Midea SMK-60/CGN8, Руководство по обслуживанию

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M‐Thermal Split
20 201909
Midea M‐Thermal Split Ser
vice Manual
4.6 Outdoor Fan Control
The speed of the outdoor unit fan is adjusted in steps, as shown in Table 3‐4.1.
Table 3‐4.1: Component control during cooling operation
Fan speed index
Fan speed (rpm)
4kW 6kW 8kW 10kW
W1 300 300 300 300
W2 340 340 340 340
W3 400 400 400 400
W4 450 450 450 450
W5 520 520 520 520
W6 580 580 580 580
W7 630 630 630 630
W8 680 680 680 680
W9 730 730 730 730
5 Protection Control
5.1 High Pressure Protection Control
This control protects the refrigerant system from abnormally high pressure and protects the compressor from transient
spikes in pressure.
Figure 3‐5.1: High pressure protection control
Notes:
1. P
c
: Discharge pressure
When the discharge pressure rises above 4.2MPa the system displays P1 protection and the unit stops running. When the
discharge pressure drops below 3.2MPa, the compressor enters re‐start control.
5.2 Low Pressure Protection Control
This control protects the refrigerant system from abnormally low pressure and protects the compressor from transient
drops in pressure.
Figure 3‐5.2: Low pressure protection control
Notes:
1. P
e
: Suction pressure
P
c
> 4.2MPa P
c
< 3.2MPa
Normal operation
High pressure protection, error code P1 is displayed
P
e
< 0.14MPa
P
e
> 0.30MPa
Normal operation
Low pressure protection, error code P0 is displayed
When P0 protection occurs 3 times
in 60 minutes, the HP error is
displayed. When an HP error occurs,
a manual system restart is required
before the system can resume
operation.
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