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Toshiba
[A11] Error Release protection operation
Replace flow switch
Remove waste
Flow switch is normal
Secure water
circulation amount
Circulation flow
shortage
Waste stuck inside
water circuit
12 M or longer water
pipe to a branch,
or 5 or less branches
Remove sufficiently
excess air
Place buffer tank and
the second pump
No
Excess air
noise comes from
inside pump
Chattering
noise comes from
flow switch
Start
No
No
Yes
Attach TWI sensor
No
TWI sensor is
attached to pipe
Yes
Replace TWI or TWO sensor
No
TWI and TWO
sensor characteristics
are normal
Yes
Yes
Yes
Replace water heat
exchange control board
+00A09-002_01EN_SVM_ALL_Air_to_Water.book Page 82 Monday, October 5, 2009 2:09 PM