Mitsubishi Electric QAHV-N560YA-HPB Service Handbook page 100

[ VII Control ]
Table 1
Primary side circuit flow rate map
Pump output opening/water flow rate
adjust valve opening
Flow rate (pump output opening 16%)
Flow rate (pump output opening 27%)
Flow rate (pump output opening 100%)
(Check result)
Pump output opening/water flow rate
adjust valve opening
Flow rate (pump output opening 16%)
Flow rate (pump output opening 27%)
Flow rate (pump output opening 100%)
4-1 Check the following. (Primary side circuit)
Primary side circuit
↓ Check the checkbox.
□ All places with flow rate valve opening 1000 through 100 are 2 L or above?
If 2 L/min or below, air may not be bled out. Perform an air bleeding operation and water flow rate
adjustment operation again.
□ When there are multiple units, the values of the same pump output opening and the same valve opening
are not greater or less than those for other units by 10% and 2 L/min or more.
(In multiple-unit system, perform a water flow rate adjustment operation at the same time.)
□ All the values (item codes d01 through d09) are not "0" when the pump output opening is 16%. (Not
whole air is bled out.)
Table 2
Secondary side circuit flow rate map
Pump output value 0
Flow rate d55
Pump output value 55
Flow rate d66
(Check result)
Pump output value 0
Flow rate
Pump output value 55
Flow rate
4-2 Check the following. (Secondary side circuit)
↓ Check the checkbox.
□ Is the output at 100% (d75) between 20 ℓ/min and 30 ℓ/min?
If the output is below 20 ℓ/min, water may not flow at a high flow rate during normal operation.
If the output is above 30 ℓ/min, water may not flow at a low flow rate during normal operation.
• Take a measure such as adjusting the frequency using an inverter, etc. so that the output at 100% (d75)
becomes between 20 ℓ/min and 30 ℓ/min.
□ Does a value from 1 ℓ/min to 4 ℓ/min exist for the flow rate at an arbitrary output except 0%?
If there was no value from 1 ℓ/min to 4 ℓ/min for the flow rate when any output except 0%, the flow rate
may not be able to be controlled at a low flow rate.
• Carry out the air bleeding and flow rate adjustment operations again.
• Take a measure such as adjusting the frequency using an inverter, etc. so that a value from 1 ℓ/min to 4 ℓ/min
exists for the flow rate during output.
HWE1517A
Close
<------------------
1600 1400
d01 d02
d10 d11
d19 d20
Close
<------------------
1600 1400
5 10 15
d56 d57 d58
60 65 70
d67 d68 d69
5 10 15
60 65 70
Water flow rate adjust valve opening
1200 1000 800
d03 d04 d05
d12 d13 d14
d21 d22 d23
Water flow rate adjust valve opening
1200 1000 800
20 25 30
d59 d60 d61
75 80 85
d70 d71 d72
20 25 30
75 80 85
- 93 -
Open
------------------>
600 400 200
d06 d07 d08
d15 d16 d17
d24 d25 d26
Open
------------------>
600 400 200
35 40 45
d62 d63 d64
90 95 100
d73 d74 d75
35 40 45
90 95 100
100
d09
d18
d27
100
50
d65
50
GB