Toshiba HWT-601XWHT6W-E - Page 114

113
[A10] Antifreeze operation (2)
No
Note: Determined at TWO-TWI temperature during operation at a pressure of PS
No
Yes
Yes
Yes
Sufficient refrigerant
Operating with
no load on water
circuit?
Replace flow sensor
Remove waste
Flow sensor is normal
Secure water
circulation amount
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
Recharge refrigerant
No
Replace flow sensor
Raise the set water temperature
Add fan coils
No
Excess air
noise comes from
inside pump
circulation flow
shortage
Flow rate
detected by flow sensor is
almost same as actual
value
Start
No
No
Yes
Yes
Yes
Check water
heat exchange
control board
If defective, replace it
PC board
MCC-1753
MCC-1755