Heat Controller VMH C Series Service Manual page 25

Heat Controller
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:
While
Temp. zone
Frequency
ΔT =32°F(0°C) as default.
VMH 30, 36 SerieS
T4
T4
F°
C°
93°
(34)
91.5°
(33)
82.3°
(28)
80.6°
(27)
77°
(25)
75°
(24)
71.5°
(22)
70°
(21)
66°
(19)
64.5°
(18)
62.5°
(17)
61°
(16)
59°
(15)
57°
(14)
53.5°
(12)
52°
(11)
43°
(6)
41°
(5)
F°
C°
+5.0
41°
(+5.0)
+4.5
40°
(+4.5)
+3.5
38°
(+3.5)
+3.0
37°
(+3.0)
+2.5
37°
(+2.5)
+2.0
36°
(+2.0)
35°
(+1.5)
+1.5
34°
(+1.0) +1.0
33°
(+0.5)
+0.5
A B C
F10 F9 F8
H
G
F
E
D
C
B
A
D E F
F7 F5 F3
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Service Manual
G H
F1 F0