Toshiba HWS-802XWHT6-E F20 Error TFI detach failure, F23 Error Lo pressure sensor detach failure

[F20] Error TFI detach failure

Start

TFI sensor	No
is attached to pipe
Yes
TFI sensor	No
characteristic is normal	(See characteristic table on page 101)
Yes
TWI sensor	No
characteristic is normal	(See characteristic table on page 101)
Yes
TWO sensor	No
characteristic is normal	(See characteristic table on page 101)

Yes

Replace water heat exchange control board

[F23] Error Lo pressure sensor detach failure

Start

Attach TFI sensor to pipe

Replace TFI sensor

Replace TWI sensor

Replace TWO sensor

Lo pressure sensor	Yes
is detached (CN207, 212)
No
When operation	No
is stopped, lo pressure sensor
is normal *1
Yes

Replace water heat exchange control board

*1 How to determine: When operation is stopped

Attach lo pressure sensor

Replace lo pressure sensor

89