Nibe S2125 - Page 44

May be due toDescription existing alarmAlarm text on the displayAlarms
S-series
Alarms
VVM/SMO
(S2125)
Disruption in supply voltage.The power output from the inverter
has been too high 3 times within 2
hours or continuously for 1 hour.
High power load, com-
pressor
337455 (138)
Poor heating medium flow.
Defective compressor.
Fault in pressure sensor
BP8, BP9.
The pressure difference between
BP9 and BP8 has been too low at
compressor start 3 times within 30
minutes.
Failed start, no pressure
diff.
353501 (184)
The compressor does not
compress the refrigerant
sufficiently.
Compressor breakdown.
The inverter’s safety function
reduces the speed outside
of the compressor’s working
range.
Compressor speed below lowest
permitted speed.
Compressor speed too
low
354503 (186)
Clogged particle filter.The flow is low. Check particle filter
and pump.
Low defrosting flow418523
Defective circulation pump
(charge pump).
Pressure drop in the heating
system is too large.
The control board has been
replaced with a control board
for F2120.
The heat pump has the wrong con-
trol board.
Incorrect PCB in heat
pump. Change to a new
PCB suitable for S2125.
437589 (216)
NIBE S2125Chapter 8 | Disturbances in comfort44