Nibe F1355 - Page 61

May be due to/checkHeat pump action.CauseAlarm text on the
display
Alarm
no.
• Insufficient circulation in
the heating medium cir-
cuit.
– Bleed heat pump and
climate system.
– Check that the particle
filter is not blocked.
– Open any radiator/un-
derfloor heating thermo-
stats.
• Mounting inverter.
Compressor blocked.The inverter has reached
max. working temperature
due to inadequate cooling
3 times within 2 hours or
continuously for 1 hour.
Safety temp. inv.
achieved
439
Main and group fuses and
their cable connections.
Compressor blocked.Max. current in has been
temporarily too high 3
times within 2 hours or
continuously for 1 hour.
Inverter alarm
type II
441
• Insufficient circulation in
the heating medium cir-
cuit.
– Bleed heat pump and
climate system.
– Check that the particle
filter is not blocked.
– Open any radiator/un-
derfloor heating thermo-
stats.
• Mounting inverter.
Compressor blocked.The inverter has temporarily
reached max. working
temperature due to inad-
equate cooling 3 times
within 2 hours or continu-
ously for 1 hour.
Safety temp. inv.
achieved
443
Main and group fuses and
their cable connections.
Compressor blocked.A temporary inverter fault
has occurred 3 times within
2 hours or continuously for
1 hour.
Inverter protec-
tion
445
• Perform a complete re-
start of the heat pump.
See page 55.
• Main and group fuses and
their cable connections.
• Compressor wiring for in-
verter.
Compressor blocked.One phase has been miss-
ing 3 times within 2 hours
or missing continuously for
1 hour.
Phase failure447
• Main and group fuses and
their cable connections.
• Compressor wiring.
• Compressor.
Compressor blocked.The compressor has run
temporarily at a lower
speed than the minimum
permitted 3 times within
2 hours or continuously for
1 hour.
Failed com-
pressor starts
449
• Main and group fuses and
their cable connections.
• Compressor wiring.
• Inverter.
• Compressor.
Compressor blocked.The output current to the
compressor has been tem-
porarily too high 3 times
within 2 hours or continu-
ously for 1 hour.
High current load,
compressor
453
61Chapter 5 | Disturbances in comfortNIBE F1355