Operator Instructions
11
Pr
oblem
Possible Cause
Remedy
Air bubbles appear in discharge nozzle
Liquid r
eservoir is empty
Refill r
eservoir and prime unit
Too fast filling action
Fill and dispense mor
e slowly
Glass barr
el is not sealing against FEP 'O' ring
Unscr
ew the thr
eaded platform ring and make sur
e that the
FEP
'O' ring is pr
operly fitted into its r
ecess
Leaking piston
Clean
piston. If pr
oblem persists, r
eplace piston
Leaking discharge valve
Clean unit by flushing thr
ough - if pr
oblem persists,
replace platform base
Barr
el does not fill with liquid
Inlet tube not fitted corr
ectly
Connect inlet tube corr
ectly
Inlet valve stuck
Fr
ee inlet valve by inserting a thin r
od into the inlet apertur
e
Glass barr
el is not sealing against the FEP 'O' ring
Unscr
ew the thr
eaded ring and make sur
e that the
FEP 'O' ring is pr
operly fitted into its r
ecess
Dispensing not possible
Blocked dispense nozzle
Disassemble the dispense nozzle and flush thr
ough
with cleaning fluid
Discharge valve stuck
Clean unit by immersing platform in cleaning fluid
- if pr
oblem persists, r
eplace platform base
W
rong dispense volume
Instrument not calibrated
See page 6 ‘User Calibration’
Leaking valves
Clean platform base - if pr
oblem persists,r
eplace
Liquid appears between glass barr
el
Glass barr
el is not sealing against the
Unscr
ew the thr
eaded ring and make sur
e that the
and Polypr
opylene pr
otection sleeve
FEP 'O' ring
FEP 'O' ring is pr
operly fitted into its r
ecess
Damaged FEP
'O' ring
Replace FEP
'O' ring
Tr
oubleshooting
