60 - EN
8. Malfunctions
In case of recurring malfunctions, please contact the manufacturer.
Make sure that the device, which wants to connect wirelessly (via RF or Wi-Fi) to the CM, is within 2 metres
of the CM.
function
error or malfunction
location
visualisation
action
Wi-Fi
if there are multiple users
trying to connect to the Wi-Fi
AP
web server
N/A
allow the last user to connect
to the Wi-Fi AP and delete all
other Wi-Fi AP connections
Wi-Fi connection error
LED
LED flashes quickly
N/A
Wi-Fi connected for too long
N/A
LED off
Wi-Fi module switches off
after 4 hours
Wi-Fi active for too long
N/A
LED off
Wi-Fi module switches off
after 4 hours
RF
cannot make RF connection
or link
web server
brief description of the error
and of the possible cause (e.g.
RF network not available)
restart the RF module
web server
multiple failed login attempts any UI (e.g. web
browser on
laptop or
smartphone)
a login error message, or a
check password message, or a
warning about the number of
allowed remaining login
attempts appears
after 3 unsuccessful login
attempts you cannot log in for
10 minutes; after that you can
log in again
data display of current
device not possible
web server
brief description of the error
and its possible cause (e.g.
ComfoNet connection failed,
no ComfoNet device detected)
N/A
data display of current
network devices not possible
web server
brief description of the error
and its possible cause (e.g.
Modbus connection failed, no
Modbus device detected)
N/A
exceeding WI-Fi connection
capacity; it is not possible to
display the website
any UI (e.g. web
browser on
laptop or
smartphone)
standard HTML error (e.g.
page loading failed)
refresh the page to check if
the connection is available
again
VM sensors
incorrect measurements of
the pressure sensor (e.g.
pressure sensor damaged or
twisted)
web server
brief description of the fault
and its possible cause (e.g.
pressure sensor possibly
damaged)
compare with the previous
measurement; discard
measurement if difference is
outside expectation; accept
measurement if within trend;
start self-test
no communication with the
pressure sensor
web server
brief description of the fault
and its possible cause (e.g.
pressure sensor possibly
damaged)
N/A
moving the stepper motor
does not result in the
expected air volume flow
web server and
error LED
web server: brief description of
the fault and of the possible
cause (e.g. defective stepper
motor, contamination in the
pipe in which the valve is
located, incorrect flow
measurements)
LED: the error LED is on
(critical error)
start a self-test
10001124369-0123-zw-zw-A4 ComfoVar Aero Installer_Service Zehnder-General_BOOK_2.indb 60
10001124369-0123-zw-zw-A4 ComfoVar Aero Installer_Service Zehnder-General_BOOK_2.indb 60
24-01-2023 11:11
24-01-2023 11:11