Climate Control Zoning System II installation and operation manual | Chapter 9 – Troubleshooting l 31
Chapter 9
Troubleshooting
The table below shows problems and alarms that can occur and describes solutions. Note that common issues may be due to
incorrectly installed loops or mixed up thermostats. In the case of mixed up thermostats in a system, use the room check function.
General troubleshooting
Problem Indication Probable cause Solutions
Fluctuating floor temperature Floor temperature is changing
abnormally between hot and cold in
heating mode.
Supply water temperature is
too high.
Check the boiler or pump.
Room temperature does not
match setpoint on the thermostat,
and actuators shut on/off on a
fixed interval.
Heating fall back function
is activated due to lost
communication with thermostat.
Check the connection of the room
thermostat.
Check the batteries in the room
thermostat.
Room temperature does not match
setpoint on thermostat.
The thermostat is placed in
direct sunlight or close to other
heat sources.
Check placement of the thermostat
according to installation instructions
and change location if needed.
The thermostat is placed in the
wrong room.
Check the placement of the
thermostats and change rooms
if needed.
The room is too cold Press – or + buttons to display the
temperature setpoint on the thermostat
Temperature setpoint is displayed
on the interface, in the room
information menu.
The thermostat setting is too low. Change the temperature setpoint.
The temperature displayed on
the thermostat changes after the
thermostat is moved.
The thermostat may be influenced
by an external heat source.
Change the location of the thermostat.
See installation report and
controller/channel numbering
on the thermostat label.
The thermostats of individual
rooms are incorrectly registered
Place the thermostat in the correct
room or change the thermostat
registration in the controller.
White indicator cannot be seen in the
window of an actuator.
An actuator does not open Replace the actuator
Contact the installer.
Setpoint temperature displayed in the
room information menu is lower than
the temperature set on the thermostat.
Incorrect minimum/maximum
limitation
Change the minimum/maximum
limitation in the interface.
The room is too warm
(or too cold in cooling mode)
Corresponding loop is warm even
after a long period without a heat call.
An actuator is not closing. Check that the actuator is
correctly installed.
Replace the actuator.
Contact the installer.
The floor is cold The room temperature is okay, but
the floor is cold.
No heat demand from the
underfloor heating system.
The room is heated by another
heat source.
No communication Communication error
Software versions incompatible
Registration is lost. Contact the installer.
Table 9-1: General troubleshooting
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