11. Troubleshooting
Trouble
Possible causes
Action to be taken
Piston is difficult
to move
Formation of crystals
Clean instrument
(see chapter 8)
Reagent is not
aspirated
Sticking filling valve
Clean intake valve;
replace if necessary
(see chapter 9.1)
Cylinder does
not fill
Discharge valve damaged Clean discharge valve;
replace if necessary
(see chapter 9.2)
Intake-/dischar-
ge tube not
firmly con-
nected
Tubes damaged
Replace intake-/
discharge tube
Air is aspirated
Intake valve not firmly
connected
Tighten intake valve;
replace if necessary
(see chapter 9.1)
Intake tube not firmly
connected or damaged
Push intake tube on
firmly; replace if neces-
sary
Reagent with high vapor
pressure has been drawn
in too quickly
Aspirate reagent more
slowly
Dispensed volu-
me is too low
Intake valve leaks
Clean intake valve;
replace if necessary
(see chapter 9.1)
Intake tube not firmly
connected or damaged
Push intake tube on
firmly; replace if neces-
sary
If these measures do not help, return instrument for repair
(see chap. 13).
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