Check Codes Displayed On Remote Controller And Smms Series Outdoor Unit (7-Segment Display On I/F Board) And Locations To Be Checked - Toshiba MMU-UP0051MH-E(TR) Service Manual

9-4. Check Codes Displayed on Remote Controller and SMMS
series 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
Main Outdoor 7-segment display
remote
Check
Sub-code
controller
code
E01 — —
E02 — —
E03 — —
E04 — —
No. of indoor
units from
which signal is
received
normally
E06
E04
— —
Location
Description
of
detection
Remote Indoor-remote Stop of
controller controller corresponding
communication unit
trouble
(detected at
remote
controller end)
Remote Remote Stop of
controller controller corresponding
transmission unit
trouble
Indoor unit Indoor-remote Stop of
controller corresponding
communication unit
trouble
(detected at
indoor end)
Indoor unit Indoor-outdoor Stop of
communication corresponding
circuit trouble unit
(detected at
indoor end)
I/F Dropping out of All stop
indoor unit
Indoor unit Indoor-outdoor Only specified
communication indoor units stop
circuit trouble
– 103 –
Check code detection
System status
condition(s)
Communication between
indoor P.C. board and
remote controller is
disrupted.
Signal cannot be transmitted
from remote controller to
indoor unit.
There is no communication
from remote controller
(including wireless) or
network adaptor.
Indoor unit is not receiving
signal from outdoor unit.
Condition 1
All indoor unit initially
communicating normally
fails to return signal for
specified length of time.
Condition 2
Outdoor I / F board
SW103, Bit4 : OFF
(Factory default)
Condition 1
Indoor unit initially
communicating
normally fails to return
signal for specified
length of time.
Check items (locations)
• Check remote controller
inter-unit tie cable (A/B).
• Check for broken wire or
connector bad contact.
• Check indoor power
supply.
• Check for failure in indoor
P.C. board.
• Check remote controller
address settings
(when two remote
controllers are in use).
• Check remote controller
P.C. board.
• Check internal
transmission circuit of
remote controller.
--- Replace remote
controller as necessary.
• Check remote controller
and network adaptor
wiring.
• Check order in which
power was turned on for
indoor and outdoor units.
• Check indoor address
setting.
• Check indoor-outdoor tie
cable.
• Check outdoor terminator
resistor setting (SW100,
Bit 2).
• Check power supply to
indoor unit.
(Is power turned on?)
• 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 failure in indoor
P.C. board.
• Check for failure in outdoor
P.C. board (I/F).
• Check power supply to
indoor unit.
(Is power turned on?)
• Check indoor-outdoor
power-on sequence.
• Check indoor address
setting
• Check wiring of Indoor-
outdoor communication
wires
• Check outdoor terminator
resistor setting (SW100,
Bit 2).