Alarm
In the event of an alarm the LED changes 1 colour from
green to red. When one or several alarms are active, this
is indicated according to the following table. If more
than one alarm is active, the one with the highest priority
is displayed.
Cause / ActionLED indication
The rotor is blocked. Wait or re-
lease the rotor shaft.
Red + yellow LED (LED
5)
Supply voltage too low. Check the
supply voltage.
Red + yellow LED (LED
4)
Electrical fault. Check the supply
voltage or replace the circulation
pump.
Red + yellow LED (LED
3)
Post-adjustment, venting
Air is initially released from the hot water and venting
may be necessary. If gurgling sounds can be heard from
the heat pump or climate system, the entire system re-
quires additional venting. See section "Venting the cli-
mate system" on page 32 for information about venting
the heat pump.
NIBE F470Chapter 6 | Commissioning and adjusting38
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