Check Codes Displayed On Remote Controller And Smms Outdoor Unit (7-Segment Display On I/F Board) And Locations To Be Checked - Toshiba MMF-AP0156H-E (TR) 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
Outdoor 7-segment display
Main
remote
Check
controller
Sub-code
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 — —
01:
Indoor-outdoor
communication
02:
E12 E12 Outdooroutdoor
communication
E15 E15 —
Location
of
Description
detection
Remote Indoor-remote Stop of
controller controller corresponding unit
communication
error
(detected at
remote
controller end)
Remote Remote controller Stop of
controller transmission error corresponding unit
Indoor unit Indoor-remote Stop of
controller corresponding unit
communication
error
(detected at
indoor end)
Indoor unit Indoor-outdoor Stop of
communication corresponding unit
circuit error
(detected at
indoor end)
I/F Dropping out of All stop
indoor unit
I/F Indoor-outdoor All stop
communication
circuit error
(detected at
outdoor end)
Indoor unit Duplicated indoor All stop
I/F address
Remote Duplicated master Stop of
controller remote controller corresponding unit
Indoor unit Indoor inter-MCU Stop of
communication corresponding unit
error
I/F Automatic address All stop
starting error
I/F Indoor unit not All stop
found during
automatic
address setting
Error 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.
Indoor unit initially
communicating normally fails
to return signal for specified
length of time.
Signal cannot be transmitted
from outdoor to indoor units
for 30 seconds continuously.
More than one indoor unit is
assigned same address.
In two remote controller
configuration (including
wireless), both controllers are
set up as master. (Header
indoor unit is shut down with
alarm, while follower indoor
units continue operating.)
Communication cannot be
established / maintained upon
turning on of power or during
communication.
• Indoor automatic address
setting is started while
automatic address setting
for equipment in other
refrigerant line is in progress.
• Outdoor automatic address
setting is started while
automatic address setting
for indoor units is in progress.
Indoor unit cannot be detected
after indoor automatic address
setting is started.
– 63 –
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.
• Perform automatic address setting
again after disconnecting
communication cable to that
refrigerant line.
• Check connection of indoor-outdoor
communication line.
• Check for error in indoor power
supply system.
• Check for noise from other devices.
• Check for power failure.
• Check for defect in indoor P.C. board.