77NIBE F1330
Miscellaneous
Actions with operating disturbances
Oil return
After 180 minutes operation below -8 °C KBut without
stopping, the compressor stops for 5 minutes for the oil in
the compressor to run backwards. The alarm then resets
automatically.
Constant alarm
SensfaltWw-in
This text is shown when a fault on the incoming heating
medium sensor (VBRA or VBRB) has been registered.
This may be due to:
Q Defective sensor.
Q Broken sensor cable.
The alarm is reset once the fault has been rectified and the
unit has been restarted or the alarm has been acknowl-
edged in menu 5.4.11 (Reset alarm).
SensfaltBriou
This text is shown when a fault on the outgoing brine sen-
sor (KButA or KButB) has been registered.
This may be due to:
Q Defective sensor.
Q Broken sensor cable.
The alarm is reset once the fault has been rectified and the
unit has been restarted or the alarm has been acknowl-
edged in menu 5.4.11 (Reset alarm).
Sensfalt HG
This text is shown when a fault on the hot gas sensor (HGA
or HGB) has been registered.
This may be due to:
Q Defective sensor.
Q Broken sensor cable.
The alarm is reset once the fault has been rectified and the
unit has been restarted or the alarm has been acknowl-
edged in menu 5.4.11 (Reset alarm).
HP-Alarm
When this alarm is shown the high pressure pressostat has
tripped.
This may be due to:
Q No or too low flow on the heating medium side, check
VBP-A and VBP-B.
Q Too high stop temperature for hot water charging,
check menu 1.2.
Q Too high return temperature set in menu 5.4.1.
The alarm is reset once the fault has been rectified and the
unit has been restarted or the alarm has been acknowl-
edged in menu 5.4.11 (Reset alarm).
LP-alarm
When this alarm is shown the low pressure pressostat has
tripped.
This may be due to:
Q Bad circulation in collector system due to inferior vent-
ing/low pressure or ice (if ice has formed the brine
pump (35) will be warm).
Q Brine pump (35) malfunction
Q Iced evaporator due to too low antifreeze concentra-
tion.
Q Leakage in the brine circuit.
The alarm is reset once the fault has been rectified and the
unit has been restarted or the alarm has been acknowl-
edged in menu 5.4.11 (Reset alarm).
MS-alarm
Shown when the motor cut-out on compressor A/B or the
brine pump has tripped.
This may be due to:
Q Phase failure due to tripped fuse.
Q Motor cut-out set incorrectly.
Q Incorrect phase sequence.
Q Incorrectly connected brine pump.
The alarm is reset once the fault has been rectified and the
unit has been restarted or the alarm has been acknowl-
edged in menu 5.4.11 (Reset alarm).
Lev.sens.alarm
Shows that the level, pressure or flow in the collector
circuit is low. The brine pump stops.
This may be due to:
Q Leakage in the brine circuit.
The alarm is reset once the fault has been rectified and the
unit has been restarted or the alarm has been acknowl-
edged in menu 5.4.11 (Reset alarm).
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