enervent eWind, User Instructions, Page: 17 / 20

17
User instructions
EN
Alarm Description
Alarm
limit
Symptoms Possible reason Action Notes
AL4 Supply fan
failure.
No Supply air. Supply air fan has stopped. Repair or change the
supply fan.
The unit will
not start before
the alarm
condition has
been removed
and the alarm
acknowledged
by pressing
any button on
the operating
panel.
AL5 Extract fan
failure.
No Extract air.
Extract air fan has stopped.
Repair or change the
extract fan.
AL6 Extract air
cold.
+10 °C Supply air cold. Indoor temperature low. Rise the in temperature. The ventilation
unit enters the
malfunction
status, which
means that the
extract air fan
is at minimum
speed and the
supply air fan
has stopped.
The alarm is
automatically
acknowledged
after the fault
condition is
removed.
Extract air duct heat
insulation insufficient.
Check the insulation
of the ducts and add
insulation if needed.
Ventilation unit service
hatch is open.
Close the service hatch.
TE30 temperature sensor is
faulty.
Repair or change the
sensor.
AL7 Supply air
hot.
Fire hazard.
+55 °C Supply air hot. Fire hazard. Check for any heat
sources.
The unit will
not start before
the alarm
condition has
been removed
and the
ventilation unit
restarted.
Electrical after heater is
malfunctioning.
Repair or replace the
electrical after heater.
Water after heater valve
actuator is malfunctioning.
Repair or replace the
valve actuator.
TE10 temperature sensor is
faulty.
Repair or replace the
temperature sensor.
AL8 Electric after-
heater or
pre-heater
overheating.
Supply air hot. Electric pre- or after-heater
is not functioning:
• Overheating protector has
tripped.
• Supply air fan has stopped.
• Supply air filter is blocked.
• Outside air grating is
blocked.
• Controller card of heater is
broken.
• Heater is broken.
Find out the reason
for overheating and
acknowledge the error
message.
Find out reason / replace
the fan.
Replace the filter.
Clean the grating.
Remove possible
mosquito net.
Replace the controller
card.
Replace the heater.