Ha Terminal (Hajem-A); Demand Control - Panasonic CS-Z20TKR Service Manual

14.15 HA Terminal (HAJEM-A)


Enable digital connection from indoor unit to external devices.

Control items:
1 Start/stop input.
2 Start/stop signal output.
Monitor output

Condition
1 1-2 (Pulse input): Unit ON/OFF condition switching with a pulse signal.
(1 pulse signal: shortage status 200~300msec)
2 3-4 (Static output): 5V output during the unit ON. No output at OFF.
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).

14.16 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.
200~300msec
ON/OFF input
(Pin 1-2)
(Pin 1-2)
Unit condition
MCU
Indoor Unit
PCB
#A K1KA04AA0347 (Maker: JST; Maker code: B4B-XHTV4)
#B Maker: JST; Maker code: XHP-4
DRED
+5V
ON OFF
+5V
Core
4T
#A4 #B4
1 1
HAJEM-A
240 mm
(XH type)
Max 1900 mm
Relay 1
DRM1
Relay 2
DRM2
Relay 3
DRM3
COM
AIR-CONDITIONER
102
ON
#B4 #A4
1
1