Toshiba RAV-RM301SDT-E Service Manual page 50

Trouble mode detected by indoor unit
Operation of diagnostic function
Check
Cause of operation
code
No communication from remote
E03 controller (including wireless) and
communication adapter
The serial signal is not output from
outdoor unit to indoor unit.
• Miswiring of inter-unit wire
E04
• Defective serial sending circuit on
outdoor P .C. board
• Defective serial receiving circuit on
indoor P .C. board
E08 Duplicated indoor unit address
L03 Duplicated indoor header unit
There is group wire in individual indoor
L07
unit.
L08 Unset indoor group address
L09
Unset indoor capacity
L30 Abnormal input of outside interlock
Float switch operation
P10
• Float circuit, Disconnection,
Coming-off, Float switch contact trouble
P12 Indoor DC fan trouble
4-way valve system trouble
P19 • After heating operation has started,
indoor heat exchangers temp. is
down.
Own unit stops while warning is output
P31
to other indoor units.
Coming-off, disconnection or short of
F01
indoor heat exchanger temp. sensor
(TCJ)
Coming-off, disconnection or short of
F02
indoor heat exchanger temp. sensor
(TC)
Coming-off, disconnection or short of
F10 indoor heat exchanger temp. sensor
(TA)
Indoor EEPROM trouble
F29
• EEPROM access trouble
Regular communication trouble between
indoor aster and follower units and
E18
between main and sub units
Status of
Condition
air conditioner
Displayed when
Stop
trouble is
(Automatic reset)
detected
Displayed when
Stop
trouble is
(Automatic reset)
detected
Displayed when
trouble is
Stop
detected
Displayed when
trouble is
Stop
detected
Displayed when
Stop trouble is
detected
Displayed when
trouble is
Stop
detected
Displayed when
Stop trouble is
detected
Displayed when
Stop
trouble is
(Automatic reset)
detected
Displayed when
Stop
trouble is
(Follower unit)
detected
(Automatic reset)
Displayed when
Stop
trouble is
(Automatic reset)
detected
Displayed when
Stop
trouble is
(Automatic reset)
detected
Displayed when
Stop
trouble is
(Automatic reset)
detected
Displayed when
Stop
trouble is
(Automatic reset)
detected
Displayed when
Stop
trouble is
(Automatic reset)
detected
– 50 –
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 (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. Check fan motor (Protective circuit operation).
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 remote controller wiring.
2. Check indoor power supply wiring.
3. Check indoor P .C. board.