In most cases, the heat pump notes operational inter-
ference (operational interference can lead to disturb-
ance 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 finding the fault source. See page 46 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 chan-
ging 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 mal-
function 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
problem that caused the alarm remains. If the alarm
disappears and then returns, see the troubleshooting
section (page 60).
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
running. In this case the immersion heater produces
heat and/or hot water.
NOTE
To select aid mode an alarm action must be
selected 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 dis-
play 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.
■
The property's earth circuit 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. Temporar-
ily 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".
■
"Holiday mode" activated in menu 4.7.
■
Enter menu 4.7 and select "Off".
NIBE™ F370Chapter 10 | Disturbances in comfort60
10 Disturbances in comfort
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