Operation Board (Ec3); Ct Board (Ec7) - Daikin LX10F11B3 Service Manual

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4.8.6 Operation board (EC3)

X41A X42A
●Replacement procedure
1. Removing operation board
1) Remove the three cables that connect to
operation board from the connector.
2) Remove the four mounting bolts.
2. Mounting operation board
Reverse the above procedure to mount operation
board using the four bolts and connect the cable.
3. Necessity for configuration setting
When using operation board from Daikin spare
parts, configuration setting is not required.
Configuration setting for operation board from
spare parts is not made but that memorized on
CPU board is automatically sent to operation
board when power is supplied.
Mountng hole (4 pcs.)
X43A
4.8.7 PT/CT Board (EC7)
This printed circuit board has the two functions as
a measuring instrument and protective device and
provide as an interface between the main circuit
(high voltage) and controller.
●Function
Function
Voltage Voltage and phase sequence
and phase detection between R phase and S
sequence phase is executed by transferring the
detection voltage waveform to the controller.
Current Total running current of EFM and
detection CFM are detected.
●Replacement procedure
①Loosen the four mounting bolts.
② After replacing the main body, mount the
connector by following the original procedure.
③ After checking the connections thoroughly, carry
out P.T.I to confirm the operation.
（S）
T
S
R
Connector X61A
4-18
PT/CT board
(EC7)
Description
Mounting hole (4 pcs.)