Noise - Mitsubishi Electric PUZ-A12NKA7 Service Manual

(3) Special function
Low-level noise priority mode / Demand control function (Field wiring)
The low-level noise priority mode and the demand control function are available by connection of a commercially available
timer or ON-OFF contactor to the CNDM connector (an optional demand control input).
• In the low-level noise priority mode, the outdoor unit operation noise decreases by approx. 3 to 4 dB compared to usual
• The demand control function decreases the power consumption by 0 to 100% compared to usual.
Notes:
1. The performance may decrease depending on the outdoor temperature or other conditions.
2. To protect the unit from failure, it may not enter to the low-level noise priority mode during cooling operation and at high
ambient temperature.
Wiring example
【CNDM】
Remote control board
Relay
X Y
power
supply
SW1 SW2
Field wiring
SW1 ： Refer to the table below.
SW2 ： Refer to the table below.
X, Y ： Relay
Contact rating: 15 V DC 0.1 A or more
Min. applied load: 5 V DC 1 mA or less
1) Wire a circuit as shown above using an adaptor for external input (PAC-SC36NA).
2) Use SW7-1 on the outdoor controller circuit board to select the low-level noise priority mode or the demand control
function.
3) In the demand control function, set the maximum power consumption (power rating ratio) by combination of two switch
settings as shown in the table below.
Low level sound priority mode
Demand control function
OCH636A
Adaptor for external input
（PAC-SC36NA）
Relay circuit
Orange 1
X
Brown 2
Red 3
Y
Max. wiring length: 10 m
Outdoor controller circuit board SW7-1
OFF
ON
Outdoor controller
circuit board
CNDM
1
3
SW1 SW 2
ON
— Low level sound priority mode activated
OFF
OFF
OFF
ON
ON ON
ON
OFF
72
Function
100% (Normal)
75%
50%
0% (Stop)