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13-2.Indoor Unit Address Setting; 13-3.External Input/Output Function - Mitsubishi Electric City Multi PWFY-P36NMU-E-BU Data Book

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13. CONTROL
13-2. Indoor unit address setting
(Be sure to operate with the main power turned OFF.)
SWU2
SWU1
13-2-1. Switch operation (BC controller)
There are two types of rotary switch setting available: setting addresses 1 to 9 and over 10, and setting branch numbers.
a) How to set addresses
Example: If Address is "3", SWU2 (for over 10) remains at "0", and match SWU1 (for 1 to 9) to "3".
b) How to set branch numbers SWU3 (only for R2/WR2-Series)
Match the indoor unit's refrigerant pipe with the BC controller's end connection number. Remain other than R2 at "0".
The rotary switches are all set to "0" when shipped from the factory. These switches can be used to set unit addresses
and branch numbers at will.
13-3. External input/output function
Preset temperature input (external analog input: 4mA-20mA)
External input
Input through CN421, CN422 on the circuit board.
External analog input
Use the supplied connector.
If no temperature settings are made via the MA remote controller, the temperature changes with the current of generator.
Refer to the instructions manual that came with the MA remote controller for how to make the settings.
4 mA → 50 °F (10 °C)
Note: Use a 4-20mA signal output device with insulation.
External output terminal
External output terminal (refer to [Fig. 1-7-A]) is ineffective when the circuit is open.
Refer to [Table 1] for information about each contact.
The current and voltage in the circuit to be connected to external output terminal (TB141A OUT1) must meet the following
conditions.
[Table 1]
Operation ON/OFF
OUT1
Defrost
OUT2
Compressor
OUT3
*1
Error signal
OUT4
*1 This function is available for
PWFY-P36NMU-E-BU.
MEES20K028
SWU3
3
2
1
3
2
1
External
analog input
20 mA → 160 °F (71 °C)
[Fig. 1-7-A]
OUT1
3
2
3
2
1
current
direction
+
+
Current generator
TB141A
OUT2
OUT3
OUT4
AIR TO WATER
1
current
direction
46
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