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Toshiba
[A03] Error Temperature rise and error short circuit
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
Replace water heat exchange control board
Replace Mg-sw
No
Mg-sw (RY05) for
heater operates
Yes
Operating noise at normal time
+00A09-002_01EN_SVM_ALL_Air_to_Water.book Page 76 Monday, October 5, 2009 2:09 PM