In most cases, the heat pump notes operational interfer-
ence (operational interference can lead to disturbance
in comfort) and indicates this with alarms and shows
action instructions in the display.
Info-menu
All the heat pump measurement values are gathered
under menu 3.1 in the heat pump menu system. Looking
through the values in this menu can often simplify find-
ing the source of the fault. See help menu or user
manual for more information about menu 3.1.
Manage alarm
info / action
reset alarm
aid mode
Low pressure alarm
alarm
In the event of an alarm, some kind of malfunction has
occurred, which is indicated by the status lamp changing
from green continuously to red continuously. In addition,
an alarm bell appears in the information window.
Alarm
In the event of an alarm with a red status lamp a malfunc-
tion has occurred that the heat pump cannot remedy
itself. In the display, by turning the control knob and
pressing the OK button, you can see the type of alarm it
is and reset it. You can also choose to set the heat pump
to aid mode.
info / action Here you can read what the alarm means
and receive tips on what you can do to correct the
problem that caused the alarm.
reset alarm In most cases it is enough to select ”reset
alarm” to correct the problem that caused the alarm. If
a green light illuminates after selecting "reset alarm" the
alarm has been remedied. If a red light is still visible and
a menu called ”alarm” is visible in the display, the prob-
lem that caused the alarm remains. If the alarm disap-
pears and then returns, see the section "Troubleshoot-
ing".
aid mode ”aid mode” is a type of emergency mode. This
means that the heat pump produces heat and/or hot
water despite there being some kind of problem. This
can mean that the heat pump's compressor is not run-
ning. In this case the immersion heater produces heat
and/or hot water.
NOTE
To select aid mode an alarm action must be se-
lected in the menu 5.1.4.
Caution
Selecting "aid mode” is not the same as correct-
ing the problem that caused the alarm. The
status lamp will therefore continue to be red.
Troubleshooting
If the operational interference is not shown in the display
the following tips can be used:
Basic actions
Start by checking the following possible fault sources:
■
The switch's (SF1) position.
■
Group and main fuses of the accommodation.
■
Earth-fault breaker.
■
The heat pump's miniature circuit breaker (FA1).
■
The heat pump's temperature limiter (FD1).
■
Correctly set load monitor (if installed).
Low hot water temperature or a lack of hot
water
■
Closed or choked filling valve (QM10) for the hot water
heater.
–
Open the valve.
■
Heat pump in incorrect operating mode.
–
Enter menu 4.2. If mode "auto" is selected, select a
higher value on "stop additional heat" in menu 4.9.2.
–
If mode "manual" is selected, select "addition".
■
Large hot water consumption.
–
Wait until the hot water has heated up. Temporarily
increased hot water capacity (temporary lux) can be
activated in menu 2.1.
■
Too low hot water setting.
–
Enter menu 2.2 and select a higher comfort mode.
Low room temperature
■
Closed thermostats in several rooms.
–
See the "Saving tips" section in the User manual for
more detailed information about how to best set
the thermostats.
■
Heat pump in incorrect operating mode.
–
Enter menu 4.2. If mode "auto" is selected, select a
higher value on "stop heating" in menu 4.9.2.
–
If mode "manual" is selected, select "heating". If this
is not enough, select "addition".
■
Too low set value on the automatic heating control.
–
Enter menu 1.1 "temperature" and adjust the offset
heating curve up. If the room temperature is only
low in cold weather the curve slope in menu 1.9.1
"heating curve" needs adjusting up.
■
"comfort mode" "luxury" selected in combination with
large hot water outlet.
–
Enter menu 2.2 and select "economy" or "normal".
NIBE F470Chapter 10 | Disturbances in comfort54
10 Disturbances in comfort
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