GB
MU1H-1111GE23 R0220
7
8
Troubleshooting
8.1 F76CS/FN76CS
8.2 FK76CS/FKN76CS
9
Spare Parts
For Spare Parts visit homecomfort.resideo.com/europe
10 Accessories
For Accessories visit homecomfort.resideo.com/europe
Problem
Cause
Remedy
Too little or no water pressure
Shut-off valves upstream or downstream
from filter not fully open
Open the shut-off valves fully
Filter mesh dirty
Reverse rinsing
Not fitted in flow direction
Fit filter in flow direction
Problem
Cause
Remedy
Water is escaping from the spring bonnet Diaphragm in valve insert is faulty
Replace valve insert
Too little or no water pressure
Shut-off valves up- or downstream of the
pressure reducing valve are not fully
open
Open the shut-off valves fully
Pressure reducing valve is not set to the
desired outlet pressure
Set outlet pressure
Filter mesh dirty
Reverse rinsing
Not fitted in flow direction
Fit filter in flow direction (note direction of
arrow on housing)
The outlet pressure set does not remain
constant
Filter mesh dirty
Reverse rinsing
Valve insert, sealing ring or edge of
nozzle is contaminated or worn
Replace valve insert
Rising pressure on outlet (e.g. in boiler) Check check valve, safety group etc.
