43
Special function
(a) Low-level sound priority mode (Local wiring)
(b) On demand control (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
A
Circuit diagram example
(Demand function)
B
On-site arrangement
X, Y: Relay
C
External input adapter
(PAC-SC36NA-E)
D
Outdoor unit control board
E
Maximum 10 m
F
Power supply for relay
By performing the following modification, energy consumption can be reduced to 0–100% of the normal consumption.
The demand function 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.
1
Complete the circuit as shown when using the external input adapter (PAC-SC36NA-E). (Option)
2
By setting SW7-1 on the control board of the outdoor unit, the energy consumption (compared to the normal consumption) can
be limited as shown below.
SW7-1
SW2
SW3
Energy consumption
Demand
function
ON
OFF
OFF
100%
ON
OFF
75%
ON
ON
50%
OFF
ON
0% (Stop)
A
SW2
SW3
Orange
1
3
Brown
Red
CNDM
Y
X
X
Y
F
B
E
C
D
OCH583
