Alarm indications
General
There are many monitoring functions integrated in
NIBE SPLIT ACVM 270 to alert you to any malfunctions,
the control computer transmits alarm signals that can be
read from the front panel display.
What happens when an alarm appears on my
system?
■
The background lighting in the display starts flashing
and the status lamp lights red.
■
Compressor alarms and outdoor sensor errors change
the operating mode to ”Anti freeze” and reduce the
supply temperature to the minimum permitted temper-
ature to notify you that something is wrong.
Different types of alarms
■
Alarms with automatic reset (do not need to be acknow-
ledged when the cause has disappeared).
■
Existing alarms that require corrective action by you or
the installer.
■
A complete list of alarms is on page 61.
Recommended actions
1.
Read off which alarm has occurred from the heat
pump's display.
2.
As a customer you can rectify certain alarms. See the
table below for relevant actions. If the alarm is not
rectified, or is not included in the table, contact your
installer.
Check/remedy before installers/service
technicians are called
Alarm descriptionAlarm text on the display
Check that the thermostats for the radiat-
ors/under-floor heating systems are not
closed (only during cooling operation).
Tripped low pressure pressostat.LP-LARM
Check that the thermostats for the radiat-
ors/under-floor systems are not closed.
Tripped high pressure pressostat.HP-LARM
If cooling is in progress: Check that the air
flow to AMS 10 is not obstructed.
Check that any circuit breakers to the out-
door unit are not off.
Outdoor unit not powered / Communica-
tion cut
OU power failure / OU Com. error
Check and replace any blown circuit and
main fuses.
Display not lit.
Check that the circuit breaker to the indoor
unit is not off.
Check that the switch (SF1) is in normal
position (1).
Acknowledging alarms
No harm in acknowledging an alarm. If the cause of the
alarm remains, the alarm recurs.
■
When an alarm has been triggered, it can be acknow-
ledged by switching ACVM 270 off and on using the
switch (SF1). Note that when the power is switched on
there is a 30 minute delay before the heat pump restarts.
Alternatively, the alarm can be acknowledged in menu
9.7 (service menu).
■
When the alarm cannot be reset using the switch (SF1),
the operating mode, "Add. heat only", can be activated
to return to a normal temperature level in the house.
This is most easily carried out by holding the ”Operating
mode” button pressed in for 7 seconds.
■
Deactivate the function by pressing the "Operating
mode" button for 7 seconds once again.
NOTE
Recurring alarms mean that there is a fault in the in-
stallation.
Contact your installer!
NIBE™ SPLIT ACVM 27018
For the Installer
Alarm indications
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