116
③
Fan control
1. When the cooling high pressure is lower than 1.9MPa, the outdoor fan will stop.
2. When the cooling high pressure is lower than 2.2MPa, the rotating speed of outdoor fan is fuzzy controlled
based on targeting 2.2MPa of high pressure.
3. When the cooling high pressure is more than 2.2MPa, the outdoor fan will operate at the highest rotating
speed.
4. When the heating high pressure is more than Pd+0.3MPa, the rotating speed of outdoor fan is fuzzy
controlled based on targeting Pd+0.3MPa of high pressure.
5. When the heating high pressure is lower than Pd+0.3MPa, the outdoor fan will operate at the highest rotating
speed.
6. When the heating high pressure is more than Pd+0.5MPa, the outdoor fan will stop.
15.4 Pressure protection control
①
Protection control for high pressure
1. When the high pressure reaches 3.7MPa, the frequency of compressor will be limited and controlled, and the
SV1 start control will be conducted at the same time, making the high pressure not exceed 3.7MPa.
2. When the high pressure reaches 4.0MPa or more, the failure of high pressure switch disconnection is
alarmed, and the unit will stop operating.
②
Protection control for low pressure
1
、
When the low pressure reaches 1.05MPa or more, make sure the pressure will not exceed 1.05MPa by
controlling the LEVa1 and 2 of all outdoor units when heating; make sure the pressure will not exceed 1.05MPa
by controlling the LEV of all indoor units when cooling.
2
、
When the low pressure is lower than 0.2MPa, the SV1will be started to increase the low pressure;
3
、
Alarm to shut down if the followings are detected within 5min: cooling: Ps< 0.10Mpa; heating: Ps< 0.05Mpa;
defrosting and oil return: Ps<0.03Mpa after the compressor operates.
15.5 Overheating protection control
①
When the temperature at the top of compressor rises, the corresponding SV31 and 2 is started to conduct the
liquid bypass cooling.
(Refer to Figure 1) Td high temperature side (
≦
130
℃
) control / SV31 and 2 control
②
When the temperature at the bottom of compressor rises to 110
℃
, the output frequency of compressor is
limited and controlled.
(Refer to Figure 2) Td1 and 2 high temperature side (
≦
120
℃
) control / INV compressor control
Содержание AWAU-YDV1010-H13
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