No test
cycle
start at the test
chamber closing
Sensor disconnected: sensor light
of
f
n Check the sensor connection to the -
test chamber and the
board
High helium background signal
Ambient
air helium
contamination
(background OK when
leak
detector
placed in another
room
or
environment,
free of
helium
contamination)
Internal
LDS
plastic tube disconnected
(background
decreases
very
slowly
when sniffer probe tip is blocked
with
a
finger)
Helium signal unstable
Ambient
source of
helium
contamination
50
Inconsistent
Helium signal Fine signal
adjustment required
51
Temperature too low/ high
Ambient temperature
sensor
52
Pump failure
Overheating
n Clean ambient
air
n Repair
LDS
probe tube (tightness
of
connectors) or change
LDS
probe
n Check possible
sources
of
helium
emission in the
surroundings
Eliminate or isolate
it
n Make an external
calibration
in
sniffing mode
n Make sure the leak detector is
used
within
ambient
temperature
tolerance
n Check the connections : unplug
and
plug the cables on the P0326
board
and the
pump
n If the pump isn’
t
locked at
starting,
the orange led on the P0326
lights
on after the simultaneous
lighting
of
the 3 leds during 3-4 seconds.
Recondition the pump or replace
it.
-
G 400
-
C
303
A 800
-
E
740/E
747
53
Pump speed P0326 switch is in
running
in n -
No noise from the rotary vane
pump
Abnormal noise from the rotary
vane pump
The exhaust pressure of the
pump
is not correct (lower or equal to 5
mbar )
The exhaust valve has not
opened
Leaks inside the leak
detector
Greasing of the pump ball bearings
to
be
performed
Rotary vane pump power supply
not
connected
Oil
temperature
lower than 10°C
n Check the
pump
n Check the gross leak valve
n Check the tightness of
the
canalizations, valves, pumps
and
cell (alcohol test or use of
another
detector)
n Regrease the pump ball
bearings
n Connect the rotary vane
pump
power supply
connector
n Heat the pump body
to
approximately
18°C
E
740
-
E
740
-
-
5/6
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