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MAINTENANCE INSTRUCTIONS
TROUBLESHOOTING
The table below contains troubleshooting and
fault repair instructions.
FAULT
Message on the user interface:
Extract fan stopped
Message on the user interface:
Supply fan stopped
Message on the user interface:
Cell has frozen
Message on the user interface:
Temperature sensor 1/2/3/4/5
Message on the user interface:
External sensor
Message on the user interface:
Post-heater
Message on the user interface:
Bus fault
The ventilation unit is not
working; the control panel is
not working.
The ventilation unit is working,
but the control panel is not
working.
CAUSE
The extract air fan has stopped.
The supply air fan has stopped.
The heat recovery cell has
become excessively cold.
The temperature sensor indicated
on the user interface is damaged.
The external temperature sensor is
damaged.
The post-heater does not heat
Problems with the data transfer
bus.
Power input to the unit is lost
Either the control panel 24 VDC
power is lost, or the control panel
is damaged.
41
DV50 DV80
(Integral CO
NOTE
Error messages are displayed
on the control panel and in the
ADROIT Home and ADROIT Cloud
services.
MEASURES
Make sure that the fan is not running. The fan cabling
and operation must be checked, and if necessary the
fan must be replaced. Contact the service centre.
Make sure that the fan is not running. The fan cabling
and operation must be checked, and if necessary the
fan must be replaced. Contact the service centre.
Conduct a manual defrost through the control panel
(Service menu > Cell defrost). Try to discover why the
heat recovery cell is frozen.
The sensor installation must be checked, and if
required the sensor must be replaced. Contact the
service centre.
The sensor installation must be checked, and if
required the sensor must be replaced. Contact the
service centre.
The heater installation must be checked, and if
required the heater must be replaced. Contact the
service centre.
Make sure that the Modbus bus is connected correctly,
and that the devices connected to it are properly
functioning.
Check:
• Fuse in the fusebox
• Fuse in the unit
Check the cables from the unit to the control panel.
Contact the service centre if necessary.
© Airflow • We reserve the right to make changes without prior notice
Sensor)
2
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