P32-EN – Subject to technical changes 04.11
20
Troubleshooting
Problem
Cause
Remedy
Room temperature too cold
Controller is switched off
Switch the main switch at the control console to
on, if necessary.
Switch the heating emergency switch to on,
if necessary.
Check the main fuse for the heating system.
Malfunction message on the auto-
matic firing system of the external
burner
Resume external burner operation.
If the burner repeatedly switches off, inform the
company responsible for the installation of the
boiler.
Radiator is not warm enough
Open the radiator valve some more
**
.
The room temperature cannot be set
using the radiator valve
Increase the target room temperature in the time
program of the heating circuit
*
(see
page 35
).
If necessary, change the slope
*
,
see
table on page 21.
Notify the company responsible for installation
if you cannot resolve the problem.
Room temperature too warm
Radiator too hot
Close the radiator valve some more
**
.
All rooms are overheated or the refer-
ence room is too warm**
Decrease the target room temperature in the time
program of the heating circuit
*
(see
page 35
).
If necessary, change the slope
*
,
see
table on page 21.
If necessary, switch the mixer to “AUTO”
(
page 28
).
Notify the company responsible for installation
if you cannot resolve the problem.
The reference room is always
too warm or too cold**
The heat curve is set incorrectly
Another heating curve must be set,
see
table on page 21
.
Hot water temperature is too
low even though the storage
tank is warm
T.WW.NOM is set too low
Set T.WW.NOM (
page 13
).
Air in the storage tank
Bleed the storage tank (
notify installer
)
*
Each time after a setting has been changed on the system controller, you should wait a while (one or more days) before
making any further changes. As a result of physical conditions, changes to the parameters in the control system can
often cause fluctuations of the control area (room temperature), which, depending on the existing conditions, can reach
a constant value relatively quickly.
**
First of all, open all the heating valves fully. If all rooms are too warm or too cold, change the heating curve accordingly
on the system controller. If one or more rooms have the correct temperature and the other rooms are too warm, the
heating valves must be closed some more in these rooms. There must always be at least one room in which the
heating valves are fully opened (reference room). This is usually the room that is most difficult to heat.
6.1 Problems with the room temperature
