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Check code table
The contents of trouble detected by indoor unit
Operation of diagnostic function
Check
code
E03
E04
E08
L03
L07
L08
L09
L30
P10
P12
P19
P31
F01
F02
F10
F29
E10
E18
Cause of operation
No communication from remote
controller (including wireless) and
communication adapter
The serial signal is not output from
outdoor unit to indoor unit.
• Miss-wiring of inter-unit wire
• Trouble serial sending circuit on
outdoor P.C. board
• Trouble serial receiving circuit on
indoor P.C. board
Duplicated indoor unit address
Duplicated indoor header unit
There is group wire in individual indoor
unit.
Unset indoor group address
Unset indoor capacity
Abnormal input of outside interlock
Float switch operation
• Float circuit, Disconnection,
Coming-off, Float switch contact
trouble
Indoor DC fan trouble
4-way valve system trouble
• After heating operation has started,
indoor heat exchangers temp. is
down.
Unit automatically stops while warning
is output to other indoor units.
Coming-off, disconnection or short of
indoor heat exchanger temp. sensor
(TCJ)
Coming-off, disconnection or short of
indoor heat exchanger temp. sensor
(TC)
Coming-off, disconnection or short of
indoor heat exchanger temp. sensor
(TA)
Indoor EEPROM trouble
• EEPROM access trouble
Communication trouble between indoor
MCU
• Communication trouble between fan
driving MCU and main MCU
Regular communication trouble between
indoor master and follower units and
between main and sub units
Status of
air conditioner
Stop
(Automatic reset)
Stop
(Automatic reset)
Stop
Stop
Stop
Stop
Stop
Stop
(Automatic reset)
Stop
(Follower unit)
(Automatic reset)
Stop
(Automatic reset)
Stop
(Automatic reset)
Stop
(Automatic reset)
Stop
(Automatic reset)
Stop
(Automatic reset)
Stop
(Automatic reset)
Condition
Displayed when
trouble is
detected
Displayed when
trouble is
detected
Displayed when
trouble is
detected
Displayed when
trouble is
detected
Displayed when
trouble is
detected
Displayed when
trouble is
detected
Displayed when
trouble is
detected
Displayed when
trouble is
detected
Displayed when
trouble is
detected
Displayed when
trouble is
detected
Displayed when
trouble is
detected
Displayed when
trouble is
detected
Displayed when
trouble is
detected
Displayed when
trouble is
detected
Displayed when
trouble is
detected
Judgment and measures
1. Check cables of remote controller and communication adapters.
• Remote controller LCD display OFF (Disconnection)
• Central remote controller [97] check code.
1. Outdoor unit does not completely operate.
• Inter-unit wire check, correction of miss-wiring.
• Check outdoor P.C. board. Correct wiring of P.C. board.
2. When outdoor unit normally operates
Check P.C. board (Indoor receiving / Outdoor sending).
1. Check whether remote controller connection (Group/Individual)
was changed or not after power supply turned on
(Finish of group construction/Address check).
* If group construction and address are not normal when the
power has been turned on, the mode automatically shifts to
address setup mode. (Resetting of address)
1. Set indoor capacity (DN=11)
1. Check outside devices.
2. Check indoor P.C. board.
1. Trouble of drain pump
2. Clogging of drain pump
3. Check float switch.
4. Check indoor P.C. board.
1. Position detection trouble
2. Over-current protective circuit of indoor fan driving unit operated.
3. Indoor fan locked.
4. Check indoor P.C. board.
1. Check 4-way valve.
2. Check 2-way valve and check valve.
3. Check indoor heat exchanger (TC/TCJ).
4. Check indoor P.C. board.
1.
2. Chec
Judge follower unit while header unit is [E03], [L03], [L07] or [L08].
k indoor P.C. board.
1. Check indoor heat exchanger temp. sensor (TCJ).
2. Check indoor P.C. board.
1. Check indoor heat exchanger temp. sensor (TC).
2. Check indoor P.C. board.
1. Check indoor heat exchanger temp. sensor (TA).
2. Check indoor P.C. board.
1. Check indoor EEPROM. (including socket insertion)
2. Check indoor P.C. board.
1. Check indoor P.C. board.
1. Check remote controller wiring.
2. Check indoor power supply wiring.
3. Check indoor P.C. board.