Mitsubishi Heavy Industries FDT200VSAWPVH Service Manual page 57

Control PCB
Remove harnesses from bands.
And, remove the harnesses which are
bundled by these bands from clips and
connectors on the control PCB.
Fig.3 Target places which are removed harnesses and screws
Harness
Procedure on tightening harness (Snubber capacitor) and power transistor with screw.
A metallic connection binder is set in each hole of the inverter PCB of "P", "N", "U", "V", and "W" beforehand.
Then tighten the harness (Snubber capacitor) and the power transistor with the screw together.
(Set the harness wires to be fixed to "U" and "W" with screws in respective holes after passing them through IC21 and 22.)
(Connect the snubber capacitor with "P" and "N".)
(A) Power source for control PCB : CNA1, 1 –3 pin or CNA2, 1 - 4 pin
※：Presence and shape of electric component
may vary according to a model.
(B) Power source for fan motor (DC) : CNA2, 1 - 3 pin or CNA1, 1 - 4 pin
Fig.2 Voltage measurement points
※：Presence and shape of electric
component may vary according
to a model.
Remove screws.
(4 places)
Terminal
Inverter PCB
Power transistor
Fig.5 Installation method to power transistor
56
-
(－) (＋)
or
(＋) (－)
(＋)
or
(－)
Fig.4 Installation place of inverter PCB
Snubber capacitor
Connection binder (Metallic pillar)
-
'21 • PAC-SM-383
(＋)
(－)
(C) Voltage measurement point
of power source for inverter
: DM (+) – DM (–)
Inverter PCB
Snubber capacitor