Duraflow
13
ALARMS
There are two types of audible alarms: a battery alarm and a flow rate alarm
AUDIBLE ALARMS
The audible alarm travels through the hose and into the headtop area. You can hear
the alarm in the headtop or, if you wear an open headtop, from the hose.
When you hear an audible alarm, you must evacuate the hazardous area immediately
and do not return until the problem is solved.
LOW BATTERY ALARM: LED AND SOUNDER BEHAVIOUR
Alarm Sounds
Sounder Behaviour
Repeat
Meaning
5 seconds on, 2 seconds off
3 times
Battery falls below 12 minutes
1 second on, 1 second off
Constant
Battery falls below 7 minutes
Battery LEDs
Symbol LED Colour and Behaviour
Meaning
1 green LED
>12 minutes capacity remaining
1 red LED
<12 minutes capacity remaining
1 red LED flashing every second
<7 minutes capacity remaining
FLOW RATE ALARM: LED AND SOUNDER BEHAVIOUR
The most common cause of a flow rate alarm is an obstruction in the hose or blocked
particle filters.
When the flow rate of the PAPR drops below 160 Lpm, and the on-board control
mechanism of the Duraflow PAPR cannot correct the problem, an alarm sounds, and
the
Warning
LED flashes.
When you hear the first alarm, evacuate the hazardous area and do not return until
the safety issue is resolved.
Symbol
LED and Alarm Behaviour
The
Warning
LED flashes every second until the issue is resolved.
An alarm sounds every second until the issue is resolved.
Alarm will continue until either:
• You switch off whole unit
• You resolve the airflow issue
