Leica Biosystems ST4020 - Manual (Page 42)

42 Instructions for Use V1.1, RevB – 10/2012
• Keypad does not respond to
key presses • The keypad or the control
board is faulty. • Inform Technical Service.
Possible cause Issue Corrective action
• Water does not flow. • Water hose is not
connected.
• Tap is not open.
• The valve in the instrument
is faulty (does not open) or
the control board is faulty.
• Adjust the flow rate for the
rinsing water at the tap as
described in Chap. 5.4.
• The drain hose must not be
kinked.
• Check the drain hose for
objects that might block it.
• Place the drain hose so that
water does not have to rise
above the level of the drain
fitting.
• Water overflows at the rin-
se stations. • Tap is open too far.
• The drain hose is clogged.
• The drain hose is routed
incorrectly, gradient
insufficient.
7. Troubleshooting
• Connect the water hose to
the stainer and the tap.
• Turn on the tap.
• Inform Technical Service.