Error displays with TFT control panel
On the TFT control panel, errors are displayed by plain text error messages. The last three occurred errors are
registered with their date and time according to the event in the main menu Information/last messages. In addition to
this message, a yellow warning triangle blinks on the top right edge of the screen. The following clear text error
messages are displayed:
Error Message Possible cause Checks/Measures
Sensor disruption or temperature
sensor short circuit
Version LEFT T1
Check detector or replace sensor
Sensor disruption or temperature
sensor short circuit
Version LEFT T2
Check detector or replace sensor
Sensor disruption or temperature
sensor short circuit
Version LEFT T3
Check detector or replace sensor
Sensor 4 sensor error
Sensor disruption or temperature
sensor short circuit
Version LEFT T4
Check detector or replace sensor
Supply air temperature is too
low
minimal supply air temperature <
nominal value
Supply air temperature > nominal
value + 1 K
Outdoor temperature too low
Current outdoor air temperature <
nominal value; longer than 30 min
Outdoor air temperature> nominal
value; control after 1 h
Supply air fan reports no rotational
speed
Version RIGHT:
Exhaust air fan reports no rotational
Manual setting of a fan speed
Exhaust air fan reports no rotational
speed
Version RIGHT:
Supply air fan reports no rotational
Manual setting of a fan speed
Software versions of the components
not compatible
Replace software versions
Too many units connected. Too many components connected to
Remove excessive components
Missing BUS communication
Communication error
Missing BUS communication Check BUS communication
Communication error
Defroster
Missing BUS communication
Communication error
Heating register
Missing BUS communication
Communication error
GHE shutter
Missing BUS communication
Communication error
General
BUS components of the control
device are not recognized
Disconnect from mains, then restart
Missing BUS communication with the
control panel (GHE)
Table 39Overview error messages, displays and troubleshooting with TFT control panel