Midea M-thermal Mono Series - Startup Control

M thermal Mono
202004 17
Part 3 - Control
3 Startup Control
3.1 Compressor Startup Delay Control
In initial startup control and in restart control (except in oil return operation and defrosting operation), compressor startup
is delayed such that a minimum of the set re-start delay time has elapsed since the compressor stopped, in order to
prevent frequent compressor on/off and to equalize the pressure within the refrigerant system. The compressor re-start
delays for cooling and heating modes are set on the user interface. Refer to the M thermal Mono Engineering Data Book
Part 3, 7.5 “COOL MODE SETTING Menu” and Part 3, 7.6 “HEAT MODE SETTING Menu”.
3.2 Compressor Startup Program
In initial startup control and in re-start control, compressor startup is controlled according to outdoor ambient
temperature. Compressor startup follows one of two startup programs until the target rotation speed is reached. Refer to
Figures 3-3.1, 3-3.2, 3-3.3 and 3-3.4.
Figure 3-3.1: 4-6kW to 12-16kW Compressor startup program
1,2
when ambient temperature is above 3°C
10
20
30
40
50
60
70
80
90
38Hz
40S
32Hz
60S
42Hz
40S
56Hz
40S
66Hz
40S
70Hz
120S
82Hz
120S
目标频率
时间
Hz
Figure 3-3.2: 8-10kW Compressor startup program
1,2
when ambient temperature is above 11°C
42Hz
90S
36Hz
60S
42Hz
40S
56Hz
40S
66Hz
40S
70Hz
40S
82Hz
120S
目标频率
时间
Hz
TIME
TARGET FREQUENCY
TIME
TARGET FREQUENCY
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