12.1 Troubleshooting after installation
Problem
Indication
Probable cause
Solutions
The controller does
not start
No LED indication on the controller when
thermostat setpoint is changed
The actuator never opens
There is no AC power in the controller
1. Check that the controller is connected
to AC power
2. Check the wiring
3. Check that there is 230 V AC power in
the wall socket
4. Restart the controller by
disconnecting and reconnecting the
power plug. The controller flashes
red/green at startup
There is 230 V AC power in the wall socket Faulty power cable
1. Replace the fuse, for the wall socket,
and/or power cable and plug
Poor radio
reception
Repeated radio alarms (LED flashes
rapidly)
The controller is installed inside a
metal cabinet, or too close to other
shielding objects
Building structure unfavourable for
radio transmission
Change the controller location. If the
problem persists, contact the installer
The thermostats is
faulty
The radio connection LED in the controller
continue flashing
The controller is not correctly
installed or positioned
Check the wiring
12.2 Digital thermostats T-166 and T-168 alarms/problems
An alarm is sent when more than 1 hours have elapsed since the controller received the last radio signal from the thermostat.
The table below shows problems that can occur in the digital thermostats T-166 and T-168.
Indication
Probable cause
Solutions
Battery icon is displayed
Thermostat battery power is running low
Replace the batteries
The display is off
The batteries are discharged or wrong type of
batteries is used
Replace the batteries
The batteries are installed upside down (reverse
polarity)
Install the batteries correctly
Radio transmission icon is displayed
but the signals are received only when
the thermostat is close to the antenna
Transmitter working with reduced signal
intensity
Force the thermostat to transmit by changing the
temperature setpoint
Replace thermostat
New installations in building shield radio signals
(for example, metal door safe)
Try to find a new position for the thermostat and/or the
antenna, or, if possible, move the shielding object
No radio transmission icon
is
displayed on thermostat screen when
–/+ buttons are pressed
The transmitter broken in the thermostat
Force the thermostat to transmit by changing the
temperature setpoint
Replace the thermostat
Relative humidity icon
is displayed
(T-168 only)
The relative humidity limit is reached
Lower the humidity level by increasing ventilation, increasing
the temperature setpoint, or shutting off cooling
The icon for floor temperature sensor
flashes
Faulty temperature sensor
Check the connection of the floor sensor
Disconnect the floor temperature sensor and check it with an
ohmmeter. The value must be arount 10 kohms
The icon for indoor temperature sensor
flashes
Faulty temperature sensor
Contact the installer or replace the thermostat
12.3 Analogue thermostat T-165 alarms/problems
An alarm is sent when more than 1 hour have elapsed since the controller received the last radio signal from the thermostat.
The table below lists problems that can occur in standard thermostat T-165.
Indication
Probable cause
Solutions
The LED on the thermostat flashes
twice
The thermostat battery power is running low
Replace the batteries
UK
CZ
DE
DK
EE
ES
FI
FR
HR
HU
IT
LT
LV
NL
NO
PL
PT
RO
RU
SE
SK
3 4
U P O N O R S M AT R I X S PA C E / S PA C E P L U S · I N S TA L L AT I O N A N D O P E R AT I O N M A N U A L
