Toshiba HWS-803XWHM3-E Service Manual page 103

[F04] Error TD sensor failure
Start
TD sensor
connector (CN603) is
connected
TD sensor
resistance characteristic
is normal
Replace water heat exchange control board
[F06] Error TE sensor failure
Start
TE sensor
connector (CN601) is
connected
TE sensor
resistance characteristic
is normal
Replace water heat exchange control board
[F07] Error TL sensor failure
Start
TL sensor
connector (CN604) is
connected
TL sensor
resistance characteristic
is normal
Replace water heat exchange control board
No
Yes
No
Yes
No
Yes
No
Yes
No
Yes
No
(Refer to Charasteristic table on page 122)
Yes
102
Correct TD sensor
connection
Replace TD sensor
Correct TE sensor
connection
Replace TE sensor
Correct TL sensor
connection
Replace TL sensor