Fluid leaks at the gap
- Recirculation valve loose
- Tighten recirculation valve with the wrench
between the valve
or damaged
or replace if necessary (see point 10)
block and the recir-
culation valve
Fluid leaks between
- Stopcock shaft loose
- Tighten nut on stopcock shaft
stopcock shaft and
valve block (only per-
ceptible when cover is
removed
Delivered volume
- Discharge tube loose or damaged - Mount original discharge tube correctly
incorrect
- Suction tube loose or damaged (see point 6.2).
- Suction/discharge/recirculation
- Tighten suction tube (see point 6.1).
valves loose or damaged
- Tighten valves with the wrench.
- Clean the device (see point 8.1).
No display
- Device switched off
- Briefly touch either one of the keys to switch
on the device
- 49 -