Nibe AMS 10-16 - Hot water alarm; Supply alarm

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
HBS 16 is broken. There must be 22 volt direct
current (DC) in 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 hot gas sensor
(Tho-R1/R2) five times within 60 minutes or un-
der 60 minutes.
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) two times within 60 minutes or under
60 minutes.
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).S. fault Tho-RE37
- Sensor does not work (see "Temperature
sensor" section)
- Defective control board in AMS 10
NIBE™ SPLIT64
Miscellaneous
Alarm list