Midea HB-A60/CGN8-B - Normal Operation Control

M thermal Split
202004 21
Part 3
-
Control
Figure 3-3.6: MHA-V12(14,16)W/D2(R)N8-B compressor startup program
1
when ambient temperature is at or below 3°C
38rps
Target rotation speed
Compressor rotation speed (rps)
Time (s)
0
24rps
56rps
66rps
70rps
82rps
40s
90s
40s
40s
240s
240s
42rps
60s
34rps
90s
Notes:
1. Once the first, 40-second stage of the program is complete, the program proceeds to the subsequent stages in a step-by-
step fashion and exits when the
target rotation speed has been reached.
3.3 Startup Control for Heating and Domestic Hot Water Operation
Table 3-3.1: Component control during startup in heating and domestic hot water modes
Component
Wiring diagram
label
4-16kW Control functions and states
Inverter compressor COMP
Compressor startup program selected according
to
ambient temperature
1
DC fan motor FAN Fan run at maximum speed
2
Electronic expansion valve EXV
Position (steps) from 0 (fully closed) to 480 (fully open),
controlled according to
outdoor ambient temperature,
discharge temperature, suction superheat,
Four-way valve 4-WAY On
Notes:
1. Refer to Part 3, 3.2 Compressor Startup Program .
2. Refer to Table 3-4.3 in Part 3, 4.6 Outdoor Fan Control .
3.4 Startup Control for Cooling Operation
Table 3-3.2: Component control during startup in cooling mode
Component
Wiring diagram
label
4-16kW Control functions and states
Inverter compressor COMP
Compressor startup program selected according
to
ambient temperature
1
DC fan motor FAN Fan run at maximum speed
2
Electronic expansion valve EXV
Position (steps) from 0 (fully closed)
to 480 (fully open),
controlled according to
outdoor ambient temperature,
discharge temperature, suction superheat
Four-way valve 4-WAY Off
Notes:
1. Refer to Part 3, 3.2 Compressor Startup Program .
2. Refer to Table 3-4.3 in Part 3, 4.6 Outdoor Fan Control .
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