Human HumaStar 300, Service Manual

Page: 191 / 405

lIquID level sensor (P/n:17970/31)
173
12.2 trouble Shooting guide
This section lists a series of problems and how to solve them. To solve some of
the problems use the Diagnostic Program “ HuMaStaR 300 toolS “.
defect Causes and Remedies
the probe descends all the
way to the bottom, but does
not reveal the level of the
liquid, or sometimes does not
reveal the Reagent level.
- Make sure that the connection between the
board EB0124.xx and the Probe support is not
broken.
- Make sure that the Probe is correctly fixed.
- Check the GND connection of flat cable
WC0101.02
- Clean the Probe both inside and outside with
alcohol and inside with a stainless steel wire.
- Make sure that the syringe ppiston does NOT
leak and is isolated from the diluter support.
- Make sure there is no foam inside the rea-
gent bottle or sample cup.
- Make sure that the reagent bottle or the sam-
ple cup is TOO full.
- Wash solution has too much foam and beco-
mes conductive.
- Replace flat cable WC 0101.02
- Replace board 17970/31
probe enters jerkily into the
liquid.
- Prepare fresh Wash solution using fresh dist.
Water.
- Check the GND connection of the cable
WC0101.02
- Replace flat cable WC 0101.02
- Replace board 17970/31
level Sensor stops above the
liquid – reagent or sample
and does not go down.
- Make sure there is a plastic isolator that se-
parates the Probe from the mixer motor cam
- Replace the cable WC 0101.02
- Clean the decoder disk, use a soft brush.
- Replace board
17970/31
- Replace the CPU slave board 17970/8 Rea-
gents or Sample System