System Component; 4-1.S, Y Series - Mitsubishi Electric CITY MULTI PEFY-P22VMS-E-S Data Book

4. System component

4-1. S, Y series
4. System component
CITY MULTI system can be monitored or controlled with signal to/from the outside as every control board of Indoor unit or Outdoor unit has input/output signal
connectors. Independent control to the individual Indoor or Outdoor can be carried out by using these connectors. Yet, for large-scale control, MELANS would be
much easier. When using input/output connectors, a dedicated adapter (optional part) and a relay circuit needed to be prepared by the site.
Following are some typical example. Refer to 4-2-2. Input S series for the switch settings and available functions for the S series.
Table 4-1. Control can be achieved by using Outdoor input/output connectors.
Function
Prohibiting cooling/heating operation (thermo OFF) by an external input to the
Demand
outdoor unit.
* It can be used as the demand control for each refrigerant system.
Low noise mode *2, *3 Performs a low noise operation of the outdoor unit by an external input to the outdoor unit.
* It can be used as the low noise operation device for each refrigerant system.
Snow sensor signal input Forces the outdoor unit to perform a fan operation by receiving signals from the
snow sensor. *4
Auto-changeover Cooling/heating operation can be changed by an external input to the outdoor unit.
How to extract signals from the outdoor unit.
Operation status of the
compressor
* It can be used as an operation status display device.
Error status * It can be used for an interlock operation with external devices.
*1 For details, refer to 1) through 4) shown below.
*2 Low noise mode is valid when Dip SW4-4 (*10) on the outdoor unit is set to OFF. When DIP SW4-4 (*10) is set to ON, 4 levels of on-DEMAND are possible, using
different configurations of low noise mode input and DEMAND input settings.
When 2 or more outdoor units exist in one refrigerant circuit system, 8 levels of on-DEMAND are possible. When 3 outdoor units exist in one refrigerant circuit
system, 12 levels of on-DEMAND are possible.
*3 Low noise mode can be switched from ability main to low noise main with Dip SW5-5 on the outdoor unit (except for S series). Dip SW5-5 OFF: ability main (ability
main mode : The sound pressure level is reduced by limiting the maximum fan frequency under the following condition. Cooling mode : outdoor temp. (TH6)<
30°C Heating mode : outdoor temp. (TH6) > 3°C), ON: low noise main.
*4 When multiple outdoor units exist in one refrigerant circuit system, settings on every outdoor unit (signal input) are required.
*5 For detailed drawing, refer to "4-2. Outdoor unit input/output connector".
1) Table 4-1-1 SW4-4 (*10): OFF (Compressor ON/OFF, Low noise mode)
CN3D 1-3P
Open
Short-circuit
CN3D 1-2P
Open
Short-circuit
*6 When SW4-4 (*10) on the outdoor unit in one refrigerant circuit system is set to ON (4 levels or 8 levels or 12 levels of on- DEMAND), thisfunction cannot be used.
*7 This function and the 4 levels or 8 levels on-DEMAND function can be used together. Input the order to CN3D 1-2P on the outdoor unit whose SW4-4 (*10) is set to
OFF.
2) When SW4-4 (*10) on one outdoor unit in one refrigerant circuit system is set to ON (4 levels of on-DEMAND) (*8)
CN3D 1-3P
Open
Short-circuit
Note the following steps to be taken when using STEP DEMAND.
Example: When switching from 100% to 50%
Steps in DEMAND
level setting
3) When SW4-4 on the two outdoor units in one refrigerant circuit system is set to ON (8 levels of on-DEMAND) (*8,*9)
8 levels of on-DEMAND
No.1 CN3D
4) When SW4-4 on the all outdoor units in one refrigerant circuit system is set to ON (12 levels of on-DEMAND) (*9)
12 levels of
No.2 CN3D
on-DEMAND
No.3 CN3D
1-2P
No.1 CN3D
Open
Short-circuit
12 levels of
No.2 CN3D
on-DEMAND
No.3 CN3D
1-2P
No.1 CN3D
Open
Short-circuit
*8 Input the order to CN3D on the outdoor unit whose SW4-4 (*10) is set to ON.
*9 CN3D of No. 1, 2, 3 can be selected arbitrary with the outdoor unit whose SW4-4 is set to ON.
*10 Dip switch numbers vary depending on the model. PUHY: SW4-4, PUMY(P100-140): SW8-1, PUMY(P200-250): SW2-6
Usage
2-level of on-Demand *6
100%(No Demand)
0%
Low noise mode *7
OFF
ON
CN3D 1-2P
Open
100% (No DEMAND)
0%
NO
<WRONG> 100% 0%
OK
<CORRECT> 100% 75%
1-2P
1-2P 1-3P
Open Open
Short-circuit
Short-circuit Open
Short-circuit
1-2P
1-3P
1-2P Open
1-3P
Open Short-circuit
Open
100%
Short-circuit
67%
Open
92%
Short-circuit
84%
1-2P
1-3P
1-2P Open
1-3P Open Short-circuit
Open
92%
Short-circuit
59%
Open
84%
Short-circuit
75%
CONTROLLER
Using connector *5
PUHY/PUMY
Short-circuit
75%
50%
If the demand settings are switched in the wrong order listed as the
wrong example above, the unit may go into thermo OFF mode.
The percentage of the DEMAND listed in the table above is an
50%
approximate value based on the compressor volume and does not
necessarily correspond with the capacity.
50%
This function and the Low noise mode function cannot be used together.
No.2 CN3D
Open
Open Short-circuit
100% (No DEMAND) 50%
50% 0%
88% 38%
75% 25%
Open
Open
Short-circuit
Open Short-circuit Open
67% 92% 84%
34% 59% 50%
59% 84% 75%
50% 75% 67%
Short-circuit
Open
Short-circuit
Open Short-circuit Open
59% 84% 75%
25% 50% 42%
50% 75% 67%
42% 67% 59%
Signal Option
Input
Adapter for external
CN3D *1
(level-signal)
input
(PAC-SC36NA-E)
CN3S
CN3N
Adapter for external
CN51 Output
(level-signal)
output
(PAC-SC37SA-E)
Short-circuit
Open Short-circuit
88% 75%
38% 25%
75% 63%
63% 50%
Short-circuit
Open Short-circuit
Short-circuit Open Short-circuit
67% 34% 59%
34% 0% 25%
59% 25% 50%
50% 17% 42%
Short-circuit
Open Short-circuit
Short-circuit Open Short-circuit
84% 50% 75%
50% 17% 42%
75% 42% 67%
67% 34% 59%
C7-R Rev.
50%
17%
42%
34%
67%
34%
59%
50%
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