Nibe F1355 - Page 60

May be due to/checkHeat pump action.CauseAlarm text on the
display
Alarm
no.
• Open-circuit or short-cir-
cuit on sensor input.
• Defective sensor
The sensor signal is re-
placed by EPXX-BT3-10K
during shunt control.
The input for the sensor re-
ceives unreasonably high
or low value for longer than
2 seconds.
Sensor fault
EPXX-BT2
336-
339
Defective communication
cables.
None.Communication with the
accessory board OPT has
been missing for
60 seconds.
Com. error PCA
Accessory
357
Check the gas boiler.None.Alarm from GBM (OPT).GBM alarm358
This alarm was generated
by the gas boiler
Defective communication
cables.
Accessory is blocked.Communication with Pool
2 has been missing for
15 seconds.
Perm. com. error
pool 2
372
Main and group fuses and
their cable connections.
Compressor blocked.A communication alarm has
occurred 3 times within
2 hours or been active con-
tinuously for 1 hour.
Communication
fault with inverter
421
Main and group fuses and
their cable connections.
Compressor blocked.An alarm on the inverter’s
external input has occurred
3 times within 2 hours or
been active continuously
for 1 hour.
Inverter alarm
type II
423
Main and group fuses and
their cable connections.
Compressor blocked.Failed synchronisation has
occurred 3 times within
2 hours or continuously for
1 hour.
Safety stop, in-
verter
427
• Perform a complete re-
start of the heat pump.
See page 55.
Main and group fuses and
their cable connections.
Compressor blocked.Failed synchronisation has
occurred 3 times within
2 hours or continuously for
1 hour.
Safety stop, in-
verter
429
Main and group fuses and
their cable connections.
Compressor blocked.Continuous over-voltage
has been registered by the
inverter for 1 hour.
Inverter alarm
type I
431
Main and group fuses and
their cable connections.
Compressor blocked.Continuous under-voltage
has been registered by the
inverter for 1 hour.
Inverter alarm
type I
433
Main and group fuses and
their cable connections.
Compressor blocked.A compressor phase to the
inverter has been missing
for 1 hour.
Inverter alarm
type I
435
Main and group fuses and
their cable connections.
Compressor blocked.Mains disturbance has oc-
curred 3 times within
2 hours or continuously for
1 hour.
Mains disturb-
ance
437
• Perform a complete re-
start of the heat pump.
See page 55.
NIBE F1355Chapter 5 | Disturbances in comfort60