Nibe AMS10 - Page 22

CONDITIONS FOR STOPPING DEFROSTING
If any of the following conditions are met, defrosting stops (does not apply to AMS 10-6).
• 8 minutes and 20 seconds after defrosting start.
• When the evaporation temperature Tho-R1 or -R2 (whichever is the lowest) is higher than 12 °C.
• The outdoor unit goes into protection mode.
Stop conditions AMS 10-6
If any of the following conditions are met, defrosting stops:
• 16 minutes and 35 seconds have passed after the 4-way valve has switched to defrosting.
• When the evaporation temperature Tho-R1 or -R2 (whichever is the lowest) is higher than 10 °C.
• The outdoor unit goes into protection mode.
Defrosting diagram AMS10-6
Compr. speed
FAN
4-way valve
ON
OFF
1rps / 10s
Only in defrost operation
10s
ON
Defrost timing chart (AMS10-6)
Defrost end
c
ondition fulfilled
5s
10s
ON
OFF
Upper limit 55rps
20rps (Tho-A ≥ 0°C)
12rps (Tho-A < 0°C)
90s 10s
100s
D
efrost start
Tho-A ≥ 0°C
Tho-A < 0°C
140s or 10s after Tho-R ≥-20°C
0rps
Fan speed 6
th
Fan speed 1
st
or 2
nd
Normal
control
Tho-R ≤ 5°C
EEV
5s
120s 60s
60s 60s
470 pulse
pulse 400
pulse 300
pulse 200
pulse 100
0 pulse
120sMax 16.5 min.
ExplanationShortening
Temperature sensor, outdoor airTho-A
Temperature sensor, hot gasTho-D
Temperature sensor, evaporationTho-R
NIBE AMS10Chapter 4 | Description of functions22