Changing The Control Boards; Messages, Visualization Of Errors And Error Treatment - Zehnder Rittling ComfoAir 70 Operating Manual And Assembly

3.3.3 Changing the Control Boards

The device is to be separated from the network before changing the board! An ESD-Strap is
to be created!
The board is found in the lower left part of the casing and can be easily reached by extracting the device
from the wall sleeves. After all connected cables were separated from the board, the board can be easily
extracted from the provided guiding.
The control boards can now be changed. Then connect all the cables again to the boards (network
connection in the end) and set the device again properly in the wall sleeves.

3.4 Messages, Visualization of Errors and Error Treatment

The device control is equipped with an internal system for error detection. The visualization of messages and
the error forecast is done through a red LED.
Error Signalization through LED
If there is an error in the system then this is displayed through a red LED under the error symbol.
LED-Signalization
Red LED blinks
White LED blinks
If an error occurs then note the type plate serial number (refer to type plate on the EPP-base body) and
please contact the responsible installer.
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Definition
Ventilator is defective or is blocked
Flap-Servomotor is blocked
Temperature sensor is defective
Check/change filter