Failures
Manifolds Manual 27
9. Failures
9.1 Troubleshooting
Failure Possible cause Solution
Underoorheatingisnot
heating up
There is no heat demand Create heat demand by
raising the temperature of
the room thermostat.
Thermostatic valves are
closed
Open the thermostatic valves
Pump is not running See “putting into operation”
Central heating supply is hot
buttheoorisnotheating
up.
Insufcientowtothe
manifold(primary)
1. Use the pipe with the right
diameter and length (see
connecting the manifold to
thecentralheatingsystem)
2. Check the temperature
of the supply pipe on the
side of the central heating.
This should indicate the
temperature mentioned in
Chapter 3 for the relevant
type.
Trappedairintheunderoor
heating system
Check if there is no air left in
the system and vent
Pump is not running See putting into operation
and the explanation on
pumps
Tempertature of the
oorheatingtoohigh.
Thermostatic control is too
high
Lower the temperature on
the thermostatic control
Thermostatic valves are not
set
Set thermostatic valves
(see putting into operation/
settingthemanifold).
Pump makes a noise Trapped air in the circuit Vent the pump.
NOTICE:
Pump must be vented.
Check appendices Wilo Para
HU 25/6