Check Codes Displayed On Remote Control And Smms Outdoor Unit (7-Segment Display On I/F Board) And Locations To Be Checked - Toshiba MMD-AP0721HP-UL1 Service Manual

9-4.
Check Codes Displayed on Remote Control and
SMMS-e 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
Outdoor 7-segment display
Main
remote
Check
Sub-code
control
code
E01 – –
E02 – –
E03 – –
E04 – –
No. of indoor units from
which signal is received
normally
E06 E06
– E07 –
Location
of Description System status
detection
Remote Indoor-remote Stop of
control control corresponding
communication unit
trouble
(detected at
remote
control end)
Remote Remote Stop of
control control corresponding
transmission unit
trouble
Indoor Indoor-remote Stop of
unit control corresponding
communication unit
trouble
(detected at
indoor end)
Indoor Indoor-outdoor Stop of
unit communication corresponding
circuit trouble
unit
(detected at
indoor end)
Signal lack of
I/F All stop
indoor unit
I/F Indoor-outdoor All stop
communication
circuit trouble
(detected at
outdoor end)
- 59 -
Trouble detection
Check items (locations)
condition(s)
Communication between • Check remote control
indoor P.C. board and inter-unit tie cable (A/B).
remote control is disrupted. • Check for broken wire or
connector bad contact.
• Check indoor power
supply.
• Check for defect in indoor
P.C. board.
• Check remote control
address settings
(when two remote control
are in use).
• Check remote control
P.C. board.
Signal cannot be • Check internal
transmitted from remote transmission circuit of
control to indoor unit. remote control.
--- Replace remote
control as necessary.
There is no communication • Check remote control
from remote control
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 terminator
resistor 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).
• Check outdoor terminator
Signal cannot be transmitted
resistor setting (SW30,
from outdoor to indoor units
for 30 seconds continuously. Bit 2).
• Check connection of
indoor-outdoor
communication circuit.