Failure Mode Detected By Indoor Unit - Toshiba RAV-SM562KRT-E Service Manual

Troubleshooting (Continued)
Check Code Table

Failure mode detected by indoor unit

Check code Possible causes
E03 No signal reception from remote
controller
E04 Serial signal from outdoor unit does
not reach indoor unit.
• Wrong wire connection
• Failure of outdoor unit serial
transmitter
• Failure of indoor unit serial
receiver
E08 Duplication of indoor unit address
L03 Duplication of header indoor unit
L07 Group line in individual indoor unit
L08 Indoor unit group address not set
L09 Indoor unit capacity not set
L30 External interlock alarm input
P12 Failure of indoor unit DC fan
P19 Failure of 4-way valve system
• Indoor unit heat exchange
temperature lowers after HEAT
operation starts.
Indoor unit OFF during alarming to
P31
other indoor units
F01 Improper mounting, disconnection
or short-circuit of indoor unit heat
exchange sensor TCJ
F02 Improper mounting, disconnection
or short-circuit of indoor unit heat
exchange sensor TC
F10 Improper mounting, disconnection
or short-circuit of indoor unit room
temp. sensor TA
F29 Failure of indoor unit EEPROM
• EEPROM access error
E18 Communication error between
header and follower indoor units
Diagnosis function
Air conditioner status
OFF
(auto reset)
OFF
(auto reset)
OFF
OFF
OFF
OFF
OFF
(auto reset)
OFF
(follower units)
(auto reset)
OFF
(auto reset)
OFF
(auto reset)
OFF
(auto reset)
OFF
(auto reset)
OFF
(auto reset)
Conditions
Indicated when an
error is detected
Indicated when an
error is detected
Indicated when an
error is detected
Indicated when an
error is detected
Indicated when an
error is detected
Indicated when an
error is detected
Indicated when an
error is detected
Indicated when an
error is detected
Indicated when an
error is detected
Indicated when an
error is detected
Indicated when an
error is detected
Indicated when an
error is detected
Indicated when an
error is detected
– –
33
Judgment and action
1. Check remote controller wiring.
• No indication on remote controller
LCD (disconnection)
• Central controller [C06] check code
1. When outdoor unit does not work at all
• Check wires, correct wrong
connection.
• Check outdoor unit boards and wiring.
2. When outdoor unit works normally
Check boards (indoor unit receiver,
outdoor unit transmitter)
1. Check remote controller connection
(group/individual) change after
power on.
* If group configuration or address is
not correct, the unit enters auto
address setting mode automatically
for address re-setting.
1. Set indoor unit capacity (DN=11)
1. Check external devices.
2. Check indoor unit boards.
1. Position detect error
2. Overcurrent protection circuit
operation of indoor unit fan driver
3. Indoor unit fan lock
4. Check indoor unit boards.
1. Check 4-way valve.
2. Check 2-way valve/check valve.
3. Check indoor unit heat exchanger (TC/TCJ).
4. Check indoor unit boards.
1. Judging follower unit when header
unit is E03, L03, L07 or L08
2. Check indoor unit boards.
1. Check TCJ.
2. Check indoor unit boards.
1. Check TC.
2. Check indoor unit boards.
1. Check TA.
2. Check indoor unit boards.
1. Check indoor unit EEPROM and
insertion into socket.
2. Check indoor unit boards.
1. Check remote controller wiring.
2. Check indoor unit power wiring.
3. Check indoor unit boards.