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10-2. Check Code List
Error mode detected by indoor unit
: Flash, : Go on, : Go off
Wireless sensor
lamp display
Operation
Timer Ready
Wired remote
controller
Check code
E03
E04
E08
L03
L07
L08
L09
L30
P01
P10
P12
P19
P31
F01
F02
F10
F29
E10
E18
Diagnostic function
Cause of operation
No communication from remote controller (including wireless)
and communication adapters
The serial signal is not output from outdoor unit to indoor unit.
• Miscabling of inter-unit cables
• Defective serial sensing circuit on outdoor P.C. board
• Defective serial receiving circuit on indoor P.C. board
Duplicated indoor unit addresses
Duplicated indoor master units
There is group line in individual indoor units.
Unsetting of indoor group address
Unset indoor capacity
Abnormal outside interlock input
Fan motor thermal protection
Float switch operation
• Disconnection, coming-off, defective float switch contactor
of float circuit
Indoor DC fan error
Error in 4-way valve system
• Indoor heat exchanger temperature lowered after start of
heating operation.
Own unit stops while warning is output to other indoor units.
Coming-off, disconnection or short of indoor heat exchanger
sensor (TCJ)
Coming-off, disconnection or short of indoor heat exchanger
sensor (TC)
Coming-off, disconnection or short of indoor heat exchanger
sensor (TA)
Indoor EEPROM error
• EEPROM access error
Communication error between indoor MCU
• Communication error between fan driving MCU and main
MCU
Regular communication error between master and sub indoor
units or between main and sub indoor units
Status of air
conditioner
Stop
(Automatic reset)
S top
(Automatic reset)
Stop
Stop
Stop
Stop
Stop
Stop
Stop
(Automatic reset)
Stop (Sub unit)
(Automatic reset)
Stop
(Automatic reset)
Stop
(Automatic reset)
Stop
(Automatic reset)
Stop
(Automatic reset)
Stop
(Automatic reset)
Stop
(Automatic reset)
Condition
Displayed when
error is detected
Displayed when
error is detected
Displayed when
error is detected
Displayed when
error is detected
Displayed when
error is detected
Displayed when
error is detected
Displayed when
error is detected
Displayed when
error is detected
Displayed when
error is detected
Displayed when
error is detected
Displayed when
error is detected
Displayed when
error is detected
Displayed when
error is detected
Displayed when
error is detected
Displayed when
error is detected
Displayed when
error is detected
Judgment and measures
1. Check cables of remote controller and communication adapters.
• Handy remote controller LCD display OFF (Disconnection)
• Central remote controller [97] check code
1. Outdoor unit does not completely operate.
• Inter-unit cable check, correction of miscabling, case thermo operation
• Outdoor P.C. board check, P.C. board cables check
2. In normal operation
P.C. board (Indoor receiving/Outdoor sending) check
1. Check whether there is modification of remote controller connection (Group/
Individual) or not after power has been turned on (finish of group configuration/
address check).
* If group configuration 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 the indoor capacity. (DN=I1)
1. Check outside devices.
2. Check indoor P.C. board.
1. Check thermal relay of fan motor.
2. Check indoor P.C. board.
1. Defect of drain pump
2. Clogging of drain pump
3. Check float switch.
4. Check indoor P.C. board.
1. Defective detection of position
2. Over-current protective circuit of indoor fan driving unit operates.
3. Lock of indoor fan
4. Check indoor P.C. board.
1. Check 4-way valve.
2. Check indoor heat exchanger (TC/TCJ) sensor.
3. Check indoor P.C. board.
1. Judge sub unit while master unit is in [E03], [L03], [L07], [L08].
2. Check indoor P.C. board.
1. Check indoor heat exchanger temperature sensor (TCJ).
2. Check indoor P.C. board.
1. Check indoor heat exchanger temperature sensor (TC).
2. Check indoor P.C. board.
1. Check indoor heat exchanger temperature sensor (TA).
2. Check indoor P.C. board.
1. Check indoor EEPROM. (including socket insertion)
2. Check indoor P.C. board.
1. Check cables of remote controller.
2. Check power cables of indoor unit.
3. Check indoor P.C. board.
1. Check cables of remote controller.
2. Check indoor power cable.
3. Check indoor P.C. board.