– 104 –
CN601~
CN608
CN301 CN300
CN704
CN701
CN703
CN702
P.C. board base
P.C. board
No.
Part name
Control
board
assembly
Procedure
1) Disconnect lead wires and connectors connected from
the control board assembly to other parts.
1. Lead wires
• Connection with terminal block : 10 wires
(Red, Orange, Pink, Yellow,
Two black wires, Four white wires
• Connection with compressor :
Remove the fastons (3 places).
• Connection with reactor :
Remove the connector from P08, 09 (2P, White)
and P12, P13 (2P, Gray).
• Connection with 4-way valve :
Remove the connector (3P).
• Connection with case thermo. :
Remove the connector (2P).
2. Connectors
• Sub-control board assembly side
CN300 : Outdoor fan (3P, White)
CN301 : Outdoor fan position detection (5P, White)
CN601 : TO sensor (2P, White)
CN602 : TD sensor (3P, White)
CN603 : TS sensor (2P, Black)
CN604 : TE sensor (2P, White)
CN605 : TGa sensor (3P, Yellow)
CN606 : TGb sensor (3P, White)
CN607 : TGc sensor (3P, Green)
CN608 : TGd sensor (3P, Blue)
CN701 : A room pulse modulating valve (6P, Yellow)
CN702 : B room pulse modulating valve (6P, White)
CN703 : C room pulse modulating valve (6P, Red)
CN704 : D room pulse modulating valve (6P, Blue)
2) Disconnect cable connecting the main control board
assembly side and sub-control board assembly.
• Main control board assembly side
CN06 : Connecting cable (5P, White)
• Sub.-control board assembly side
CN800 : Connecting cable (5P, Red)
3) Remove the control board assembly from P.C. board
base.
1. Main control board assembly side
• Remove two claws of P.C. board base, and remove
upward the heat sink by hands.
• Remove three screws fixing the heat sink and main
control board assembly side, and replace the board
with a new one.
2. Sub- control board assembly side
• Remove P.C. board base from the inverter box.
• Remove three claws of P.C. board base, and
replace the board with a new one.
Remarks
When mounting a new board, check
that the board is correctly set in the
groove of base holder of P.C. board
base.
CN300, CN302, CN303, CN501,
CN604, CN606, CN701, CN702,
CN703, CN704, 4-way valve
connector, case thermo. connector
at the sub-control board assembly
side are connectors with locks.
Therefore, remove the connector
while pushing the part indicated by
an arrow.
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