Technibel CAFP 124 R Technical Data & Service Manual page 93

PCB Settings Section
1. Indoor Unit Control PCB Switches and Functions
[Indoor unit control PCB]
T10 (CN61-15): 6P plug (YEL) / Used for remote control operation. (Refer to the Remote Control Section.)
Control items:
EXCT (CN73-9): 2P plug (RED) / Can be used for demand control. When input is present, forces the unit to
operate with the thermostat OFF.
DISP (CN72-10): 2P plug (WHT) / Short-circuiting this plug allows operation to be controlled by the remote con-
troller 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.)
CHK (CN71-11): 2P plug (WHT) / 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 connect-
ed, however the remote control cannot be used for control even if it is connected. This plug
can be used for short-term tests.
JP1 (J01): 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)
Fan drive (CN32-17): 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.
Filter (CN70-12): 2P (WHT) / This terminal is used to connect contact input from the differential-pressure
switch, used to detect filter clogging. When the contact is ON, "FILTER" appears on the dis-
play of the wired remote controller.
Power LED: LED (RED) / Illuminates when the power is ON. Flashes when there is trouble with the
EEPROM (IC10, IC010: nonvolatile memory).
EEPROM (IC10-02): 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 servic-
ing technical materials.)
G
GRL (CN20): For AC fan motor (CR-TRP50A) – 3P (YEL)
G
For DC fan motor (CR-SRP50A) – 5P (BLU)
G
There are 5P, 7P and 8P control PCB types for indoor units.
5P terminal board
1 2 3 4
1(L)2(N) 4
Power Inter-unit
supply
control wiring
MAFP Type
(1) Start/stop input
(3) Start signal output
5
5
1(L) 2(N)
Power supply
(2) Remote controller prohibit input
(4) Alarm signal output
7P terminal board
U1 U2 R1 R2
Inter-unit Remote
control wiring
controller
SPAFP Type
2 - 11
2
8P terminal board
1 2 U1 U2 R1 R2
1(L)2(N) R1 R2
Power Remote
controller
supply
U1 U2
Inter-unit
control wiring
DSAFP Type