Nibe F1245 Service Manual

Repairers actionHeat pump action.CauseAlarm text on
the display
Alarm
no.
See fault-tracing schedule
page 42.
Compressor blocked.The high pressure switch
has deployed 2 times within
150 minutes or has been
deployed for 300 minutes
continuously.
High pressure
alarm
50
See fault-tracing schedule
page 43.
Compressor blocked.Low pressure switch has
tripped. The alarm is
blocked for 1 minute at
each switch between oper-
ating modes.
Low pressure
alarm
51
See fault-tracing schedule
page 44.
Internal electrical addition is
blocked.
Temperature limiter has
tripped
Temperature
limiter
52
Fill up and seal off any leak-
age in the collector circuit
Compressor and brine pump
blocked.
Brine level switch/ pressure
switch has tripped.
Level monitor53
See fault-tracing schedule
page 45.
Compressor blocked.The motor protection
breaker has tripped.
Motor protec-
tion
54
Call a qualified refrigeration
technician.
Compressor blocked.The compressor has been
stopped 3 times in 240 min
because the hot gas has ex-
ceeded 135°C for 20 mins
or temporarily exceeded
150°°C.
Hot gas alarm55
Compressor blocked, relay activ-
ated.
Heat pump program and
serial number do not match
each other.
Incorrect serial
number
56
Compressor blocked, relay activ-
ated.
Heat pump program and
serial number do not match
each other.
Incorrect pro-
gram
57
Bad circulation in the brine
circuit.
- Check the brine pump.
- Check that the brine is
bled.
- Check the brine’s freezing
point.
Compressor blocked.The temperature of the
outgoing brine goes below
the set min-temperature
and the alarm is selected to
be permanent.
Low HTFout60
See fault-tracing schedule
page 45.
Calculated flow is set to min
flow.
Communication with the
input board has been miss-
ing for 60 seconds.
Perm. Com. error
input card
70
See fault-tracing schedule
page 46.
Compressor blocked.Communication with the
base board has been miss-
ing for 15 seconds.
Perm. Com. error
base card
71
See fault-tracing schedule
page 46.
Compressor blocked.Communication with the
soft-start board has been
missing for 15 seconds.
Perm. com. fault
soft-start card
72
29Chapter 6 | TroubleshootingF1245

Nibe F1245 Specifications

General

Refrigerant	R410A
Control System	NIBE SMO 40
Dimensions (HxWxD)	1800 x 600 x 620 mm
Energy Efficiency Class Heating 35°C	A++
Energy Efficiency Class Heating 55°C	A++
Heating Capacity	5-12 kW
COP Heating	4.5
Integrated Hot Water Tank	180 liters
Power Input Heating	1.0 - 3.0 kW