In most cases, F1145 notes a malfunction (a malfunction
can lead to disruption in comfort) and indicates this with
alarms, and instructions for action, 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 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 many cases, it is sufficient to select “reset
alarm” for the product to revert to normal operation. If
a green light comes on after selecting “reset alarm”,
the alarm has been remedied. If the red light is still on,
and a menu called “alarm” is visible in the display, the
problem causing the alarm still remains.
aid mode “aid mode” is a type of emergency mode.
This means that the heat pump produces heat and/or
hot water even though there is some kind of problem.
This could mean that the heat pump’s compressor is
not running. In this case, the immersion heater produces
heat and/or hot water.
Caution
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 cor-
recting the problem that caused the alarm. The
status lamp will therefore continue to be red.
If the operational interference is not shown in the display
the following tips can be used:
BASIC ACTIONS
Start by checking the following items:
• The switch's (SF1) position.
• Group and main fuses of the accommodation.
• The property's earth circuit breaker.
• Miniature circuit breaker for F1145 (FC1).
• Correctly set load monitor (if current sensors installed).
LOW HOT WATER TEMPERATURE OR NO
HOT WATER
• Mixing valve (if there is one installed) set too low.
– Adjust the mixer valve.
• F1145 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.
65Chapter 10 | Disturbances in comfortNIBE F1145
10 Disturbances in comfort
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