Nibe S2125, Installer Manual, Page: 39 / 64

LARGE AMOUNT OF WATER BELOW S2125
• The accessory KVR 11 is required.
• If KVR 11 is installed, check that the water drainage flows
freely.
ACTIVE DEFROSTING IS TERMINATED
There are several possible reasons for an active defrosting
to end:
• If the temperature of the evaporator sensor has reached
its stop value (normal stop).
• When defrosting has gone on for longer than 15 minutes.
This may be due to too little energy in the heat source,
too strong a wind effect on the evaporator and/or that
the sensor on the evaporator is not correct and therefore
displays too low a temperature (at cold outdoor air).
• When the temperature on the return line sensor, BT3, falls
below 10 °C.
• If the temperature of the evaporator (BP8) falls below its
lowest permitted value. After failing to defrost ten times,
S2125 must be checked. This is indicated by an alarm.
39 Chapter 9 | Disturbances in comfort NIBE S2125