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Troubleshooting (Continued)
Check Code Table
Failure mode detected by indoor unit
Judgment and action
Diagnosis function
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.
Check code
E03
E04
E08
L03
L07
L08
L09
L30
P12
P19
P31
F01
F02
F10
F29
E18
Possible causes
No signal reception from remote
controller
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
Duplication of indoor unit address
Duplication of header indoor unit
Group line in individual indoor unit
Indoor unit group address not set
Indoor unit capacity not set
External interlock alarm input
Failure of indoor unit DC fan
Failure of 4-way valve system
• Indoor unit heat exchange
temperature lowers after HEAT
operation starts.
Indoor unit OFF during alarming to
other indoor units
Improper mounting, disconnection
or short-circuit of indoor unit heat
exchange sensor TCJ
Improper mounting, disconnection
or short-circuit of indoor unit heat
exchange sensor TC
Improper mounting, disconnection
or short-circuit of indoor unit room
temp. sensor TA
Failure of indoor unit EEPROM
• EEPROM access error
Communication error between
header and follower indoor units
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
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