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[
II
Restrictions ]
- 25 -
HWE0913A
GB
(8) Demand control
1) General outline of control
Demand control is performed by using the external signal input to the 1-2 and 1-3 pins of CN3D on the outdoor units (OC and OS).
Between 2 and 8 steps of demand control is possible by setting Dip SW4-4 on the outdoor units (OC and OS).
*1 Available demand functions
P72-P144T(Y)JMU-A models (single-outdoor-unit system) : 2 and 4 steps shown in the rows 1 and 2 in the table above only.
P168-P288T(Y)SJMU-A models (two-outdoor-unit system OC+OS) : 2-8 steps shown in the rows 1, 2, 3, and 4 in the table
above only.
*2 External signal is input to CN3D on the outdoor unit whose SW4-4 is set to ON. When SW4-4 is set to OFF on all outdoor units,
the signal is input to the CN3D on the OC.
Outdoor units whose SW4-4 is set to ON are selectable in a single refrigerant system.
*3 If wrong sequence of steps are taken, the units may go into the Thermo-OFF (compressor stop) mode.
Ex) When switching from 100% to 50%
(Incorrect) 100%0%50% The units may go into the Thermo-OFF mode.
(Correct) 100%75%50%
*4 The percentage of the demand listed in the table above is an approximate value based on the compressor volume and does
not necessarily correspond with the actual capacity.
*5 Notes on using demand control in combination with the low-noise mode
To enable the low-noise mode, it is necessary to short-circuit 1-2 pin of CN3D on the outdoor unit whose SW4-4 is set to OFF.
When SW4-4 is set to ON on all outdoor units, the following operations cannot be performed.
Performing 4-step demand in combination with the low-noise operation in a single-outdoor-unit system.
Performing 8-step demand in combination with the low-noise operation in a two-outdoor-unit system.
2) Contact input and control content
2-step demand control
The same control as the Thermo-OFF is performed by closing 1-3 pin of CN3D.
4-step demand control (When SW4-4 is set to ON on an outdoor unit)
Demand capacity is shown below.
8-step demand control (When SW4-4 is set to ON on two outdoor units)
Demand capacity is shown below.
*1. The outdoor units whose SW4-4 is set to ON are designated as No. 1 and No. 2 in the order of address from small to large.
Ex) When outdoor units whose SW4-4 is set to ON are designated as OC and OS, OC=No. 1 and OS=No. 2.
No
Demand control switch
DipSW4-4
Input to CN3D*
2
OC
OS
1
2 steps (0-100%)
OFF
OFF
OC
2
4 steps (0-50-75-100%)
ON
OFF
OC
3
OFF
ON
OS
4
8 steps
(0-25-38-50-63-75-88-100%)
ON
ON
OC and OS
CN3D
1-3
Open
100%
Close
0%
CN3D
1-2P
1-3P
Open
Close
Open
100%
75%
Close
0%
50%
8-step demand
No.2 CN3D
1-2P
Open
Short-circuit
No.1 CN3D
1-2P
1-3P
Open
Short-circuit
Open
Short-circuit
Open
Open
100%
50%
88%
75%
Short-circuit
50%
0%
38%
25%
Short-circuit
Open
88%
38%
75%
63%
Short-circuit
75%
25%
63%
50%
Содержание PURY-P120TJMU-A
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Страница 36: ... II Restrictions 27 HWE0913A GB ...
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Страница 67: ... 58 II Restrictions GB HWE0913A ...
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Страница 94: ... III Outdoor Unit Components 85 HWE0913A GB 2 RELAY BOARD RELAY 4 board 3 RELAY BOARD RELAY 10 board ...
Страница 95: ... 86 III Outdoor Unit Components GB HWE0913A ...
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Страница 105: ... 96 IV Remote Controller GB HWE0913A ...
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Страница 124: ... 115 HWE0913A GB VI Refrigerant Circuit 1 Refrigerant Circuit Diagram 117 2 Principal Parts and Functions 126 ...
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Страница 175: ... 166 VII Control GB HWE0913A ...
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Страница 363: ... 354 IX Troubleshooting GB HWE0913A ...
Страница 364: ... 355 HWE0913A GB X LED Monitor Display on the Outdoor Unit Board 1 How to Read the LED on the Service Monitor 357 ...
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