Special Functions - Mitsubishi Electric MXZ-8B48NA Manual De Instalación

9. Special Functions
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@ Remote control panel ¢) Procure locally
® Relay circuit @ Max. 10 m (33 ft.)
® External input adapter (PAC-SC36NA) ® Orange
@ Outdoor unit control board ® Brown
® Relay powersupply @ Red
Fig. 9-1
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)
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@ Remote control panel CF) P rocure locally
® Relay circuit @ Max. 10m (33 ft)
® External input adapter (PAC-SC36NA) ® Orange
@ Outdoor unit control board ® Brown
® Relay powersupply @ Red
Fig. 9-2
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i , CN51
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L1 : Error display lamp
L2 : Compressor operation lamp
X Y : Relay (Coil standard of 0.9W or less for DC 12V)
X Y: Relay(DClmA)
Fig. 9-3
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Fig. 9-4
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,
@ Remote control panel
® Relay circuit
® External input adapter (PAC-SC36NA)
® Outdoor unit control board
® Relay power supply
® Procure locally
® Max. 10 m (33 ff.)
Auto change over - Operation mode locking func-
tion by external signal (CN3S)
® Orange
® Brown
@ Red
ON OFF
SWl Heating Cooling
SW2 Validity of SWl Invalidity of SWl
* 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