Nibe AMS10 - Fan Speed Control

Process 2
First start after the heat pump has been powerless.
Cooling operation:
The compressor starts with the speed in ”A rps”.
At outdoor temperatures above 35 °C, the start value
speed changes to “C rps”.
Heating operation:
The compressor starts with the speed in “A rps”.
At HM in (BT3) temperature above 48 °C, the start speed
is changed to “C rps”
5 minutes
and higher
Between
1 and 5
minutes
Between
0 and 1
minute
Time from
start
State
C rpsB rpsA rps
-3240Speed
AMS 10-6
Heating
mode
C rpsB minA rpsState
_1020Speed
AMS 10-8
Cooling
mode
301055Speed
AMS 10-
12/-16
___Speed
AMS 10-8
Heating
mode
30 *255Speed
TAMS 10-
12/-16
*The compressor speed is locked at A rps for B minutes
after start-up.
Process 3
Compressor starts in heating operation after having been
switched off for 2 hours or more.
The compressor starts with the speed in “A rps”.
At HM in (BT3) temperature above 48 °C, the start speed
is changed to “C rps”
B minA rpsState
340Speed AMS
10-6
Heating
mode
1540Speed AMS
10-8
1555Speed AMS
10-12/-16
*The compressor speed is locked at A rps for B minutes
after start-up.
Fan speed
The fan starts at the lowest speed. This does not apply
to AMS 10-6, which is regulated according to the com-
pressor’s speed.
The relationship between the evaporator’s temperature
and outdoor temperature limits the fan speed as follows.
COOLING MODE
Fan speed (rpm)AMS 10-6
MaxMin
850150
Min
fan
speed
(rpm)
Max fan speed (rpm)AMS 10-8
DCBATho-A
Tho-R
130710850850850a
190600710850850b
190400600710710c
190200400600600d
Tho-R
d
25
30
33
40
43
53
c
b
a
Tho-A
D
15
18
30
37
46
48
C
B
A
Fan speed (rpm)AMS 10-12/-16
MaxMin
870190
Cooling operation:
The fan speed is checked every 15 seconds so that the
heat exchanger temperature (Tho-R1, -R2), the highest
one, is within a certain range.
Fan speedSensor temperature Tho-R
Reduction by 10 rpmBelow 30 °C
NIBE AMS10Chapter 4 | Description of functions18