Toshiba RAV-SM1100UT-E Service Manual page 54

Operation of diagnostic function
Block Check
display code
[MODE] lamp Error in indoor fan system
5Hz flash
Revolutions frequency error of
fan
Error in indoor unit or other
positions
1. EEPROM access error
Outside error input
Detected by input voltage level
from outside devices
Outside interlock input
Detected by input voltage level
from outside devices
Operation of diagnostic function
Check
Cause of operation
code
Serial return signal is not sent
from No. 1 indoor unit to
remote controller.
• Miscabling of inter-unit cable
between remote controller
and indoor unit
• Miss-setting of indoor unit No.
(Group address)
Error mode detected by indoor unit (1)
Status of air
Cause of operation
conditioner
All stop
Operation
continues
Operation
continues
All stop
Error mode detected by indoor unit (2)
Status of air
conditioner
ON/OFF Displayed when
error is detected
Condition
Displayed when
error is detected
Displayed when
error is detected
Displayed when
error is detected
Displayed when
error is detected
Condition
1. Indoor unit does not completely operate.
• Check inter-unit cable.
• Check indoor P .C. board. (Main/Sub P.C. boards)
• Check remote controller.
2. In normal operation
• Check setting of indoor unit No.
(SW01) (Sub P .C. board)
• Check remote controller.
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Judgment and measures
1. Check indoor fan motor connector
circuit (CN210).
2. Check indoor fan.
3. Check indoor P.C. board (Main P.C.
board).
1. Check indoor P.C. board
(EEPROM and peripheral circuits)
(Main P.C. board).
1. Check outside devices.
2. Check indoor P.C. board (Main P.C.
board).
1. Check outside devices.
2. Check indoor P.C. board (Main P.C.
board).
Judgment and measures