HCE80(R) / HCC80(R) Mounting and operation
23
Errors and elimination
Problem Cause/solution
Power LED does not 
light up when the 
power is switched on.
Mains voltage not connected. 
 f Check voltage of 
electrical outlet.
 f Check fuse at underfloor 
heating controller.
LEDs 1...8 of the 
zones do not 
illuminate green 
continuously during 
commissioning.
The room name cannot 
be assigned. 
 f Check the antenna connection.
 f Reassign the zone, 
if applicable.
LEDs 1...8 of the 
zones do not 
illuminate red 
continuously during 
commissioning. 
The room setpoint generator/
sensor cannot be assigned.
 f Check whether batteries in 
the room setpoint generator/
sensor are inserted properly.
 f Check the radio connection.
 f Check the antenna connection.
Rooms are not 
heated/cooled. 
 f Check heating and 
inlet temperature.
 f Check the switch for setting 
normally open/normally 
closed (see Page 10).
 f Check the fuse of the 
underfloor heating controller. 
If fuse is defective: 
 f Check the thermal actuators 
for a short circuit.
 f Change the fuse.
Problem Cause/solution
The   LED lights 
up red after 
commissioning.
There is a fault in one of the 
temperature zones (see Page 15).
 f Check the radio connection.
 f Check the antenna connection.
 f Check whether zone is 
assigned correctly.
 f Check the batteries of 
the assigned devices.
The room temperature 
is not controlled 
correctly.
 f Check whether a room 
setpoint generator/sensor 
is assigned to the room.
The   LED 
flashes rapidly.
No device installed.
 f Install the devices again.
The   LED flashes.
No antenna connected 
or antenna defective.
 f Check the antenna connection.
 f If applicable, replace the 
antenna by a new one.
The red LED of the 
learned zone flashes 
after binding.
The evohome controller has 
not yet sent a valid sensor 
value of the DTS92 to the 
underfloor heating controller.
The red LED extinguishes 
after approx. 3 minutes.