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8. Initial settings for refrigerant leakage detection function
Remote control button positions
A
C
B
D
Operation mode Compressor information Outdoor unit information Indoor unit information
Activate/cancel maintenance mode
Fig. 8-1
[Display
]
Refrigerant
A
leakage detection
(initial teaching)
GAS LEAK
TEST START
[Display
] Waiting for stabilization
D
Fig. 8-3
9. Special Functions
A
X
X
SW1
A Circuit diagram example (low noise mode)
B On-site arrangement
C External input adapter (PAC-SC36NA)
X: Relay
RP71–140
A
Y
SW2
Y
RP170, 200
A
X
Y
X
SW2
SW3
Y
Fig. 9-2
A Circuit diagram example (Demand function)
B On-site arrangement
X, Y: Relay
Confirm
Refrigerant leakage
detection judgment
GAS LEAK
Fig. 8-2
JUDGE
Stabilized
After 45 minutes
C
D
CNDM
Orange
1
Brown
Fig. 9-1
Red
3
D Outdoor unit control board
E Max. 10 m
F Power supply for relay
C
D
CNDM
Orange
1
Brown
Red
3
C
D
CNDM
Orange
1
Brown
Red
3
C External input adapter (PAC-SC36NA)
D Outdoor unit control board
E Max. 10 m
F Power supply for relay
This air conditioner (outdoor unit) can detect refrigerant leakage which may happen
during a long period of use. In order to enable the leakage detection, the following
settings are required to let the unit memorize the initial conditions (initial learning).
* Except RP170, 200.
Caution:
Make sure to perform the "7. Test run" and confi rm the unit works without
any problems, before starting the following settings.
► How to select the "Refrigerant Leakage Detection" mode
Detection is possible regardless the unit's operation (ON or OFF).
1 Press
button for more than 3 seconds to switch to the maintenance
TEST
mode.
[Display
]
A
MAINTENANCE
► How to start the initial learning
2 Press
CLOCK
button and select the [GAS LEAK TEST START] (Fig. 8-2)
* The initial learning for the leakage detection is always done once after the new
installation or the data reset.
Press
( ) button to confirm. (Fig. 8-3)
FILTER
How to finish the initial learning
Once the unit's operation is stabilized, the initial learning is completed.
Press
button for more than three seconds to cancel the initial learning.
TEST
The initial learning can also be cancelled by pressing
* Refer to the Technical Manual for the refrigerant leakage detection judgment method.
9.1. Low noise mode (on-site modifi cation) (Fig. 9-1)
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.
1 Complete the circuit as shown when using the external input adapter
(PAC-SC36NA). (Option)
2 SW7-1 (Outdoor unit control board): OFF
3 SW1 ON: Low noise mode
SW1 OFF: Normal operation
9.2. Demand function (on-site modifi cation) (Fig. 9-2)
By performing the following modifi cation, 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). (Option)
2 RP71-140
By setting SW7-1 and SW7-2 on the control board of the outdoor unit, the ener-
gy consumption (compared to the normal consumption) can be limited as shown
below.
SW7-1
SW7-2
OFF
OFF
ON
OFF
OFF
ON
• RP170,200
By setting SW7-1 on the control board of the outdoor unit, the energy consump-
tion (compared to the normal consumption) can be limited as shown below.
SW7-1
SW2
OFF
ON
Demand
ON
function
ON
OFF
button.
ON/OFF
Energy consumption (SW2 ON)
0% (Stop)
50%
75%
SW3
Energy consumption
OFF
100%
OFF
75%
ON
50%
ON
0% (Stop)
13
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