NOTE
In the event of action to rectify malfunctions
that require work within screwed hatches, the
incoming supply electricity must isolated at the
safety switch by or under the supervision of a
qualified electrician.
Caution
Alarms are acknowledged on the indoor module
/ control module (VVM / SMO).
The following tips can be used to rectify comfort disrup-
tion:
Basic actions
Start by checking any alarm messages in the info menu
on the indoor module (VVM) / control module (SMO).
Follow the instructions on the display on the indoor
module (VVM) / control module (SMO).
F2120 not in operation
F2120 communicates all alarms to the indoor mod-
ule/control module (VVM / SMO).
■ Check LED status on the base board (AA2), see page
15.
■ Ensure that the F2120 is connected to the power
source and that compressor operation is required.
■ Check the indoor module/control module (VVM /
SMO). See section "Disturbances in comfort" in the In-
staller Manual for the indoor module/control module
(VVM / SMO).
F2120 does not communicate
■ Check LED status on the base board (AA2), see page
15.
■ Check that F2120 is correctly installed in the indoor
module (VVM) or the control module (SMO).
■ Check that the communication cable is correctly con-
nected and working.
Low hot water temperature or
a lack of hot water
NOTE
The hot water is always set on the indoor mod-
ule (VVM) or the control module (SMO).
This part of the fault-tracing chapter only applies if the
heat pump is docked to the hot water heater.
■ Large hot water consumption.
–
Wait until the hot water has heated up.
■ The hot water settings are adjusted on the display on
the indoor module / control module.
–
See the manual for the indoor module or control
module.
■ Clogged particle filter.
–
Check whether alarm "high condenser out" (162) is
an information message. Check and clean the
particle filter.
Low room temperature
■ Closed thermostats in several rooms.
–
Set the thermostats to max in as many rooms as
possible.
■ Incorrect settings in indoor module or control module.
–
See the manual for the indoor module / control
module (VVM / SMO).
■ Incorrect flow across the heat pump.
–
Check whether alarm "high condenser in" (163) or
"high condenser out" (162) are info messages. Follow
the instructions for adjusting charge flow.
High room temperature
■ Incorrect settings in indoor module or control module.
–
See the manual for the indoor module or control
module.
Ice build-up in the fan, grille
and/or fan cone on the outdoor
module
■ Activate "de-icing fan" (menu 5.11.1.1).
■ Check that the air flow across the evaporator is correct.
Large amount of water below
F2120
■ KVR 10 is required.
■ If KVR 10 is installed, check that the water drainage
flows freely.
21Chapter 5 | TroubleshootingF2120
5 Troubleshooting
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