Toshiba RAV-SM802UT-E User Manual

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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

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

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 outdoor temperature
sensor (TD)

Coming-off, disconnection or short of outdoor temperature
sensor (TE/TS)

Coming-off, disconnection or short of outdoor temperature
sensor (TO)

Coming-off, disconnection or short of indoor heat exchanger
sensor (TA)

Indoor EEPROM error
• EEPROM access error

Breakdown of compressor
• Displayed when error is detected

Compressor does not rotate.
• Over-current protective circuit operates after specified time

passed when compressor had been activated.

Current detection circuit error
• Current value at AC side is high even during compressor-OFF.
• Phase of power supply is missed.

Duplicated indoor master units

There is group line in individual indoor units.

Unsetting of indoor group address

Stop

(Automatic reset)

S top

(Automatic reset)

Stop

Stop

(Automatic reset)

Stop

(Automatic reset)

Stop

(Automatic reset)

Stop

(Automatic reset)

Stop

Stop

Operation

continues.

Stop

(Automatic reset)

Stop

(Automatic reset)

Stop

Stop

Stop

Stop

Stop

Stop

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

Displayed when

error is detected

Displayed when

error is detected

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. 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.

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 outdoor temperature sensor (TD).
2. Check outdoor CDB P.C. board.

1. Check outdoor temperature sensor (TE/TS).
2. Check outdoor CDB P.C. board.

1. Check outdoor temperature sensor (TO).
2. Check outdoor CDB 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 power voltage.  AC200V ±20V
2. Overload operation of refrigerating cycle
3. Check current detection circuit at AC side.

1. Trouble of compressor (Compressor lock, etc.) : Replace compressor.
2. Defective cabling of compressor (Phase missing)
3. Phase-missing operation of power supply (3-phase model)

1. Compressor immediately stops even if restarted. : Check IPDU.
2. Phase-missing operation of power supply

Check 3-phase power voltage and cables.

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)