLC User’s Manual
9
Error Messages And Maintenance
Although the Alcotest 7410 GLC is a
reliable instrument, there can be occasional
problems. Some of them will require
maintenance or repair. If so, the calibrator
will be responsible for co-ordinating service
of the device. The following table lists error
codes which may be encountered by the
Operator.
Problem Cause Remedy
Instrument switches off automatically ! Power supply unit discharged
! Instrument has been left ready for
more than 4 minutes
Charge power supply unit or replace
batteries (refer to Calibrator)
“On” light is not lit after switching on, or
is only faintly lit;
the display shows incomplete symbols
Power supply unit is completely flat, or
12-Volt connection defective
(if applicable)
Recharge power supply unit or replace
batteries. Replace 12 V. connection if
indicated. **
Ready light not lit after switching on and
4 minute interval
Instrument malfunction Refer to calibrator for possible return to
Dräger Service.
No continuous tone when blowing into
the instrument
Instrument not ready for measurement Wait until green Ready-light is lit.
E0 Subject not blowing hard or evenly
enough
Remind subject how to blow
E1 Sensor fault Switch device off and on. If E1 re-
appears, sensor must be replaced by
Dräger Service. Advise calibrator.
E5 Fault in sampling system Repeat measurement. If E5 re-appears,
advise calibrator. Call Dräger Service.
E6 Instrument malfunction Advise calibrator. Call Dräger Service.
** The power supply for the GLC can be rechargeable NiCd batteries or disposable C-size batteries. The
manufacturer's specifications indicate the NiCd pack can provide up to 300 tests between charges, while the
disposable alkaline batteries can produce 600 tests before replacement. An optional 12 V adaptor is also available
for in-vehicle use. Replacement NiCd battery packs are available from the manufacturer, and alkaline batteries can
be replaced locally.
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