Demand Control; Pump Down Operation By Cn-S - Panasonic CS-RZ25VKRW Service Manual

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
DRM1 = Compressor cut off
o
DRM2 = Operate at 50% of rated input power
o
DRM3 = Operate at 75% of rated input power
o

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:
During power standby condition, short CN-S continuously between 1 second and 10 seconds.
o

Control stop condition:
480 seconds after pump down operation starts.
o
CN-S is shorted again during pump down operation.
o
+5V
MCU
HAJEM-A
Indoor Unit
(XH type)
PCB
#A K1KA04AA0347 (Maker: JST; Maker code: B4B-XHTV4)
#B Maker: JST; Maker code: XHP-4
Relay 1
Relay 2
Relay 3
DRED
106
Core
4T
#A4 #B4 #B4 #A4
1 1
1
1
240 mm
Max 1900 mm
DRM1
DRM2
DRM3
COM
AIR-CONDITIONER