May be due toActionCauseAlarm text on the
display
Alarm no.
Load monitor has prevented com-
pressor running at desired fre-
quency (F2040-12 additional heat:
and been below 85Hz) for at least
an hour (corresponding)
NoneLoad monitor
has caused the
compressor not
to run at the de-
sired frequency
The compressor's
phase has been over-
loaded
274
Load monitor has prevented com-
pressor running at desired fre-
quency (F2040-12 additional heat:
and been below 85Hz) for longer
than 5% of the total operating
time for the compressor. This first
detects the total number of operat-
ing hours by which the compressor
exceeds 1000h.
NoneLoad monitor
has caused the
compressor not
to run at the de-
sired frequency
The compressor's
phase has been over-
loaded for a long time
275
Temporary communication faultAccessory is
blocked
3 communica-
tion errors in
succession have
occurred on the
accessory card.
Com. error Acc. –EQ1282
Sensor EQ1-BT25 not connected,
defective.
CoolingDM cal-
culated with
EQ1-BT25 set to
0.
Resets automat-
ically when the
sensor has
worked continu-
ously for 60 s.
Sensor fault EQ1-BT25.323
Uncertain sensor accuracyChange from
auto to manual
pump speed
Delta BT3-BT12
greater than
|2K| after calibra-
tion
Slave EB101: Delta
BT2-BT3>|2K| during
calibration. Resets to
manual circulation
pump speed
354
Uncertain sensor accuracyChange from
auto to manual
pump speed
Delta BT3-BT2
greater than
|2K| after calibra-
tion
Slave EB101: Delta
BT3-BT63>|2K| during
calibration. Resets to
manual circulation
pump speed
355
Status AUX-inNoneExternal alarmalarm from external
input
995
Status AUX-inNoneSignal via AUX
input
Additional heat extern-
al blocked
996
Status AUX-inNoneThe compressor
is externally
blocked
The compressor is ex-
ternally blocked
997
The display/product has restartedThe dis-
play/product
has restarted
Display has re-
started
Starts998
NIBE™ VVM 320Chapter 6 | Troubleshooting48
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