Toshiba HWT-601XWHT6W-E - Page 109

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[A03] Temperature increase error (hot water supply)
Replace TTW sensor
No
(TTW ≥ 85°C is detected)
TTW sensor
characteristic is correct
Yes
No
Hot water cylinder heater
is energized
Yes
No
At normal
temperature, tank thermostat
is energized
Yes
Replace hot water
cylinder thermostat
No
Hot water cylinder
thermostat operates
Yes
Operation
temperature 82°C
Start
Check water heat exchange control board
If defective, replace it
PC board
MCC-1753
MCC-1755