Nibe ACVM 270 User Manual

May be due toDescriptionAlarm text on the dis-
play
Alarm
no.
- Low flow in heating operationToo high temperature out from the condenser.High KF6
- Too high set temperaturesOccurs if alarm 71 occurs 3 times within an hour.
- Low flow during defrostAnti-freeze of heat exchanger.Anti freeze HX7
- Abnormally low temperature in the climate
system
Occurs if alarm 72 occurs 3 times within an hour.
- Low flow during defrostOccurs if the alarm 77 occurs 10 times in succes-
sion.
Defrosting interrupted14
- Abnormally low temperature in the climate
system
- Lack of refrigerant or leak
- Indoor unit and outdoor unit not compatible
with each other.
Indoor unit and outdoor unit do not communic-
ate with each other.
OU not compatible15
- Low flow during defrostOccurs if the alarm 78 occurs 10 times in succes-
sion.
Defrosting interrupted16
- Open-circuit or short-circuit on sensor inputSensor fault, high pressure (BP4).S. fault HP31
- Sensor does not work
- Open-circuit or short-circuit on sensor inputSensor fault, cond out (BT12).Sensor fault KF32
- Sensor does not work (see "Temperature
sensor" section)
- Open-circuit or short-circuit on sensor inputSensor fault, liquid line (BT15).S. fault Liquid line33
- Sensor does not work (see "Temperature
sensor" section)
AMS 10 alarm
The following alarms block AMS 10. Addition runs at min permitted supply temperature.
May be due toDescriptionAlarm text on the dis-
play
Alarm
no.
- Any isolator switches for AMS 10 offCommunication between the outdoor unit and
ACVM 270 is broken. There must be 22 volt
direct current (DC) at the switch CNW2 on the
control board (PWB1).
OU Com. errorE5
- Incorrect cable routing
- Sensor does not work (see "Temperature
sensor" section)
Temperature deviation on the heat exchanger
sensor (Tho-R1/R2) five times within 60 minutes
or for 60 minutes continuously.
High HX tempE35
- Insufficient air circulation or blocked heat ex-
changer
- Defective control board in AMS 10
- Too much refrigerant
- Sensor does not work (see "Temperature
sensor" section)
Temperature deviation on the hot gas sensor
(Tho-D) twice within 60 minutes or for 60
minutes continuously.
Permanent HotgasE36
- Insufficient air circulation or blocked heat ex-
changer
- If the fault persists during cooling, there may
be an insufficient amount of refrigerant.
- Defective control board in AMS 10
- Open-circuit or short-circuit on sensor inputSensor fault, heat exchanger in AMS 10 (Tho-
R).
Sensor fault Tho-RE37
- Sensor does not work (see "Temperature
sensor" section)
- Defective control board in AMS 10
NIBE™ SPLIT ACVM 27062
Miscellaneous
Alarm list

Nibe ACVM 270 Specifications

General

Brand	Nibe
Model	ACVM 270
Category	Air Conditioner
Language	English