York TIWM018B21S - Page 32

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P5417052
(7) The electrical wiring connection for the indoor unit is shown in the section 8.2.2 and Fig. 8.1 below.
(9) Wireless Controller Connection.
For the wireless controller, setting the SW2 is not required.
(The initial setting before shipment is “Wireless”.)
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.)
Fig. 8.1 Recovery from a Blown Fuse.
L1
N
(Mp)
Incorrect Wiring
5V
AB
12
A
C 208/230V
ON
OFF
DSW7
Set No.1 Pin
at ON side.
PCB1
12
Indoor Unit Indoor Unit
Wireless
Controller
A B
Outdoor Unit
Wireless
Controller
A B
Wired
Wireless
SW2
DIP Switch PCB
Setting is NOT required.
Reconnect wirings correctly.
A
C 208/230V
5V
AB
12
L1
N
(Mp)
(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.