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Service Manual VMH SERIES Heat Controller, Inc.
21
8.4.2 Cooling Mode
8.4.2.1 Compressor running rules:
The operating frequency of compressor after starting submits to following rule.
If users switch on A/C by remote controller, the compressor will run at the Fmax frequency for 7 minutes
according to outdoor ambient temp. During the 7 minutes, frequency limitation is active.
7 minutes later, the compressor running frequency will be controlled as below:
While
Temp . zone
A
B
C
D
E
F
G
Frequency
F8
F8
F7
F6
F5
F3
F1
T4
°F °C
113 (45)
109 (43)
104 (40)
100 (38)
86 (30)
82 (28)
72 (22)
68 (20)
T1-Ts
°F °C
38 (3.5)
37 (3.0)
37 (2.5)
36 (2.0)
40 (1.5)
34 (1.0)
33 (0.5)
29 (-0.5)
30 (-1.0)