Explanation Of Functions (Cr-Kr74Gxh56A, Cr-Kr254Gxh56A, Pow-Kr74Gxh56) - Sanyo ECO-i AHX0752 Technical Data Manual

2. Indoor Unit Control PCB Switches and Functions

2-5. Explanation of Functions (CR-KR74GXH56A, CR-KR254GXH56A, POW-KR74GXH56)

T10
(CN105)
(for remote control)
EXCT
(CN009)
DISP
(CN010)
CHK
(CN011)
JP001
FAN DRIVE
(CN017)
6P fl ag (yellow): Used for remote control.
Control items: Start/stop input
Start signal output
2P plug (red): Can be used for demand control. When input is present, forces the unit to
oparate with the thermostat OFF.
Examples of wiring
* Lead wire with 2P plug (special-order part: WIRE K/854 05280 75300)
EXCT
(2P plug (red))
Indoor unit control PCB
Note: The length of the wiring from the indoor unit control PCB to the relay must be 6.6ft or
less.
2P plug (white): Short-circuiting this plug allows the unit to be operated by the remote
controller, even if it is not connected to an outdoor unit. (In this case, alarm "E04," which
indicates trouble in the serial communication between the indoor and outdoor unit, does not
occur.)
2P plug (white): Test pin. Short circuiting this plug allows the operation of the indoor fan
motor (high) and fl ap motor (F1 position) to be checked.However this test operation stops
if the indoor unit protection mechanism is activated. The unit can be operated even if the
remote controller and outdoor unit are not connected. However even if the remote controller
cannot is connected, it cannot be used to operate the unit. This function can be used for
short-term tests.
Jumper wire: Allows selection of the T10 terminal start/stop signal. Status at shipment: Pulse
signal Jumper wire cut: Static signal (continuous signal)
2P plug (white): This terminal sends a signal to the ventilation fan when the FAN button on
the wired remote controller is used to operate a commercially-available ventilation fan.Use a
ventilation fan that can accept no-voltage A contact as the external input signal.
Examples of wiring
* Lead wire with 2P plug (special-order part: WIRE K/854 05280 50600)
FAN DRIVE
(2P plug
(white))
Indoor unit control PCB
Note: The length of the wiring from the indoor unit control PCB to the relay must be 6.6ft or
less.
7-13
Remote controller prohibit input
Alarm signal output
Relay (field supply)
Relay (field supply)
DC 12V
PCB and Functions
Relay coil signal
To external-control input
terminal on ventilation fan
1
2
3
4
5
6
7
8