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Heat Controller, Inc.
8.4.2.5 Evaporator low temperature T2 protection.
When T2<32°F/0°C, the compressor will stop and restart when T2>41°F/5°C.
When 32°F/0°C≤T2<39°F/4°C, the compressor frequency is limited and decreases to the lower level every
minute until stop the compressor stops.
When 39°F/4°C ≤T2≤45°F/7°C, the compressor will keep the current frequency.
When T2>45°F/7°C, the compressor frequency will not be limited.
8.4.3 Heating Mode
8.4.3.1 Compressor running rules:
The operation frequency of compressor after starting submits to following rule.
VMH SerieS
T4
°F
°C
93
(34)
91
(33)
82
(28)
81
(27)
77
(25)
75
(24)
72
(22)
70
(21)
66
(19)
64
(18)
63
(17)
61
(16)
59
(15)
57
(14)
54
(12)
52
(11)
43
(6)
41
(5)
25
24
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Troubleshooting
