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Creating innovative solutions for you and your business since 1995.
9. TROUBLESHOOTING
Reports on the display
Unit's behavior
Likely problem
SOLUTION
1 – Exchanger 1 over-
heated
unit is ventilating
Preheated electric exchanger or
damaged sensor
Check that the air is flowing freely through the unit, that the
electric exchanger cools down sufficiently, or that the safety
thermostat of the el. reheating isn't damaged.
3 – Overheated preheating
unit is ventilating
Preheated electric preheater or
damaged sensor
Check that the air is flowing freely through the unit, that the
electric exchanger cools down sufficiently, or that the safety
thermostat of the el. reheating isn't damaged.
4 – Supply fan error
Unit is not working
Overheated fan or defect on ther-
mal contact of inlet fan
Determine the cause of the overheating: defective bearing, short-
circuit...
5 – Exhaust fan error
Unit is not working
Overheated fan or defect on ther-
mal contact of inlet fan
Determine the cause of the overheating: defective bearing, short-
circuit...
6 – Inlet filter clogged
unit is ventilating
Check clogged filter
If the filter has been replaced or if it does not need to be re
-
placed, reset the filter clogging
7 – Exhaust filter clogged
unit is ventilating
Check clogged filter
If the filter has been replaced or if it does not need to be re
-
placed, reset the filter clogging
12 – CO2 sensor failure
unit is ventilating
Defective air quality sensor
Control the air quality sensor and its connection to the unit
16 – Inlet – External
temperature sensor failure
(T-EXT1)
unit is ventilating
Defective contact or sensor
Control the connection of the sensor and replace if needed
(professional service)
17 – Inlet – Failure of the
temperature sensor behind
the exchanger (T-EXT2)
unit is ventilating
Defective contact or sensor
Control the connection of the sensor and replace if needed
(professional service)
18 – Inlet – Temperature
sensor failure in the supply
canal (T-EXT3)
unit is ventilating
Defective contact or sensor
Control the connection of the sensor and replace if needed
(professional service)
21 – Exhaust – Tempera-
ture sensor failure in the
exhaust canal (T-INT1)
unit is ventilating
Defective contact or sensor
Control the connection of the sensor and replace if needed
(professional service)
22 – Exhaust – Failure of
the temperature sensor of
the exchanger's anti-freeze
protection (T-INT2)
unit is ventilating
Defective contact or sensor
Control the connection of the sensor and replace if needed
(professional service)
25 – Room temperature
sensor failure (T_Room)
unit is ventilating
Defective contact or sensor
Control the connection of the sensor and replace if needed
74 – Flow reduction, mini-
mum temperature in the
canal not reached
Limited operation of the unit
The minimum temperature in the
canal was not reached
The temperature of the inlet and exhaust air is too low. Risk of
undercooling of the building or condensation in the ventilation
ductwork Possible failure of temperature sensor T-EXT3
The unit error is indicated with a red exclamation mark in the middle of the control display.
Pressing the exclamation mark shows the information on the error, see table below.
Condensation fault
Unit is working
High level of condensate in the unit
Check if the sink is connected to the outlet of the condensate
tank, the condition of the connection, and whether the sink is full
of water.
Check the flow of the pipes and whether the position of the unit
allows runoff.
The unit ventilates insuf-
ficiently or is noisy
Unit is working
Clogged filter or ductwork.
Check the filters and whether the ductwork is not clogged
