64
Special function
(a) Low-level sound priority mode (Local wiring)
By performing the following modification, 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.
1
Complete the circuit as shown when using the external input adapter (PAC-SC36NA-E). (Option)
2
SW7-1 (Outdoor unit control board): OFF
3
SW1 ON: Low noise mode
SW1 OFF: Normal operation
A
Circuit diagram example
(low noise mode)
B
On-site arrangement
C
External input adapter
(PAC-SC36NA-E)
X: Relay
D
Outdoor unit control board
E
Maximum 10 m
F
Power supply for relay
A
SW1
Orange
1
3
Brown
Red
E
B
F
CNDM
X
X
C
D
OCH533D