25
Heat Controller
VMH 30, 36 SerieS
Service Manual
23
8.4.3 Heating Mode
8.4.3.1 Compressor running rules:
The operation frequency of compressor after starting submits to following rule.
After AC starts up, the compressor will run at the Fmax frequency for 7 minutes according to outdoor
ambient temp. During the 7 minutes, frequency limitation is available.
7 minutes later, compressor running frequency will be controlled as below:
+5.0
+4.5
+3.5
+3.0
+2.5
+2.0
+1.5
+1.0
H
G
H
F
E
D
C
B
A
+0.5
While
Temp. zone
A
B
C
D
E
F
G
H
Frequency
F10
F9
F8
F7
F5
F3
F1
F0
ΔT
=32°F(0°C) as default.
T4
C°
(34)
(33)
(28)
(27)
(25)
(24)
(22)
(21)
(19)
(18)
(17)
(16)
(15)
(14)
(12)
(11)
(6)
(5)
T4
F°
93°
91.5°
82.3°
80.6°
77°
75°
71.5°
70°
66°
64.5°
62.5°
61°
59°
57°
53.5°
52°
43°
41°
C°
(+5.0)
(+4.5)
(+3.5)
(+3.0)
(+2.5)
(+2.0)
(+1.5)
(+1.0)
(+0.5)
F°
41°
40°
38°
37°
37°
36°
35°
34°
33°
