Toshiba MD-VNK802HEXE Service Manual page 167

2
Switching the remote controller between invalid / valid or low / high from an external device
(separately sold External Input)
* Perform connection with one of the units in the group.
* Static signal only
Insert the remote ON/OFF adapter NRB-1HE (sold separately) into connector CN705.
• Transmission wire used to extend must be locally procured: Non-polarity, shielded wire (H05 VVC4V5-K or
60227 IEC 74) 0.5 mm
Maximum length: 50 m
If a polar contact such as a photocoupler is used with a no
voltage a-contact, connect the positive pole to terminal (2),
(3) or (4) and the negative pole to terminal (1).
1) When switching the remote controller between invalid / valid from an external device
(locally procured)
(1), (2)
No voltage
a-contact
The remote controller is
inoperable when SW1 is
closed.
As these terminals are not used, insulate them.
SW1 [Remote controller Invalid: ON, Valid: OFF]
• For NRC-01HE (remote controller for the Air to Air Heat Exchanger with DX Coil Unit), when one of the
buttons below is pressed,
* [ON/OFF] button
* [VENT] button
* [VENT MODE] button
* [VENT FAN] button
• For RBC-AMT32E (remote controller for the air conditioner), pressing the [ON/OFF] button has no effect.
• When the remote controller is inoperable, nighttime heat purge operation are not available.
• If a command is sent to one of the units in the group, the invalid / valid setting of the remote controller in
the group can be switched.
2
Adapter for remote ON/OFF control
NRB-1HE
SW1
blinks and the operation is invalid.
Specification of the external contact:
Contact for microcurrent
DC12 V 1 mA
Green (1)
Yellow (2)
Red (3)
White (4)
Black (5)
2 m
165
Installation Manual
CN705
Control circuit board of the
Air to Air Heat Exchanger
with DX Coil Unit