Toshiba MD-VNK802HEXE Service Manual page 61

Check code
7-segment display of
Local outdoor unit
remote
controller Check
Sub code
code
01:
Central control
02:
Communications
E12 E12
between outdoor
units
E15 E15 –
00:
Over capacity
01 ~:
Number of
connected units
E16 E16
E18 – –
00:
No center unit
02:
Multiple center
E19 E19
units
01:
Outdoor
connections of
another line
E20 E20
02:
Indoor
connections of
another line
E23 E23 –
E25 E25 –
Outdoor address
with reception
error
E26 E26
Location
Check code
of System status
name
detection
I/F Automatic All stopped
address start
error
I/F No indoor unit All stopped
during
automatic
address
I/F Number of All stopped
connected units
/ Capacity
exceeded
Indoor Indoor header - Only the target
follower unit stopped
communication
error
I/F Unusual All stopped
number of
center outdoor
units
I/F Connections of All stopped
another line
during
automatic
address
I/F Transmission All stopped
error between
outdoor units
I/F Duplicate All stopped
terminal outdoor
address settings
I/F Number of All stopped
connected
outdoor units
decreasing
Error detection conditions
• The automatic indoor address
start setting has been configured
during automatic address setting
of another refrigerant line device.
• The automatic outdoor address
start setting has been configured
during indoor automatic address
setting.
The indoor unit cannot be detected
when the automatic indoor address
start setting is configured.
• The total capacity of the indoor
unit has exceeded 135 % of the
total capacity of the outdoor unit.
Note:
If this code appears after
configuring the backup setting for
outdoor unit failure, configure the
setting for "Over capacity" not
detected".
<"Over capacity" not detected>
Turn on [SW09 / Bit 2] on the center
outdoor I/F board.
• More than 48 indoor units have
been connected.
Regular communication is not
possible between the header and
follower indoor units.
• There are multiple center outdoor
units in a line.
• There are no center outdoor units
in a line.
Another line device is connected
when the automatic indoor address
start setting is configured.
No signal can be sent from another
outdoor unit for 30 seconds or
longer.
More than one outdoor unit are
assigned to the same outdoor
address manual setting.
Signals are not returned for a given
time from the outdoor unit.
59
Items to check (locations)
Set the address again after
disconnecting communications with
another refrigerant line.
• Check the connection of the
communication line between
indoor and outdoor.
• Check the indoor power line error.
• Check the peripheral noise.
• Check the blackout.
• Check the indoor PC board error.
• Check capacity of indoor unit
connection.
• Check capacity of indoor unit
horse power.
• Check outdoor unit horse power
setting.
• Check number of connected
indoor units.
• Check the outdoor PC board (I/F)
error.
• Check remote controller wiring.
• Check indoor power wiring.
• Check the indoor PC board.
The center outdoor unit is
connected to the indoor - outdoor
wiring (U1, U2).
• Check the connection of the
communication line between
indoor and outdoor.
• Check the outdoor PC board (I/F)
error.
Perform the automatic address
setting procedure of "Address
settings" to cut the line wires.
• Check outdoor unit power.
(Whether powered on)
• Check wire connection between
outdoor units.
• Check the connector connection
for outdoor PC board
communications.
• Check the outdoor PC board (I/F)
error.
• Check terminal resistance
settings of communications
between outdoor units.
Note:
Do not set the outdoor address
manually.
• While setting the outdoor backup.
• Check outdoor unit power.
(Whether powered on)
• Check wire connection between
outdoor units.
• Check the connector connection
for outdoor PC board
communications.
• Check the outdoor PC board (I/F)
error.