Toshiba MMD-UP0721HFP-UL Service Manual page 91

13. MAIN PART REPLACEMENT METHODS
No. Part to be replaced
Electric parts box cover
①
Indoor control board
②
(MCC-1643)
Work procedure
1. Detachment
1) Turn OFF the air conditioner operation, and turn off the
electric breaker.
2) Remove the screws (colored, 6 pcs) for the electrical
parts box cover.
3) Remove the electric parts box cover.
2. Attachment
1) Screw (colored, 6 pcs) and reinstall the electric parts
box cover in the same way as before replacement.
1. Detachment
1) Remove the electric parts box cover.
(see the 1. of ①)
2) Detach the connectors connected to the board.
CN41 : Remote controller cord (Blue)
CN40 : Indoor/outdoor connecting cord (Blue (leads :
Black))
CN 67 : Power supply (Black)
CN100 : TC1 sensor (Brown)
CN101 : TC2 sensor (Black)
CN102 : TCJ sensor (Red)
CN103 : TF sensor (2P : Green)
CN104 : TA sensor (Yellow)
CN82 : Electronic control valve coil (Blue)
CN521 : UART (Red)
CN34 : Float switch (Red)
CN22 : Earthing wire (Faston)
Unlock the locks on the housing to remove
the connector.
3) Unlock the card edge spacers (4 pcs) at the four
corners of the board, and remove the board.
2. Attachment
1) Secure the board to the card edge spacers (4 pcs).
2) Re-connect the connector which has been removed in
step 1. in the same way as before replacement.
3) Attach the electric parts box cover.
(See the 2. of No. ①)
TF sensor
CN103
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Remarks
Electric parts
Screw
box cover
Screw
Fan control board Indoor control board
(MCC-1610) (MCC-1643)
Noise filter board (MCC-1551)
TCJ sensor
TC2 sensor
CN102
CN101
TA sensor
TC1 sensor
CN104
CN100
Remote
controller cord
CN41
Indoor/outdoor
connecting
cord CN40
Float switch
CN34
UART CN521
Electronic
control valve
coil CN82
Earthing wire
(Faston)CN22
Power supply
CN67