393870-2 Rev 0: 11.07.2018 BBV
We reserve the right to change technical data without notice.
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Page 31
Rotor fault
Efficiency below 20%
longer than 2 minutes on
mastercard version.023 or
lower
Rotor exchanger
will stop.
Change dampers or
drivebelt if broken.
Fan turns «
OFF
» and
then back to «
NORM
»
to reset
Efficiency below 20%
longer than 10 minutes on
mastercard version .024,
030 or 031.
Efficiency below 20%
longer than 10 hours on
mastercard version .033.
or highter
For more info about alarms and troubleshooting, visit our web site
Ensy.no/Service and maintenance/ Alarms on AHU units troubleshooting
If the fans continuing to run when you want to reset an alarm by setting the fans into
«
OFF
» mode then the reason for this is that the "
Weekly schedule
" is activated.
This activation means you do not can put fans in the "
OFF
"
position
.
What you have to do then is to enter the weekly schedule, scroll until you get to the present day and make
that day to be not active by putting a
X
over the active period. If period “1” is active then scroll down to “
1
”
and press
–
(minus) so that it is not active.
Then you can go back in the menu and set the fans in “
OFF
” position to reset the alarm.
Remember to go back into the weekly schedule and set the period “
1
” active again by pressing the
+
button.
Press button 4 to accept the changes. Then press button 1 two times to get to the start side again.
Rotor Fault alarm will not be activated :
1. When using the kitchen hood and signal wiring is connected to KV contact outside the unit.
2. If the difference between UTE (Fresh air temperature sensor) and EAT (Extract temperature
sensor) is less than +/- 5°C
(for the master card ver.030 or lower, the value +/- 3°C)
3. When the extract air fan stops. (Rotary exchanger will always stop when the supply air fan
stops.)
When troubleshooting.
1. On the master card there is a small yellow diode light. This should be in normal operation
flashing approximately once per second.
2. If this light stays on all the time without blinking then the card stalled. What you can try is to
unplug and plug in again and see if this helps. Whether there are still lit all the time then a
reprogramming the software on the master card is what is needed to be done. To reprogram
then you have to contact your service partner. Reprogram then to version 033 or
newer/highter if it is posted on Ensy.no.
3. If the light is blinking faster than once per second than do the same procedure here as above
in section. 2.
