Toyotomi TPN A128 IVP Service Manual page 31

While the zones of A,B,C... are corresponding to different compressor running frequency.
Note:
When T1-Ts keeps in the same temp. zone for 3 minutes, the compressor will run as the below rules:
A:Increase the frequency to 3 grade higher until to FREMAX.
B~E: Increase the frequency to 2 grade higher until to FREMAX.
F~G: Increase the frequency to 1 grade higher until to FREMAX.
H: Keep the current frequency.
I: Decrease the frequency to 1 grade lower until to F1.
J: Run at F1 for 1h.(if T1-Ts<-2℃, the compressor will stop)
Meanwhile, the compressor running frequency is limited by the current.
T1-Ts
3.5
A
3.0
B
2.5
C
2.0
D
1.5
E
1.0
F
0.5
G
0.0
H
-1.0
I
-1.5
J
T4
CoolT4Zone5I
50
49
CoolT4Zone4I
45
44
CoolT4Zone3I
41
40
CoolT4Zone2I
33
32
CoolT4Zone1I
31
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