Check Codes Displayed On Remote Controller And Smms Outdoor Unit (7-Segment Display On I/F Board) And Locations To Be Checked - Toshiba MMW-AP0271LQ-E Service Manual

8-4. Check codes displayed on remote controller and SMMS 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 E06
— E07 —
Duplicated
indoor address
E08 E08
E09 — —
E10 — —
Location
Description
of
detection
Remote Indoor-remote
controller controller
communication
error
(detected at
remote
controller end)
Remote Remote
controller controller
transmission
error
Indoor unit Indoor-remote
controller
communication
error
(detected at
indoor end)
Indoor unit Indoor-outdoor
communication
circuit error
(detected at
indoor end)
I/F Dropping out of
indoor unit
I/F Indoor-outdoor
communication
circuit error
(detected at
outdoor end)
Indoor unit Duplicated
I/F indoor address
Remote Duplicated
controller master remote
controller
Indoor unit Indoor inter-
MCU
communication
error
IPDU: Intelligent Power Drive Unit (Inverter P.C. board)
Indoor unit (including Hot Water Module)
Error detection
System status
condition(s)
Stop of Communication between
corresponding indoor P.C. board and
unit remote controller is disrupted.
Stop of Signal cannot be transmitted
corresponding unit from remote controller to
indoor unit.
Stop of There is no communication
corresponding unit from remote controller
(including wireless) or
network adaptor.
Stop of Indoor unit is not receiving
corresponding unit signal from outdoor unit.
All stop Indoor unit initially
communicating normally fails
to return signal for specified
length of time.
All stop Signal cannot be transmitted
from outdoor to indoor units
for 30 seconds continuously.
All stop More than one indoor unit is
assigned same address.
Stop of In two remote controller
corresponding unit configuration (including
wireless), both controllers
are set up as master.
(Header indoor unit is shut
down with alarm, while
follower indoor units
continue operating.)
Stop of Communication cannot be
corresponding unit established / maintained
upon turning on of power or
during communication.
– 46 –
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 defect 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 termination
resistance setting (SW30,
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 defect in indoor
P.C. board.
• Check for defect in outdoor
P.C. board (I/F).
• Check outdoor termination
resistance setting (SW30,
Bit 2).
• Check connection of
indoor-outdoor
communication circuit.
• Check indoor addresses.
• Check for any change
made to remote controller
connection (group /
individual) since indoor
address setting.
• Check remote controller
settings.
• Check remote controller
P.C. boards.
• Check for defect in indoor
P.C. board