Nibe F2025, Installation And Maintenance Instructions Manual, Page: 51 / 56

High flow temperature (T2). Indicated as 14 in
channel S1. Cause:
Check the charge flow and the particle filter
which may be partially clogged. Action:
High return temperature (T3). Indicated as 04 in
channel S1. Cause:
Check the charge flow and note the com-
pressor’s limitations at low outdoor air temper-
atures. Action:
Unsuccessful defrosting. Indicated as 15 in
channel S1. Cause:
Check the charge flow. Action:
Short operations times Indicated as 16 in channel
S1. Cause:
Check the connection difference for the thermo-
stat. Check the start temperature hot water
(menu 1.1) in any SMO 10. Check the charge
flow and the particle filter which may be partially
clogged. Action:
Hot gas temperature exceeds 120 °C. Indicated
as 17 in channel S1. Cause:
Contact installer. Action:
Incorrect direction of rotation. Indicated as 18
in channel S1. Cause:
When starting for the first time or after work in
the distribution board see “Commissioning and
adjusting” – "Start-up and inspection". Action:
Fan stopped. Cause:
Ensure that the air flow is not blocked. If the
fault remains contact the installation engineer. Action:
The alarm is acknowledged by the voltage to the heat
pump being interrupted and then restarted.
Draining, heat medium side
In the event of prolonged power failures it is recommended
that the part of the heating system located outdoors is
drained. (See the section Pipe connections)
NOTE
As F2025 can be connected to a large number of ex-
ternal units, these should also be checked.
If the operating disturbance cannot be rectified by means of the above, an installation engineer should be called.
49 F2025
Miscellaneous
Dealing with malfunctions