20
LEFT
HAND
VERSION
RIGHT
HAND
VERSION
5.1 Malfunctions
5.7.1 Malfunction indicator
Warning in display
Description
A1
NTC sensor T1 defect (outside air temperature)
A2
NTC sensor T2 defect (supply air temperature)
A3
NTC sensor T3 defect (exhaust air temperature)
A4
NTC sensor T4 defect (exhaust air temperature)
A5
Bypass motor malfunction
E1
Exhaust fan not rotating (M1)
E2
Supply fan not rotating (M2)
E3
No 230V AC current to fan
Prevent water from entering the electrical connections.
Take care that, when fitting the exchanger and leakage tray, the condensation drain pipe is fitted to the
same side as the condensation drain connection.
Check the unit’s condensation drain once every 2 years
Reassemble all these components in reverse order and conduct a self-test according to menu P81.
