Heat Controller, Inc. | VMH Series | Service Manual |
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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.
T4 |
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°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) |
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25
