Disassembly Procedure; Control Box - Mitsubishi Electric CITY MULTI PFFY-P20VCM-E Technical & Service Manual

[ VIII Disassembly Procedure ]
VIII Disassembly Procedure

[1] Disassembly Procedure

1. Control box

Be careful removing heavy parts.
1. Removing the control box cover
(1) Remove the fixing screws (three) of the control box, and
remove the cover (A). (Fig.1)
*At this stage, the following servicing is possible. (Fig.2)
1) Operation and check of the switches (listed below) which
are on the control board.
Dip switch SW1 . . . . . . . . . . . . Function change
Dip switch SW2 . . . . . . . . . . . . Capacity code setting
Dip switch SW3 . . . . . . . . . . . . Function change
Dip switch SW4 . . . . . . . . . . . . Model code setting
Dip switch SW21 . . . . . . . . . . . Static pressure setting
Dip switch SW22 . . . . . . . . . . . Function setting
Rotary switches SW11, 12 . . . . Address setting
Rotary switch SW14 . . . . . . . . . Branch port setting
2) Connection check of the lead wires (listed below) which
are connected to the controller board.
Power supply lead wire.
Network remote controller transmission lead wire.
Fan motor lead wire.
LEV lead wire
Intake air sensor lead wire
Liquid piping sensor lead wire
Gas piping sensor lead wire
3) Control board exchange
4) Condenser exchange
5) Fuse (Fuse holder) exchange
6) Relay exchange
7) Intake air sensor exchange
8) Power supply terminal bed exchange
9) Transmission terminal bed exchange x 2
HWE18160
Fig.1
Fig.2
- 24 -
Fixing screws
(A)
GB