Indoor Unit Control Pcb Switches And Functions - Sanyo SPW-C256VH Technical Data & Service Manual

4-3. Indoor Unit Control PCB Switches and Functions

[Indoor unit control PCB]
T10 (CN061):
EXCT (CN073):
DISP (CN072):
CHK:
JP1 (J01):
4
Fan drive:
Filter:
Power LED:
EEPROM (IC10):
GRL (CN020):
•
There are 5P, 6P, 7P and 8P control PCB types for indoor units.
5P terminal board 5P terminal board
1 2 3 4 5
1(L)2(N) 4 5
Power Power Inter-unit
Inter-unit
supply
control wiring
supply
control wiring
K Type
6P plug (YEL) / Used for remote control operation. (Refer to the Remote Control Section.)
Control items: (1) Start/stop input
(3) Start signal output
2P plug (RED) / Can be used for demand control. When input is present, forces the unit to
operate with the thermostat OFF.
2P plug (WHT) / Short-circuiting this plug allows operation to be controlled by the remote
controller even when an outdoor unit is not connected. (In this case, alarm "E04," which
indicates trouble in the serial communication between the indoor and outdoor unit, does not
occur.)
2P plug (WHT) / Test pin. Short-circuiting this pin allows the indoor FM (H fan speed),
drain pump, fl ap motor (F1 position), and electronic expansion valve full-open position to be
checked.
However this function turns OFF if the indoor unit protection mechanism is activated.
The components will operate even if the remote controller and outdoor unit are not
connected, however the remote control cannot be used for control even if it is connected.
This plug can be used for short-term tests.
Jumper wire / Allows selection of the T10 terminal start/stop signal. (Refer to the Remote
Control Section.)
Setting at time of shipment: Pulse signal
Jumper wire cut: Static signal (continuous signal)
2P plug (WHT) / This terminal sends the signal to the ventilation fan when a commercially
available ventilation fan is operated by the FAN button on the wired remote controller. (Refer
to the Remote Control Section.)
Use a ventilation fan which can accept the no-voltage contact A signal as the external input
signal.
2P (WHT) / This terminal is used to connect contact input from the differential-pressure
switch, used to detect fi lter clogging. When the contact is ON, "FILTER" appears on the
display of the wired remote controller.
LED (RED) / Illuminates when the power is ON. Flashes when there is trouble with the
EEPROM (IC10, IC010: nonvolatile memory).
Nonvolatile memory / Used to store model information and other data. When replacing
the PCB, remove the EEPROM from the old PCB and install it onto the new PCB. If there is
IC trouble, replace with a new IC (provided with the servicing PCB), and set the necessary
information using the wired remote controller. (For the setting procedure, refer to the
servicing technical materials.)
•
For AC fan motor (CR-UXRP71B-B (or CB-UXRP71B-B)) – 3P (YEL)
•
For DC fan motor (CR-SXRP56B-B) – 5P (BLU)
6P terminal board
6P terminal board
L N U1 U2 R1 R2
POWER
REMOTE
POWER
REMOTE
SUPPLY
UNIT
CONTROL
SUPPLY UNIT
CONTROL
LINE
CONTROL CONTROL
LINE
LINE
LINE
XM, US Type
(2) Remote controller prohibit input
(4) Alarm signal output
7P terminal board
7P terminal board
U1 U2
1(L) 2(N) R1
Remote
Inter-unit
Power supply
Power supply Inter-unit
control wiring controller
control wiring
controller
X, T, D Type
4-18
8P terminal board
8P terminal board
1 2 U1
1(L)2(N)
Power Power
supply
supply
R2
U1 U2
Inter-unit
Inter-unit
Remote
control wiring
control wiring
U Type
U2 R1 R2
R1 R2
Remote Remote
controller
controller