Mitsubishi Electric MXZ-8B48NA Installation Manual page 15

9. Special Functions
® Remote control panel
Relay circuit
© Procure locally
© Max. 10 m (33 ft.)
© External input adapter (PAC-SC36NA) ® Orange
® Outdoor unit control board ® Brown
© Relay power supply @ Red
Fig. 9-1
— ®- ©
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® Remote control panel
Relay circuit
© Procure locally
© Max. 10 m (33 ft.)
© External input adapter (PAC-SC36NA) ® Orange
® Outdoor unit control board © Brown
© Relay power supply @® Red
Fig. 9-2
© ©
©
Liele CNS1
@ 5¢
© © 41,
® 3
. —_-
°
xX; Y
°
°
| © O—
Li: Error display lamp
L2: Compressor operation lamp
X,Y: Relay (Coil standard of 0.9W or less for DC 12V)
X,Y: Relay (DC1mA)
Fig. 9-3
© © ©
O16G CN3S
X 2
'e © O
© 3/6) >
i Y
| ©
Fig. 9-4
9.1. Low noise mode (on-site modification) (Fig. 9-1)
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 capacity may be insufficient according to the outdoor temperature and condi-
tions, etc.
@® Complete the circuit as shown when using the external input adapter (PAC-
SC36NA). (Option)
9.2. Demand function (on-site modification) (Fig. 9-2)
* It is possible to reduce electricity consumption within a range from 0 to 100 per-
cent by performing the following on-site installation.
The demand function can be enabled by adding a commercially available input
contact point ON/OFF switch to the CNDM connector (the contact point demand
input, option).
@® Incorporate the "Adapter for external input (PAC-SC36NA)" into the circuit as
shown in the diagram on the left.
® By switching SW7-1 on the control circuit board for the outdoor unit, the following
power consumption restrictions (compared to rated power) can be set.
SW7-1 Power consumption when SW2 is on
OFF 0% (Forced compressor stop)
ON 50%
9.3. Error and compressor operation monitoring function
(CN51)
® Remote control panel
Relay circuit
© External output adapter (PAC-SA88HA-E)
© Outdoor unit control board
® Lamp power supply
© Procure locally
© Max. 10 m (33 ft.)
© Orange
© Yellow
@ Green
9.4. Auto change over - Operation mode locking func-
tion by external signal (CN3S)
® Remote control panel @ Orange
® Relay circuit @® Brown
© External input adapter (PAC-SC36NA) @ Red
© Outdoor unit control board
© Relay power supply
© Procure locally
© Max. 10 m (33 ft.)
ON OFF
swi Heating Cooling
sw2 Validity of SW1 Invalidity of SW1
* Any indoor unit that is operating in a mode different from the one specified by the
external signal will enter the standby mode.
* The setting becomes effective when the outdoor unit is under stop.
* The operation mode specified for the test run has priority over the mode specified
using this function.
15