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MAINTENANCE
TROUBLESHOOTING
Flashing LED
Problem
Correction
1
NTC sensor of the supply air from the cell is faulty
Check the sensor and the wires, replace as required
2
NTC sensor of the extract air is faulty
Check the sensor and the wires, replace as required
3
NTC sensor of the extract air is faulty
Check the sensor and the wires, replace as required
4
NTC sensor of the exhaust air is faulty
Check the sensor and the wires, replace as required
5
NTC sensor of the outdoor air is faulty
Check the sensor and the wires, replace as required
6
The supply air fan has stopped.
Check the wiring of the fan, replace the fan as required
7
The extract air fan has stopped.
Check the wiring of the fan, replace the fan as required
8
EEPROM is faulty
Replace the circuit board
BEFORE BEGINNING
MAINTENANCE WORK
The safety switch (S) automatically turns off the power
when the door of the Vallox TSK Multi 50/80 MC ventilation
unit is opened. Always disconnect the power plug before
starting the Vallox TSK Multi 50/80 MC ventilation unit
maintenance.
FILTERS
When the maintenance reminder becomes activated,
check the cleanliness of the filters and replace them if
required. The Vallox ventilation unit has three air filters:
• Coarse filter for supply air (A) filters insects, heavy
pollen and other relatively large foreign objects out of
the outdoor air.
• Fine filter for supply air (B) filters microscopic pollen
and dust particles out of the supply air.
• Coarse filter for extract air (C) filters the extract air
and keeps the heat recovery cell clean.
Using original Vallox filters ensures the best operation
of the ventilation unit and the best filtering results. The
filter replacement interval depends on the ambient dust
concentration. It is recommended that the filters be
replaced every spring and autumn, or at the very least
once a year.
S
R model in the figures.
In the L model, the parts are mirrored
TROUBLESHOOTING TABLE
If the ventilation unit is affected by any of the errors listed in the table, the unit will report the error through the error
relay, signal light, and circuit board LEDS. The number of flashes indicates the nature of the error.
The error relay can be connected to remote monitoring.
NOTE! When remote monitoring is used, the signal light of the control panel cannot be turned on.
A
B
C