Check Codes Displayed On Remote Controller And Smms Series Outdoor Unit (7-Segment Display On I/F Board) And Locations To Be Checked - Toshiba MMD-UP0481HFP-UL Service Manual

10-4. 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 — —
E04 — —
No. of indoor
units from
which signal is
received
normally
E06
E04
— —
Location
Description System status
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-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
- 66 -
Check code detection
Check items (locations)
condition(s)
Communication between • Check remote controller
indoor P.C. board and inter-unit tie cable (A/B).
remote controller is • Check for broken wire or
disrupted. 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.
Signal cannot be transmitted • Check internal
from remote controller to transmission circuit of
indoor unit. remote controller.
--- Replace remote
controller as necessary.
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 (SW100,
Bit 2).
Condition 1 • Check power supply to
All indoor unit initially indoor unit.
communicating normally (Is power turned on?)
fails to return signal for • Check connection of
specified length of time. indoor-outdoor
communication cable.
Condition 2 • Check connection of
Outdoor I / F board communication connectors
SW103, Bit4 : OFF on indoor P.C. board.
(Factory default) • 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).
Condition 1 • Check power supply to
indoor unit.
Indoor unit initially
communicating (Is power turned on?)
normally fails to return • Check indoor-outdoor
signal for specified power-on sequence.
length of time. • Check indoor address
setting
• Check wiring of Indoor-
outdoor communication
wires
• Check outdoor terminator
resistor setting (SW100,
Bit 2).