Nibe F2120-12, Installer Manual

Page: 36 / 68

Troubleshooting
NOTE
Work behind covers secured by screws may
only be carried out by, or under the supervision
of, a qualified installation engineer.
NOTE
As F2120 can be connected to a large number
of external units, these should also be checked.
NOTE
In the event of action to rectify malfunctions
that require work within screwed hatches the
incoming electricity must isolated at the safety
switch.
NOTE
The alarm is acknowledged on the indoor
module/control module (VVM / SMO) or by
the voltage to the heat pump being interrup-
ted and then restarted.
The following tips can be used to rectify comfort dis-
ruption:
Basic actions
Start by checking the following possible fault sources:
■
That the heat pump is running or that the supply
cable to F2120 is connected.
■
Group and main fuses of the accommodation.
■
The property's earth circuit breaker.
■
The heat pump's miniature circuit breaker (FC1).
■
Heat pump's earth-fault breaker.
■
F2120 automatic protection (FB1). (Only if KVR 10
is installed.)
Low hot water temperature or a lack of hot
water
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.
■
Incorrect settings indoor module or control module.
–
See the manual for the indoor module or control
module.
■
Clogged particle filter.
–
Check whether alarm high condenser out (162) is
in the alarm log. 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.
■
External switch for changing the room heating activ-
ated.
–
Check any external switches.
■
Incorrect settings in indoor module or control mod-
ule.
–
See the manual for the indoor module / control
module (VVM / SMO).
■
Incorrectly adjusted flow across the heat pump.
–
Check whether alarm high condenser in (163) or
high condenser out (162) is in the alarm log. Follow
the instructions for adjusting charge flow.
High room temperature
■
External switch for changing the room heating activ-
ated.
–
Check any external switches.
■
Incorrect settings in indoor module or control mod-
ule.
–
See the manual for the indoor module or control
module.
F2120 not in operation
F2120 communicates all alarms to the indoor mod-
ule/control module (VVM / SMO).
■
Ensure that the F2120 is connected to the power
source.
■
Check the indoor module/control module (VVM /
SMO). See section "Disturbances in comfort" in the
Installer Manual for the indoor module/control
module (VVM / SMO).
F2120 does not communicate
■
Check that the addressing of F2120 is correct.
■
Check that the communication cable has been con-
nected.
NIBE™ F2120 Chapter 8 | Disturbances in comfort 36
8 Disturbances in comfort