York TIWM006B21S Installation And Maintenance Manual page 32

(7) The electrical wiring connection for the indoor unit is shown in the section 8.2.2 and Fig. 8.1 below.
(8) If Power Supply Voltage (208V/230V) is introduced into the Communication Line:
If 208V/230V are applied to the communication line at (Terminals 1 and 2 of TB2) by mistake, the fuse
on the PCB for the communication line will blow. In this case, perform the recovery work as shown in
the diagrams below.
(a) Reconnect the wirings correctly.
(b) Set the No.1 pin at DSW7 (on the PCB) to ON.
Upon PCB recovery after the fuse has been replaced, if 208V / 230V is reintroduced into the
communication line, the PCB will be seriously damaged and will not recover.
L1
AC 208/230V
5V
(9) Wireless Controller Connection.
For the wireless controller, setting the SW2 is not required.
(The initial setting before shipment is "Wireless".)
Outdoor Unit
NOTE:
For group control (multiple unit control), with single controller, a wired controller or receiver kit is
required.
(The group control is NOT available with the wireless controller if the built-in receiver is only used.)
28
N
A B 1 2
(Mp)
Incorrect Wiring
Fig. 8.1 Recovery from a Blown Fuse.
Indoor Unit Indoor Unit
A B
Wireless Wireless
Controller Controller
N
L1 A
(Mp)
AC 208/230V
5V
Reconnect wirings correctly.
A B
PCB1
DSW7
B 1 2
ON
OFF
1 2
Set No.1 Pin
at ON side.
DIP Switch PCB
SW2
Wired
Wireless
Setting is NOT required.
P5417052