Toshiba HWT-602S21SM3W-E(TR) Service Manual page 221

Exchange
No.
parts name
④
Control board "Detachment (outdoor control board)"
assembly
1) Remove the screws (Φ4 × 10, 2 screws) fixing
2) Remove the earth screw fixing inverter box and
3) Remove the outdoor control board from the P.C.
4) Remove the two fixing screws (Φ4 × 8, 2 screws)
"Attachment (outdoor control board)"
Attach the new outdoor control board in the reverse
process of "Detachment".
Work procedure
inverter box and P.C. board base.
earth lead.
And remove the inverter box.
NOTE
Use a flat-blade screwdriver to remove the inverter
box from P.C. board base hook.
Be careful not to break that the hook when use the
flat-blade screwdriver.
board base. (Remove the heat sink and the
outdoor control board assembly while keeping
them screwed together.)
NOTE
Disengage hooks of the P.C. board base, hold the
heat sink, and lift to remove it.
used to secure the heat sink and sub heat sink.
And remove the heat sink.
NOTE
When mounting new outdoor control board,
confirm that outdoor control board is inserted
properly into the P.C. board base.
Coat the heat sink on the outdoor board with the
heat sink silicone uniformly before installing the
heat sink.
Please following below tighten torque of screws.
Heat sink Sub heat sink
Earth screw
Tightening torque
1.3-1.5 N•M
0.8-0.9 N•M
220
Remarks
P.C board base
P.C. board
base hook
Inverter box
Inverter box
Earth lead