Mitsubishi Electric Mr.Slim PAR-30MAA Technical Manual page 86

6. Mode set by external input
6.1 Low -level sound priority mode (Local wiring)
By performing the following modifi cation, operation noise of the outdoor unit can be reduced by about 3-4 dB.
The low noise mode will be activated when a commercially available timer or the contact input of an ON/OFF switch is added to
the CNDM connector (option) on the control board of the outdoor unit.
● The ability varies according to the outdoor temperature and conditions, etc.
Complete the circuit as shown when using the external input adapter (PAC-SC36NA). (Option)
SW7-1 (Outdoor unit control board): OFF
SW1 ON: Low noise mode
SW1 OFF: Normal operation
X
SW1
86
Orange
X
Brown
Red
A Circuit diagram example
(low noise mode)
CNDM
B On-site arrangement
1
C External input adapter
(PAC-SC36NA)
3
X: Relay (DC15V. 0.1 or more)
D Outdoor unit control board
E Max. 10 m
F Power supply for relay