Mitsubishi FDC121KXZEN1-W Technical Manual page 275

2. Exchange
2.1 Remove the screw from support panel and rotate the support panel to counterclockwise direction as shown in Fig.5.
(By doing so, you can see the locking spacer of the inverter PCB.)
2.2 Disconnect the connectors and round terminals, and remove the screws on the IPM (IC2) as shown in (D) in Fig.6.
2.3 Remove the inverter PCB.
2.4 Wipe off the silicone grease neatly on the heat sink.
2.5 Match the setting of new PCB switches (JSW10, 11) with former PCB. (Refer to Fig.6)
2.6 Paste a bundled silicone grease uniformly on the radiating surface of the IPM (IC2) on the new PCB, and attach
the new PCB. Without silicone grease pasting or its irregularities in the surface may damage to the inverter PCB.
(One-third to a half of the grease tube is adequate volume.)
2.7 Tighten the screws of IPM (IC2) on new PCB (Refer to table for recommended tightening torque), and
reconnect the connectors and round terminals as before. (Confirm that the connectors are not half inserted.)
3. Installation
3.1 Return the support panel to original position and tighten with the screw as before.
3.2 Install the control panel to nail-part on controller as shown in fig.7. And, pull out the CNP1 connector to
control PCB side from the grommet after bundle the wiring to clamp as shown in fig.7.
3.3 Tighten the screws of electrolytic capacitor as shown Fig.8. (Refer to table for recommended tightening torque)
3.4 Reconnect the CNLA connector, and faston terminals to A.F. module ("P" and "N2") as before.
3.5 Pass the white wiring through CT1 on the control PCB (Refer to Fig.7), and tighten the screw of TB6 in the N.F. PCB
as before. (Refer to table for recommended tightening torque)
Using bands in the package, bundle the wiring at cutting point on 1.4 and 1.5 as before. (Refer to Fig.3 and Fig.7)
3.6 Tighten the screws (8 places) as shown in Fig.4 as before.
3.7 Reconnect the connectors and round terminals to control PCB and the user side of terminal block as before.
(Confirm the connectors are not half inserted.) (Refer to table for recommended tightening torque)
Parts Ref.No
IPM
Inverter PCB TB1-11
N.F. PCB
L,N,E,E(SL)
Terminal block
A1,A2,B1,B2
Electrolytic capacitor
A.F. module
Rotate
Screw
Support panel
Fig.5 Inverter side view of controller
Sequence Position
1 A
2 B
IC2
3 A
4 B
- -
TB6 - -
- -
- -
C1 - -
Table recommended tightening torque
Tightening torque
0.2 ～ 0.44 N ・ m Initial
1.2 ～ 1.4 N ・ m Final
-
2.0 ～ 2.4 N ・ m
-
1.2 ～ 1.4 N ・ m
-
1.2 ～ 1.4 N ・ m
-
1.2 ～ 1.4 N ・ m
-
2.5 ～ 2.7 N ・ m
273
- -
'20 • KX-T-373
Support panel
Inverter PCB
IPM (IC2)
Ⓐ Ⓑ