Nibe SPLIT ACVM270 - Page 33

Resets alarmTriggers alarmAlarm text on the
display
Alarm
no.
- Open-circuit or short-circuit on sensor inputSensor fault, supply, system 1 (BT2).Sensor fault VBF136
- Sensor does not work (see "Temperature
sensor" section)
- The alarm activates output “High priority
alarm” and must be reset manually.
- Open-circuit or short-circuit on sensor inputSensor fault, supply, system 2.Sensor fault VBF237
- Sensor does not work (see "Temperature
sensor" section)
- The alarm activates output “High priority
alarm” and must be reset manually.
- When condenser supply is greater than 14
°C during cooling.
When condenser supply (BT12) is less than 5
°C.
Low condenser out70
- When defrosting has ended. If the defrost-
ing caused the alarm (condenser supply
during defrosting is approx. 10 °C).
- The alarm activates output “Low priority
alarm” and is reset automatically.
- When condenser out is lower than 51 °C.When condenser supply is greater than 60
C and more than 120 seconds have passed
since shifting to the climate system.
High KF71
- The alarm activates output “Low priority
alarm” and is reset automatically.
- When the low pressure is greater than 0.83
MPa (8.3 bar) and condenser out is greater
than 14 degrees.
When the low pressure is less than 0.65 MPa
(6.5 bar) in cooling mode.
Anti freeze HX72
- The alarm activates output “Low priority
alarm” and is reset automatically.
- When the outdoor temperature rises above
1 °C.
When the outdoor temperature drops below
0 °C and the operating mode does not permit
heating.
Freeze prot73
- The alarm activates output “Low priority
alarm” and is reset automatically.
- When the current output decreases.Too high current output from the house.Current limit75
- The alarm activates output “Low priority
alarm” and is reset automatically.
- When the fault has been corrected.Failed communication to one or more boards.Com. alarm76
- The alarm activates output “Low priority
alarm” and is reset automatically.
- When defrost has ended.When the temperature in the water heater
is too low (low pressure is less than 0.5 MPa,
5.0 bar) during defrost.
Defrosting interrupted77
- The alarm activates output “Low priority
alarm” and is reset automatically.
- When defrost has ended.Exceeded limit value if the difference in water
temperature is too great during tank defrost-
ing.
Protection low flow
HWX
78
- The alarm activates output “Low priority
alarm” and is reset automatically.
33Chapter 5 | TroubleshootingNIBE SPLIT ACVM270