1P398933-1C
1. Remove the front panel and the front grille and service lid of
indoor unit.
(Refer to the front page for the removal of each part in detail.)
2. Remove the electrical wiring box cover.
1. Install the HA PCB (this set). (See Fig. 1)
1) Install the HA PCB (this set) to the electrical wiring box.
2) Insert the connector of the HA PCB (this set) to the connector (S403) on the electrical wiring box.
2. Connect the HA connection cord. (See Fig. 1 and 2)
1) Insert the HA connection cord into the HA connector “S21” (white) on the HA PCB (this set).
2) Route the HA connection cord as shown in Fig. 2.
If there is workspace on the right-hand side of the indoor unit, the installation work can be
conducted without removing the electrical wiring box.
Connect HA without removing the electrical wiring box, if possible.
Connecting HA PCB
Removal of Electrical Wiring Box Cover
Removal of Electrical Wiring Box
Fig. 1 Connection points of the HA PCB
Fig. 2 Routing HA connection cord
1. Disconnect the inter-unit wire.
2. Disconnect the fan motor connector (S200) and swing motor connector (S6).
3. Disconnect the thermistor and ground/earth wire from the heat exchanger (2 screws).
(Some models may not have ground/earth wire.)
4. Remove the mounting screw of the electrical wiring box (1 screw).
HA PCB
HA connector “S21” (white)
Installing HA PCB on the electrical wiring box
Electrical wiring box
Back of the HA PCB
Spacer
S403
Insert the cord
into the S403
connector.
HA connector “S21” (white)
HA PCB
Electrical wiring box
Mounting screw of
electrical wiring box
*The position of the ground/earth wire
may differ depending on the model
Make sure that the mounting
bracket of the thermistor will not
fall off.
Thermistor
Inter-unit wire
Ground/Earth wire*
(Green/Yellow)
Ground/Earth wire*
(Green)
S200
S6
WARNING
• Be sure to turn OFF the power at the time of
installation work.
Touching any electric parts with the power
turned ON may cause electric shock.
Electrical wiring box cover
Disengage the hooks.
Electrical wiring box
If there is workspace on the right-hand side of the
indoor unit, the installation work can be conducted
without removing the electrical wiring box.
After connecting the HA PCB (this set),
return all removed parts to their original
positions.
After connecting the HA PCB (this set),
return all removed parts to their original
positions.
After connecting the HA PCB (this set),
return all removed parts to their original
positions.
1P398933-1C.indd 2
5/11/2016 12:05:18 PM
