Service Manual

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Error mode 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.
• Miswiring of inter-unit wire
• Defective serial sending circuit on
outdoor P.C. board
• Defective serial receiving circuit on
indoor P.C. board
Duplicated indoor unit address
Duplicated indoor master 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 error
Indoor DC fan error
4-way valve system error
• After heating operation has started,
indoor heat exchangers temp. is
down.
Own unit 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 error
• EEPROM access error
Communication error between indoor
MCU
• Communication error between fan
driving MCU and main MCU
Regular communication error between
indoor aster 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
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.
• 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 miswiring
• 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 (CODE No. (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 error
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. Judge follower unit while header unit is [E03], [L03], [L07] or [L08].
2. Check 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.