– 110 –
No.
3
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 : 7 wires
(Red, Orange, Pink, Yellow, Black and two White
wires)
• Lead connected to compressor :
Disconnect the connector (3P, White).
• Lead connected to reactor :
Disconnect the two connectors (2P, White) and
P12, P13 (2P, Gray).
• Connection with 4-way valve :
Remove the connector (3P, Blue).
• Connection with case thermo. :
Remove the connector (2P, White).
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 (2P, Blue)
CN701 : A room pulse motor valve (6P, Yellow)
CN702 : B room pulse motor valve (6P, White)
CN703 : C room pulse motor valve (6P, Red)
CN704 : D room pulse motor valve (6P, Blue)
*1: Heat pump model only
2. Disconnect cable connecting the main control board
assembly side and sub-control board assembly.
• Main control board assembly side
CN04 : Connecting cable (3P, White)
CN05 : Connecting cable (2P, White)
CN06 : Connecting cable (5P, Red)
CN13 : Connecting cable (5P, Red)
• Sub-control board assembly side
CN302 : Connecting cable (3P, White)
CN303 : Connecting cable (2P, White)
CN800 : Connecting cable (5P, Red)
CN501 : Connecting cable (3P, Red)
3. The connecting cable connecting compressor and P.C.
board base and that connecting reactor and P.C.
board base are fixed to the inverter box with bundling
band. Cut off bundling band.
4. The connecting cables of the main P.C. board base
and the sub-P.C. board base are fixed with bundling
band. Cut off bundling band.
5. 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.
• Replace the P.C. 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
CN601~
CN608
CN301 CN300
CN704
CN701
CN703
CN702
P.C. board base
P.C. board
CN300, CN302, CN303, CN501,
CN604, CN606, CN701, CN702,
CN703, CN704, 4-way valve
connector, case thermo. connec-
tor at the sub-control board
assembly side are connectors
with locks. Therefore, remove the
connector while pushing the part
indicated by an arrow.
When mounting a new board,
check that the board is correctly
set in the groove of base holder
of P.C. board base.
*1
*1
*1
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