Check Codes Displayed On Remote Controller And Outdoor Unit (7-Segment Display On I/F Board) And Locations To Be Checked - Toshiba MCY-MHP0305HT-C Service Manual

9-4. Check codes displayed on remote controller and
outdoor unit (7-segment display on I/F board) and
locations to be checked
For other types of outdoor units, refer to their own service manuals.
Check code
Location
Outdoor 7-segment display
Main
remote detection
Check
Sub-code
controller
code
Remote
controller
E01 – –
Remote
controller
E02 – –
Indoor
unit
E03 – –
Indoor
unit
E04 – –
No. of indoor I/F
units from
which signal is
received
normally
E06 E06
I/F
– E07 –
Duplicated Indoor
indoor address unit
I/F
E08 E08
of Description System status
Indoor-remote Stop of
controller corresponding
communication unit
error
(detected at
remote
controller end)
Remote Stop of
controller corresponding
transmission unit
error
Indoor-remote Stop of
controller corresponding
communication unit
error
(detected at
indoor end)
Indoor-outdoor Stop of
communication corresponding
circuit error unit
(detected at
indoor end)
Dropping out of All stop
indoor unit
Indoor-outdoor All stop
communication
circuit error
(detected at
outdoor end)
Duplicated All stop
indoor address
95
118
Error detection
Check items (locations)
condition(s)
Communication between • Check remote controller
indoor P.C. board and remote inter-unit tie cable (A / B).
controller is disrupted. • Check for broken wire or
connector bad contact.
• Check indoor power
supply.
• Check for defect in indoor
P.C. board.
• Check remote controller
address settings
(when two remote
controllers are in use).
• Check remote controller
P.C. board.
Signal cannot be transmitted • Check internal
from remote controller to transmission circuit of
indoor unit. remote controller.
--- Replace remote
controller as necessary.
There is no communication • Check remote controller
from remote controller and network adaptor
(including wireless) or wiring.
network adaptor.
Indoor unit is not receiving • Check order in which
signal from outdoor unit. power was turned on for
indoor and outdoor units.
• Check indoor address
setting.
• Check indoor-outdoor tie
cable.
• Check outdoor termination
resistance setting (SW30,
Bit 2).
Indoor unit initially • Check power supply to
communicating normally fails indoor unit.
to return signal for specified (Is power turned on?)
length of time. • Check connection of
indoor-outdoor
communication cable.
• Check connection of
communication connectors
on indoor P.C. board.
• Check connection of
communication connectors
on outdoor P.C. board.
• Check for defect in indoor
P.C. board.
• Check for defect in outdoor
P.C. board (I/F).
Signal cannot be transmitted • Check outdoor termination
from outdoor to indoor units resistance setting (SW30,
for 30 seconds continuously. Bit 2).
• Check connection of
indoor-outdoor
communication circuit.
More than one indoor unit is • Check indoor addresses.
assigned same address. • Check for any change
made to remote controller
connection (group /
individual) since indoor
address setting.