Mitsubishi Electric PUZ-HWM140VHA, Service Manual

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61
OCH748
SW2 SW3
Orange
1
3
Brown
Red
CNDM
Y
X
X Y
F
B
E
SW1
Orange
1
3
Brown
Red
E B
F
CNDM
X
X
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
Max. 10 m
F
Power supply for relay
9.9.2. Demand function (on-site modification) (Fig. 9-9-2)
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)
Fig. 9-9-2
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
Max. 10 m
F
Power supply for relay
Fig. 9-9-1
A C D
A
C D
9.9.1. Low noise mode (on-site modification) (Fig. 9-9-1)
1. Using the CNDM connector (Option)
By performing the following modification, operation noise of the outdoor unit can be
reduced.
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
2. Using remote controller
Refer to the indoor unit installation manual.
SPECIAL FUNCTION