7
Troubleshooting
Problem
Discharge valve opens without apparent
reason
Discharge valve don't close
Discharge valve don't open
8
Spare Parts
For Spare Parts visit homecomfort.resideo.com/europe
9
Accessories
For Accessories visit homecomfort.resideo.com/europe
GB
Cause
Pressure strokes in water supply system Install a pressure reducing valve
Fluctuating inlet pressure
Inlet check valve and/or discharge valves
are dirty
Leaky inlet check valve
Deposits on valve seat
Damaged 'o'ring
Leaky discharge valve
Blocked pressure control pipe
6
Remedy
upstream the backflow preventer
Install a pressure reducing valve
upstream the backflow preventer
Remove check valve or discharge valve
and clean it
Replace check valve
Remove discharge valve, clean or
replace it
Remove discharge valve and replace
'o'ring
Remove discharge valve, clean or
replace it
Remove control pipe and clean it
MU1H-1242GE23 R0320