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Troubleshooting
Symptom
Low temperature or a lack
of hot water
Low or a lack of ventilation
Remote control does not
work
The compressor does not
start
Alarms
Alarms are shown in the display by the background
lighting flashing and text in the main menu shifting be-
tween status and current alarm.
The table below describes the alarms that can occur
during control.
Alarm no. Alarm
10
T1 OPEN
11
T1 SHORT
12
T2 OPEN
13
T2 SHORT
14
T3 OPEN
15
T3 SHORT
16
T4 OPEN
17
T4 SHORT
33
HIGH PRS
34
HIGH PRS
50
FROST
54
OVERHEAT
80
FILTER
Cause
Circuit or main MCB tripped.
Switch (8) set to 0.
Closed or throttled shut-off valve for the hot
water heater.
High hot water usage.
Tripped high pressure pressostat (49).
Filter (63) clogged.
Closed or too hard throttled exhaust air device.
Circuit or main MCB tripped.
Fan clogged.
Discharged batteries.
The remote control is outside range (red lamp
flashes during 8 seconds when button is pressed).
The remote control is not registered in the heat
pump.
Minimum time between compressor starts has
not been reached.
The compressor's internal motor protection has
tripped.
Alarm tripped.
Alarm description
Upper hot water sensor (87) is defective.
Upper hot water sensor (87) is short-circuited.
Evaporation sensor (86) is defective.
Evaporation sensor (86) is short-circuited.
Flow line sensor (89) is defective.
Flow line sensor (89) is short-circuited.
Lower hot water sensor (88) is defective.
Lower hot water sensor (88) is short-circuited.
High pressure pressostat has detected too high pressure in the cooling sec-
tion. The alarm automatically becomes inactive when the pressure drops back
to the permitted level.
High pressure pressostat has detected high pressure 3 times within one hour.
The alarm must be acknowledged manually.
Upper hot water sensor (87) has been below 1 ˚C. Automatically inactive
when the sensor exceeds 5 ˚C.
Upper hot water sensor (87) has been above 95 ˚C. Automatically inactive
when the sensor falls below 92 ˚C.
Replace or clean air filter. Indication occurs 90 days (default value) after ack-
nowledging the last filter alarm.
Action
Check and replace blown fuses.
Set the switch to 1.
Open shut-off valve.
Wait a few hours and check if the hot water
temperature rises. Possibly set the comfort level
higher.
Contact installers in the event of recurring cases.
Clean or replace the air filter.
Open exhaust air devices.
Check and replace blown fuses.
Clean fan.
Replace the batteries.
Move closer to the heat pump.
Contact installers or register the remote control
according to "Installation" – "General informa-
tion for the installer" – "Registering remote
control".
Wait 30 minutes and check if the compressor
starts.
No action usually required. In recurring cases,
the installer should be contacted.
See section "Alarms".
Acknowledging alarms
When an alarm has been triggered, it can be acknowl-
edged by switching the switch off and on for FIGHTER
120. The alarm then stops.
NOTE! Recurring alarms mean that there is a fault in the
installation. Contact your installer!
NIBE FIGHTER 120
For Home Owners
Dealing with malfunctions
Action
Contact installer.
Contact installer.
Contact installer.
Contact installer.
Contact installer.
Contact installer.
Contact installer.
Contact installer.
No action.
Contact installer.
Contact installer.
Contact installer.
Replace/clean air filter.
9
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