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