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·OR· Tao
·Tao
[Note] Frequency maintained within the 3 min after starting is as follows:
③
Restart of the compressor
1. In the control of the compressor, in order to prevent starting at dierential pressure, it must take some time to
balance the high and low pressure after stopping fully, the restarting will delay automatically, and the compressor
can restart after stopping for 3 to 5 minutes.
2. When the operating mode shifts from cooling (dehumidifying] to heating; the all compressors shall stop and delay
3~5 min to restart.
3. When powering on, a delay 3~5 min will occur to restart the compressor.
4. Before compressor restart; when the oil temperature cannot meet the start requirement, compressor will delay
starting until oil temperature can meet the minimum requirement.
④
Cycle start function of compressor
1. According to dierent loads of indoor unit, determine the number of compressors needing to start and outdoor
units needing to start.
2. If there is only 1 outdoor unit but 2 compressors; the priority of compressor 1 and 2 will shift every 4 hours.
3. If there are several outdoor units, the priority of these outdoor units shall be shifted every 8 hours. If the outdoor
unit with 2 compressors is operating, it shall shift the priority of compressor 1 and 2 every 4 hours.
4. Shift the priority of compressor and outdoor unit to meet shift interval in the following conditions.
1) When all of compressor and outdoor unit are ON or OFF at the same time, the priority can be shifted directly;
2) When all of outdoor unit and compressor operate in the process of oil return and deforesting, they can shift the
priority;
3) When outdoor unit and compressor with higher priority stops upon a failure alarm; the priority can be shifted
directly without evaluating the interval period.
5. Multi-connected unit of MX7 series without xed host and sub-unit can shift in turn according to the conditions.
⑤
Changes of the number of compressors (take the multiple connection of 3 double compressor of outdoor unit as
an example):
Compressor shifts its operating number with a dierent operating frequency according to the following pictures.
※
No.1 in the following picture represents the compressor with the highest priority, and outdoor unit 1 represents
the outdoor unit with the highest priority, and so on.
1. At rst, when operating frequency of one compressor of the outdoor unit 1 is less than 75% of the highest
frequency, only No. 1 compressor works.
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