Chapter 9: Troubleshooting; General Troubleshooting - Uponor Climate Control Zoning System II Installation And Operation Manual

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