Nibe SMO 20 - Advanced Troubleshooting; Compressor Start Problems

■
Control module 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.
■
Too low or no operating prioritisation of heat.
–
Enter menu 4.9.1 and increase the time for when heating is to be pri-
oritised.
■
"Holiday mode" activated in menu 4.7.
–
Enter menu 4.7 and select "Off".
■
External switch for changing the room heating activated.
–
Check any external switches.
■
Air in the climate system.
–
Vent the climate system.
■
Closed valves to the climate system.
–
Open the valves (contact your installer for assistance in finding them).
High room temperature
■
Too high set value on the automatic heating control.
–
Enter menu 1.1 (temperature) and reduce the offset heating curve. If
the room temperature is only high in cold weather the curve slope in
menu 1.9.1 "heating curve" needs adjusting down.
■
External switch for changing the room heating activated.
–
Check any external switches.
Low system pressure
■
Not enough water in the climate system.
–
Top up the water in the climate system.
The compressor does not start
■
There is no heating requirement.
–
The heat pump does not call on heating nor hot water.
■
Temperature conditions tripped.
–
Wait until the temperature condition has been reset.
65NIBE™ SMO 20Chapter 4 | Disturbances in comfort