101
Example of wiring:
Note: The wire length from indoor unit to the external interface must be within 1.9 meters. The wire must be double
insulation type and a ferrite core to be added to reduce noise. Proposed core spec is J0KE00000147 with Heat
Shrinkage Tube.
The signal between indoor unit and the external interface must be isolated by photo-coupler of approval type (e.g:
Semko, VDE etc).
14.13 Demand Control
When the air-conditioner connected to Demand Response Enabling Devices (DRED), the power consumption
especially during peak hours could be controlled.
Three Demand response modes (DRM) are available
o
DRM1 = Compressor cut off
o
DRM2 = Operate at 50% of rated input power
o
DRM3 = Operate at 75% of rated input power
During DRM, the Power Indicator blinks (3 seconds ON and 0.5 seconds OFF) to indicate the compressor cut off
status.
14.14 Pump down Operation by CN-S
A convenience method to activate pump down operation.
Control start condition:
o
During power standby condition, short CN-S continuously between 1 second and 10 seconds.
Control
stop
condition:
o
480 seconds after pump down operation starts.
o
CN-S is shorted again during pump down operation.
MCU
HAJEM-A
(XH type)
Indoor Unit
PCB
+5V
1
1
1
1
#A4
#A4
#B4
240 mm
Max 1900 mm
#A K1KA04AA0347 (Maker: JST; Maker code: B4B-XHTV4)
#B Maker: JST; Maker code: XHP-4
#B4
Core
4T
Relay 1
Relay 2
Relay 3
DRED
AIR-CONDITIONER
DRM1
DRM2
DRM3
COM
