Indoor Unit Control Pcb Switches And Fanctions; Indoor Unit Control Pcb Switches And Functions - Panasonic S-3650PU3E Technical Data & Service Manual

4-13. Indoor Unit Control PCB Switches and Functions

[Indoor unit control PCB]
T10 (CN061):
EXCT (CN073):
DISP (CN062):
CHK (CN062):
4
JP1 (JP001):
Fan drive (CN032):
Power LED:
EEPROM (IC010):
Power supply cable
6P plug (YEL) / Used for remote control operation. (See 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.
6P plug (BLK) 2-5Pin / Short-circuiting this Pin 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.)
6P plug (BLK) 1-4Pin / Test Pin. Short-circuiting this Pin allows the indoor FM (H fan speed),
drain pump, flap 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 Pin can be used for short-term tests.
Jumper wire / Allows selection of the T10 terminal start/stop signal. (See 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. (See
the Remote Control Section.)
Use a ventilation fan which can accept the no-voltage contact A signal as the external input
signal.
LED (RED) / Illuminates when the power is ON. Flashes when there is trouble with the
EEPROM (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, see the servicing
technical materials.)
L N 1 2 3
Connection cable between
outdoor and indoor unit
Type U3, Type F3
(2) Remote controller prohibit input
(4) Alarm signal output
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