12-11
ALARMSUSER HANDBOOK
2) If a “ZERO FAULT”
flag and a flashing
spanner symbol
appear, alternating
with a gas value as
shown in Fig. 12.10,
leave instrument
on for 30 to 60
minutes then switch
instrument Off and
On again.
If fault remains,
return instrument to
an approved Service
/ Repair facility.
If a ‘FLOW FAULT’ flag
appears, alternating with
mode as shown in Fig. 12.11,
a ‘ow fault’ exists. The pump
symbol will be extinguished
(except in Confined Space
mode). The fault LED will
also be ON.
Check sample line, sample
lter or probe for blockage,
if applicable. Clear blockage
then restart the pump.
12.6.4 Sample / Flow Fault
alternating with
Fig. 12.10 Sensor Fault
alternating with
Fig. 12.11 Sample / Flow Fault