Toshiba MMY-MAP0724HT6UL - Inverter P.C. Board for Compressor Replacement Procedure

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14-1-4.Inverter P.C. board for compressor replacement procedure
This board is commonly installed in different models before shipment. Set the dip switch (SW800) setting of the
service board to the switch setting before replacement.
Replacement Steps:
(1) Turn off the power supply of the outdoor unit and allow at least 3 minute for the capacitor to discharge.
Check the voltage between (A) and (B) to see it is surely discharged before replacement.
(2) Remove all the connectors and fast-on terminals (
1) connected to the Compressor IPDU.
(Remove the connectors and fast-on terminals by pulling the connector body. Do not pull the wire).
(3) Remove all the 4 screws (
2) which secures the Compressor IPDU to the Heat sink.
(These screws are to be re-used after procedure.)
(4) Remove all the 2 screws (
3) which secures the Compressor IPDU to the Frame.
(5) Remove the Compressor IPDU from the 4 spacers (
4) by pinching the top of the spacers by round-nose pliers
or cutting the top of the spacers by nippers.
Parts code Description Applicable model P.C. board type code Product code
431 6V 489 Inverter P.C. board for
Compressorr
MMY-MAP0724HT6UL
MMY-MAP0964HT6UL
MMY-MAP1144HT6UL
MCC-1596 ASM-PCB (A3IPDU)
4
1
3
4
1
4
1
2
1
1
1
2
3
4
4
1
1
4
Compressor IPDU
Black wire
White wire
(A) DB01 (+)
White wire
Pinch this part by
round-nose pliers
for removing the PCB.
Ex. MMY-MAP0724HT6UL
Compressor IPDU
(MCC-1596)
Screw
Spacer
(4 Spacer are in packed in this
service assembly)
Spacer
SW800
Spacer
Fixation screw
Black wire
Red wire
Screw
(6) There is the model which used the heat transfer sheet (flesh color)
or the heat transfer paste (white color) on the heat sink. In the case
with the sheet, confirm that no dirt or damage is on the sheet. As it
can reduce the heat transfer efficiency, and can cause a breakdown.
If the sheet comes off the heat sink, re-apply the sheet as shown in
the following figure.
(B) DB01 (-)
Fixation screw
Red wire
Spacer
Cut this part by nippers
for removing the PCB.
Cut
or
Spacer
Spacer
Remove the
PCB
∗ Reuse the heat transfer sheet..
Using a little heat transfer paste on the heat
sink will make easier to install, because the
heat transfer sheet will stick to the heat sink.
Heat transfer sheet (flesh color)
Spread it on the heat sink