Troubleshooting
Symptom Possible cause Solution
Room temperature too high When batteries are running
low, the device will automati-
cally set the room to a certain
temperature before the bat-
teries die.
Someone may have set the
room device too high.
Strong solar gains in low-
energy homes.
Replace the batteries (the
Danfoss Link
™ CC panel will
indicate if a device has run
out of battery power).
Reduce the room tempera-
ture setting range in the
room, or deactivate the local
setting option. Also refer to
section: Does the Danfoss
One® system have a tamper-
proof lock?
Solar screening / blinds.
Room temperature is too low
in all rooms
The heat source is providing
no or insucient heat.
The heat source itself is oper-
ating with an automatic tem-
perature reduction schedule.
Defective circulation pump.
Check if the heat source is
active.
Deactivate temperature re-
duction schedule on the heat
source if it conicts with the
desired operation.
Check the circulation pump.
If necessary, contact your
installer.
The room temperature is too
low in a single room (radiator
heating).
The thermostat has been set
too low.
There is air in the system.
Valve is “sticking”/defective.
Set the thermostat to the
desired temperature, at ½-
degree intervals, if possible.
If your radiator is making
hissing or bubbling noises, try
bleeding it for air, if possible,
topping o the system with
water (ask installer).
Replace the gland seal if
valve spindle movement is
restricted (Installer). Contact
your installer.
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