HRX-MM-N007
Chapter 3 Alarm Indication and Troubleshooting
HRS Series
3.3 Troubleshooting
3-37
AL07: Abnormal pump operation
<Detection method> This alarm goes off when the pressures detected by the circulating fluid pressure
sensor (for discharge) is 0.05 MPa or less.
Pump operation failure
AL07
Is AL25 being generated?
Y
N
Y
4.
A small amount of circulating
fluid flows.
Error
Does it have a high
pressure pump?.
5.
Check the main board.
Normal
Completion
Refer to the section
"AL25: Circulating fluid
discharge pressure
sensor failure".
Is ethylene glycol
solution used for circulating
fluid?
1.
Check the power supply
voltage.
N
Is density of the ethylene
glycol aqueous solution
15%.?
Y
Replace the circulating fluid
with new fluid.
N
Supply the correct
power.
2.
Check the pump rotation
manually.
Y
N
Error
Normal
3.
Check the pump
performance.
6.
Check the power board.
Error
Normal
7.
Check the circulating fluid
pressure sensor.
Normal
8.
Check the circulating fluid
pressure sensor after it is
replaced.
Error
Error
Error
Normal
N
Y
Replace the main board.
See section "4.5.16
Replacement of main board
& communication board".
Error
Normal
Normal
Replace the pump.
See section "4.5.3
Replacement of pump (For
standard pump)", and section
"4.5.4 Replacement of high
pressure pump".
Replace the pump.
See section"4.5.4
Replacement of high
pressure pump" for
replacement.
Replace the main board.
See section "4.5.16
Replacement of main board
& communication board".
Replace the power board.
See section "4.5.17
Replacement of power
board".
