6
Maintenance
Battery display
LED – flashes when voltage is under 3.6V
CAUTION!
Use only cold, clear drinking water to clean the
surfaces.
6.1 Batteries
The batteries must be replaced after no more than
12 months
It is recommended to use high quality, long life (AA)
batteries.
7
Troubleshooting
Problem
LED flashes
No reverse rinsing
MU0H-1153GE23 R0823
GB
1.
2.
3.
4.
5.
6.2 Ball valve
Cause
Batteries too weak
Batteries too weak
Power supply not plugged in
Power supply unit defective
Ball valve in filter defective
7
Loosen fastening screws
Open housing cover
Insert batteries
Close housing cover
Tighten fastening screws
Check regularly that the drain ball valve can move
freely.
Remedy
Replace batteries
Replace batteries
Plug in power supply
Replace power supply unit
Replace ball valve