Mitsubishi Electric PUHZ-RP3VHA Technical & Service Manual page 50

(2) Function of connectors and jumpers
Types Connector
Connector CN31
J1
J3
J4
Jumper
J5
J6
Special function
a) Low-level sound priority mode (Local wiring)
Unit enters into Low-level sound priority mode by SW7-1, 2 and external signal input setting.
Inputting external signals to the outdoor unit decreases the outdoor unit operation sound 3 to 4 dB lower than that of usual.
Adding a commercial timer or on-off switch contactor setting to the CNDM connector which is optional contactor for Demand
input located on the outdoor controller board enables to control compressor operation frequency. In Low-level sound priority
mode, the maximum outdoor fan steps is regulated to 8 and the maximum operation frequency of the compressor is
regulated to specified range in cool mode. In heating mode, the maximum compressor operation frequency is regulated to
specified range.
W The performance is depends on the load of conditioned air of the room.
How to wiring
<Low-level sound priority mode circuit>
Insulate this point securely as
this is not used.
Purchased at local
Relay
supply
~
SW1
X
SW1 : Switch
X : Relay (Contact spec. : DC1mA)
1) Make the circuit as shown above with Adaptor for external signal input(PAC-SC36NA).
2) Turn SW1 to on for Low-level sound priority mode.
Turn SW1 to off to release Low-level sound priority mode and normal operation.
(b) On demand control (Local wiring)
Demand control is available by external input. In this mode, the outdoor unit stops and indoor unit operates with fan mode.
W The setting of SW-7 is not required for the demand control.
How to wiring
Basically, the wiring is the same.
Connect an SW 1 which is procured at field to the between Orange and Red(1 and 3) of the Adaptor for external signal
input(PAC-SC36NA), and insulate the tip of the brown lead wire.
Function
Emergency operation
Power supply setting
Capacity settings
Adaptor for external
signal input
(PAC-SC36NA)
X
Max. 10 m including local wiring
Action by open/ short operation
Short
Start
Single phase
3 phase
:Short
Jumper
J3 J4 J5 J6
Model
PUHZ-RP3VHA
PUHZ-RP4VHA
PUHZ-RP5VHA
PUHZ-RP6VHA
Outdoor unit
controller board
Red
3
3
Brown
2 2
Orange
1
1
CNDM
50
Effective timing
Open
When power supply ON
Normal
Always
Always
:Open
<Outdoor unit controller board>
CNDM