Troubleshooting - Toshiba RAV-SM454MUT-E Installation Manual

Compact 4-way Cassette Type
11

Troubleshooting

Confirmation and check
When an error occurred in the air conditioner, an error
code and indoor UNIT No. appear on the display part
of the remote controller.
The error code is only displayed during the operation.
If the display disappears, operate the air conditioner
according to the following "Confirmation of error log" for
confirmation.
Error code Indoor UNIT No. in
which an error occurred
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Installation Manual
Confirmation of error log
When an error occurred on the air conditioner, the error
log can be confirmed with the following procedure.
(The error log is stored in memory up to 4 errors.)
The log can be confirmed from both operating status
and stop status.
2
3
1
1
When and buttons are pushed
simultaneously for 4 seconds or more, the
following display appears.
If is displayed, the mode enters in the error log
mode.
• [01: Order of error log] is displayed in CODE
No..
• [Error code] is displayed in CHECK.
• [Indoor unit address in which an error occurred]
is displayed in Unit No..
2
Every pushing of button used to set
temperature, the error log stored in memory
is displayed in order.
The numbers in CODE No. indicate CODE No.
[01] (latest) → [04] (oldest).
REQUIREMENT
Do not push button because all the error log of the
indoor unit will be deleted.
3
After confirmation, push button to return
to the usual display.
Compact 4-way Cassette Type
– 21 –
Error codes and parts to be checked
Wired
Wireless remote controller
remote
Sensor block display of
controller
receiving unit
display
Main defective parts
Operation Timer
Ready
Indication Flashing
GR GR OR
No header remote
controller
E01
Remote controller
communication error
Remote controller
E02
transmission error
Indoor unit-remote
E03 controller regular
communication error
Indoor unit-outdoor
unit serial
communication error
E04
IPDU-CDB
communication error
Duplicated indoor
E08
addresses
Duplicated header
E09
remote controllers
CPU-CPU
E10
communication error
Header unit follower
E18 unit regular
communication error
IPDU communication
E31
error
Indoor unit heat
F01 ALT exchanger sensor
(TCJ) error
Indoor unit heat
F02 ALT exchanger sensor
(TC) error
Outdoor unit
F04 ALT discharge temp.
sensor (TD) error
Outdoor unit temp.
F06 ALT
sensor (TE/TS) error
F07 ALT TL sensor error
Outdoor unit outside
F08 ALT
air temp. sensor error
Indoor unit room
F10 ALT temp. sensor (TA)
error
F12 ALT TS sensor error
Heat sink sensor
F13 ALT
error
Temp. sensor
F15 ALT
connection error
Indoor unit, other P.C.
F29 SIM
board error
Installation Manual
Judging
Parts to be checked / error description
device
Incorrect remote controller setting --- The header
remote controller has not been set (including two
Remote
remote controllers).
controller
No signal can be received from the indoor unit.
Indoor / outdoor connecting wires, indoor P.C. board,
Remote
remote controller
controller
--- No signal can be sent to the indoor unit.
Remote controller, network adapter, indoor P.C.
Indoor board --- No data is received from the remote
controller or network adapter.
Indoor / outdoor connecting wires, indoor P.C. board,
Indoor outdoor P.C. board --- Serial communication error
between indoor unit and outdoor unit
Indoor address setting error --- The same address as
Indoor
the self-address was detected.
Remote controller address setting error --- Two
remote controllers are set as header in the double-
Remote
remote controller control.
controller
(* The header indoor unit stops raising alarm and
follower indoor units continue to operate.)
Indoor P.C. board --- Communication error between
Indoor
main MCU and motor microcomputer MCU
Indoor P.C. board --- Regular communication is not
Indoor possible between header and follower indoor units or
between twin header (main) and follower (sub) units.
Outdoor Communication error between IPDU and CDB
Heat exchanger sensor (TCJ), indoor P.C. board ---
Indoor Open-circuit or short-circuit of the heat exchanger
sensor (TCJ) was detected.
Heat exchanger sensor (TC), indoor P.C. board ---
Indoor Open-circuit or short-circuit of the heat exchanger
sensor (TC) was detected.
Outdoor temp. sensor (TD), outdoor P.C. board ---
Outdoor Open-circuit or short-circuit of the discharge temp.
sensor was detected.
Outdoor temp. sensors (TE/TS), outdoor P.C. board -
Outdoor -- Open-circuit or short-circuit of the heat exchanger
temp. sensor was detected.
TL sensor may be displaced, disconnected or short-
Outdoor
circuited.
Outdoor temp. sensor (TO), outdoor P.C. board ---
Outdoor Open-circuit or short-circuit of the outdoor air temp.
sensor was detected.
Room temp. sensor (TA), indoor P.C. board --- Open-
Indoor circuit or short-circuit of the room temp. sensor (TA)
was detected.
TS sensor may be displaced, disconnected or short-
Outdoor
circuited.
Abnormal temperature was detected by the temp.
Outdoor
sensor of the IGBT heat sink.
Outdoor Temp. sensor (TE/TS) may be connected incorrectly.
Indoor Indoor P.C. board --- EEPROM error
Air
conditioner
status
*
*
Auto-
reset
Auto-
reset
Auto-
reset
*
Auto-
reset
Auto-
reset
Entire
stop
Auto-
reset
Auto-
reset
Entire
stop
Entire
stop
Entire
stop
Operation
continued
Auto-
reset
Entire
stop
Entire
stop
Entire
stop
Auto-
reset
42-EN