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Mitsubishi Electric PURY-P72 Service Handbook page 33

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[ II Restrictions ]
1) SW4-4: OFF (Compressor ON/OFF, Low-noise mode)
CN3D 1-3P
Open
Short-circuit
CN3D 1-2P
Open
Short-circuit
*1. When SW4-4 on the outdoor unit in one refrigerant circuit system is set to ON , this function cannot be used.
*2. This function can be enabled when the 4-step demand control is enabled. Input the order to CN3D 1-2P on the outdoor unit
whose SW4-4 is set to OFF.
2) When SW4-4 on one outdoor unit in one refrigerant circuit system is set to ON (4 levels of on-DEMAND)
CN3D 1-3P
Open
Short-circuit
*3. Input the order to CN3D on the outdoor unit whose SW4-4 is set to ON.
Note the following steps to be taken when using the STEP DEMAND
(Example) When switching from 100% to 50%
Demand control
steps
If the step listed as the wrong example above is taken, thermo may go off.
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 capacity.
When this function is enabled, the night mode cannot be enabled.
3) When SW4-4 on the two outdoor units in one refrigerant circuit system is set to ON (8 levels of on-DEMAND)
8 levels of on-DEMAND
No.1 CN3D
1-2P
Open
Short-circuit
*3. Input the order to CN3D on the outdoor unit whose SW4-4 is set to ON.
*4. CN3D of No. 1, 2, 3 can be selected arbitrary with the outdoor unit whose SW4-4 is set to ON.
HWE0803A
*1
Compressor ON/OFF
Compressor ON
Compressor OFF
*2
Low-noise mode
OFF
ON
CN3D 1-2P
Open
Short-circuit
100% (No DEMAND)
75%
0% (Compressor OFF)
50%
(Wrong)
100%
(Correct)
100%
1-2P
1-3P
Open
100%
Short-circuit
50%
Open
88%
Short-circuit
75%
- 24 -
0%
50%
75%
50%
No.2 CN3D
Open
Open
Short-circuit
50%
88%
0%
38%
38%
75%
25%
63%
(*3)
(*3, *4)
Short-circuit
Open
Short-circuit
75%
25%
63%
50%
GB
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