Toshiba MMY-MAP0806HT7(J)P, Service Manual, Page: 194 / 350

Sub-code: 00: No header unit 02:
T
wo or more header units
No
Ye
s
Ye
s
No
[E19] [E20]
Sub-code: 01: Connection of an outdoor unit in another line 02: Connection of an indoor unit in another line
No Ye
s
No
No Ye
s
Ye
s
Ye
s
No
No
Ye
s
No
Ye
s
[E23]
e
s
u
a
C
e
d
o
c
k
c
e
h
C
Check code name
e
s
u
a
C
e
d
o
c
k
c
e
h
C
Check code name
e
s
u
a
C
e
d
o
c
k
c
e
h
C
Check code name
Header outdoor unit quantity error
1.
Misconnection of inter-unit wire between indoor and outdoor
2.
Outdoor I/F P
.C. board error
Communication signal sending error between outdoor units
1.
Inter-unit wire connection error between outdoor units
2.
Communication connector connection error between outdoor units, I/F P
.C. board error
3.
End terminal resistance setup error between outdoor units
Unit connected to other line during automatic address
When starting automatic indoor address, a device in another line is connected.
Are not
communication lines
(U1, U2) between indoor
and outdoor connected
to multiple outdoor
units?
Is
communication
line between indoor and
outdoor connected to
one unit per 1
system?
Is connection
of CN03 connector on outdoor I/F P
.C. board
normal?
Is not main power of
outdoor unit turned
of
f?
Did power failure
occur?
Is there no noise
source, etc?
Is the
terminator resistor
between
outdoor units turned on?
(SW30 Bit
2
)
Is there no
miswiring or disconnection
on communication line
between outdoor
units?
Connect communication line between indoor and outdoor to one unit per 1 system.
Correct communication line. Correct wiring or connector
.
T
urn on main power of
outdoor unit. Turn the
terminator resistor
to ON. Clear check code. Check and eliminate noise, etc
Check outdoor I/F P
.C. board.
Defect
Replace
Connect communication line between indoor and outdoor
.
Reference) The outdoor unit connected with communication wires (U1, U2) between indoor and outdoor is automatically recognized as the header unit.
Check I/F board.
Separate the connection between the lines following the address setup method.
− 1 9 3 −