Toshiba HWS-803XWHM3-E Service Manual page 104

[F08] Error TO sensor failure
Start
TO sensor
connector (CN602) is
connected
TO sensor
resistance characteristic
is normal
Replace water heat exchange control board
[F10] Error TWI sensor failure
Start
TWI sensor
connector (CN205) is
connected
TWI sensor
characteristic is normal
Replace water heat exchange control board
[F11] Error TWO sensor failure
Start
TWO sensor
connector (CN205) is
connected
TWO sensor
characteristic is normal
Replace water heat exchange control board
No
Yes
No
(Refer to Charasteristic table on page 122)
Yes
No
Yes
No
(Refer to Charasteristic table on page 122)
Yes
No
Yes
No
(Refer to Charasteristic table on page 122)
Yes
103
Correct TO sensor
connection
Replace TO sensor
Correct TWI sensor
connection
Replace TWI sensor
Correct TWO sensor
connection
Replace TWO sensor