Toshiba MMU-AP0091H service manual 210, Inverter assembly, Exchange of service P.C. board

No.	Part to be	Work procedure	Remarks
	exchanged
5	Inverter assembly	REQUIREMENT

MRemoval of P.C.

board and	Wear protective clothing on your hands	4. IPDU P.C. board for fan
electric parts	as other components may cause and	1. Noise filter		2. Interface P.C. board
	injury etc.	P.C. boards		(Control P.C. board)
1. Noise filter P.C.	1) Stop the unit operation and turn off the
board
2. Interface P.C.	power supply to the unit.
	2) Remove the cables and then the P.C.
board
	board from the board edge spacer at the
	corner.
	Exchange of service P.C. board
	For the interface P.C. board, it is necessary
	to set up the jumper links, etc for each	3. IPDU P.C. board
	model.
		(For driving of compressor 1)
	Refer to “Exchange procedure of interface		3. PDU P.C. board
	P.C. board”.		(For driving of compressor 2)
3. IPDU P.C.	1) Stop the unit operation and turn off the
board	power supply to the unit.

2)Remove the heat sink (Radiator plate) fixing screws.

∗ (M4 × 16, 2 pcs.)

3) Remove the cables.

2) Screw

4)Remove the P.C. board from the card edge spacer at the corners.

∗ Heat sink fixing screw, compressor lead cables (U, V, W), etc, M4 screw tightening torque (1.47±0.1N•m)

Exchange of service P.C. board

For the IPDU P.C. board, it is necessary to set up the jumper links, etc for each model.

Refer to “Exchange procedure of IPDU P.C. board”.

4. IPDU P.C.	1)	Stop the unit operation and turn off the
board for fan		power supply to the unit.
	2)	Remove the wires.
	3)	Remove the heat sink (Radiator plate)	3) Screw
		fixing screws.

* (M4 × 8, 4 pcs.)

∗ Tightening torque of screw for heat sink fixing board (1.47 ± 0.1N•m)

210