F2040 alarm
Following alarm blocks outdoor unit. Addition runs at min permitted supply temperature.
May be due toDescriptionAlarm text on
the display
Alarm no. in-
door unit
- Open-circuit or short-circuit on sensor
input.
Sensor fault. Sensor for incoming cold
water in F2040 (BT3).
Sensor fault BT33
- Sensor does not work (see "Disturbances
in comfort" section)
- Defective control board AA23 in F2040.
- Open-circuit or short-circuit on sensor
input.
Sensor fault. Sensor for outgoing water in
F2040 (BT12).
Sensor fault
BT12
12
- Sensor does not work (see "Disturbances
in comfort" section)
- Defective control board AA23 in F2040.
- Open-circuit or short-circuit on sensor
input.
Sensor fault. Sensor fluid line in F2040
(BT15).
Sensor fault
BT15
15
- Sensor does not work (see "Disturbances
in comfort" section)
- Defective control board AA23 in F2040.
- Low flow in heating operation.Too high temperature out from the con-
denser.
High condenser
out.
162
- For high set temperatures.
Self resetting.
Temperature generated by another heat
source.
Too high temperature in to the condenser.
Self resetting.
High condenser
in.
163
Set when the heat pump runs the defrost-
ing procedure.
No alarm without an operating status.Defrosting in
progress.
183
- Insufficient air circulation or blocked heat
exchanger
The high pressure pressostat (63H1) de-
ployed 5 times within 60 minutes or under
60 minutes continuously.
HP alarm220
- Open circuit or short circuit on input for
high pressure pressostat (63H1)
- Defective high pressure pressostat
- Expansion valve not correctly connected
- Service valve closed
- Defective control board in F2040
- Low or no flow during heating operation
- Defective circulation pump
- Defective fuse, F(4A)
- Open circuit or short circuit on input for
low pressure transmitter
Too low value on the low pressure trans-
mitter 3 times within 60 minutes.
LP alarm221
- Defective low pressure transmitter
- Defective control board in F2040
- Open circuit or short circuit on input for
suction gas sensor (Tho-S)
- Defective suction gas sensor (Tho-S)
NIBE™ F2040Chapter 6 | Troubleshooting48
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