HRX-MM-N007
Chapter 3 Alarm Indication and Troubleshooting
3.3 Troubleshooting
HRS Series
3-56
AL13: High compressor discharge pressure [For air-cooled type]
<Detection method> This alarm goes off when the pressure detected by the refrigerant circuit pressure
sensor (for high pressure) is 2.6 MPa (Option G: 2.8 MPa) or more.
1.
Is the ambient
temperature out of the
operating range?
4.
Is dustproof filter dusty?
2.
Is external load out of the
specification range?
3.
Is there enough
ventilation space?
This system cannot be used.
Y
Y
Y
N
N
N
Y
This system cannot be used.
Clean the dustproof filter.
8.
Is flow rate of the circulating
fluid less than 5 L/min?
9.
Check the pump
performance.
Y
N
Secure enough maintenance
space specified in the
Operation Manual.
Improve the environment of
installation space.
Connect a by-pass piping.
Normal
Error
10.
Check the pressure sensor in
the refrigerant circuit.
11.
After stopping the power
supply, does the same alarm go
off again when the chiller
is restarted?
N
Please contact SMC or a
distributor.
Electronic expansion valve,
which is 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-
Q016 for replacement.
N
Y
To the next page
Normal
Error
High compressor discharge pressure
[For air-cooled type]
AL13
Are other alarms being
generated simultaneously?
Y
Check the troubleshooting
that is corresponding to the
alarm number that is being
generated.
5.
Check the rotation of the fan.
Replace the fan motor with a
new one.
See section "4.5.6
Replacement of fan".
6.
Check the power board.
7.
Check the power board after
replacement.
N
Normal
Error
Error
Normal
Normal
Error
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 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".
