In most cases, the heat pump F750 notes operational
interference (operational interference can lead to dis-
turbance 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 source of the fault.
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 21).
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:
■
That the heat pump is running or that the supply
cable to SAM 40 is connected.
■
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
■
The heat pump has temporarily prioritised supply air
ventilation to prevent too low temperatures in the
supply air coil.
Low room temperature
■
Air in the heating medium system.
■
Vent SAM 40 using vent valve (QM20).
■
Incorrect value set in supply air automatic control
system.
■
Enter menu 5.3.9 (ext sup air md) and adjust the
setting for the supply air temperature.
High room temperature
■
Incorrect value set in supply air automatic control
system.
■
Enter menu 5.3.9 (ext sup air md) and adjust the
setting for the supply air temperature.
Low or a lack of ventilation
■
Filter (HQ12) blocked.
■
Clean or replace the filter.
■
The ventilation is not adjusted.
■
Order/implement ventilation adjustment.
■
Supply air device closed, blocked or throttled down
too much.
■
Check and clean the supply air device.
High or distracting ventilation
■
Filter (HQ12) blocked.
■
Clean or replace the filter.
■
The ventilation is not adjusted.
■
Order/implement ventilation adjustment.
Low supply air temperature
■
Air in the heating medium system.
21Chapter 7 | Disturbances in comfortSAM 40
7 Disturbances in comfort
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