SMC Networks HRS012-A-10 Series - AL08: Circulating Fluid Discharge Pressure Rise

HRX-MM-N007
Chapter 3 Alarm Indication and Troubleshooting
3.3 Troubleshooting HRS Series
3-42
AL08: Circulating fluid discharge pressure rise
<Detection method> This alarm goes off when the pressures detected by the circulating fluid pressure
sensor (for discharge) reach the following values (change in the values acceptable).
- Standard pump: 0.30 MPa
- Option T (High pressure pump): 0.70 MPa
- Option MT (High pressure pump for pure water): 0.60 MPa
Is AL25 being generated?
Y
N
Y
Refer to the section "AL25:
Circulating fluid discharge
pressure sensor failure".
2.
Check for any clogging in the
heat exchanger.
Normal
Error
Is AL06 being generated?
Y
Go to the step "AL06: High
circulating fluid discharge
temp.".
N
Has the value has been
changed from the default?
Y
1.
Check the external piping.
Is the set alarm
value is close to the
external piping?
Remove any causes of the
problems.
Review the set alarm value.
N
Normal
Error
Y
N
Circulating fluid discharge
pressure rise
AL08
3.
Does AL25 go off
when the circulating fluid
pressure sensor connector is
disconnected?
N
Are other alarms being
generated simultaneously?
Y
Check the troubleshooting
that is corresponding to the
alarm number that is being
generated.
4.
Check the circulating
fluid pressure sensor after
it is replaced.
Y
N
Error
Normal
Completion
Replace the main board.
See section "4.5.16
Replacement of main board
& communication board".
The heat exchanger, which is
an evaporator and a part of
the refrigerant circuit, needs
to be replaced. Only a
specialized operator is
allowed to handle the
refrigerant circuit.
See document No. HRX-MM-
Q014 for replacement.