SMC Networks HRSH150-A*-20 Series, Operation Manual

Page: 150 / 178

HRX-OM-Q026-B
Chapter 6 Alarm indication and trouble shooting
6.3
Troubleshooting HRSH Series
6-6
Table 6-2 Alarm code list and Troubleshooting (2/3)
Code Alarm name
Alarm
operation*1
(Default
setting)
Cause / Remedy
(Press the reset key after eliminating the
cause.)
AL21 DC line fuse cut A.STP
Fuse for the power supply output of the
contact input/output connector has blown.
・ Ask for the service.
・ Check that there is no incorrect wiring and
the current load is within the specified range.
AL22
Circulating fluid
discharge temp. sensor
failure
A.STP
AL23
Circulating fluid return
temp. sensor failure
A.STP
AL24
Compressor suction
temp. sensor failure
P.RUN
Malfunction of the temperature sensor
occurred.
Ask for the service.
AL25
Circulating fluid
discharge pressure
sensor failure
A.STP
Malfunction of the pressure sensor for the
circulating fluid circuit occurred.
EEEE is displayed on the PI display of the
main display and check monitor display.
Ask for the service.
AL26
Compressor discharge
pressure sensor failure
P.RUN
AL27
Compressor suction
pressure sensor failure
P.RUN
Malfunction of the pressure sensor for the
refrigeration circuit occurred.
Ask for the service.
AL28 Pump maintenance OFF
Every
20,000h
AL29 Fan maintenance OFF
Every
30,000h
AL30
Compressor
maintenance
OFF
Notices of the periodical
maintenances.
Ask for the services of the
pump, fan and/or
compressor.
Every
30,000h
AL31
Contact input 1 signal
detection
A.STP
AL32
Contact input 2 signal
detection
A.STP
Contact input is detected.
AL37
Compressor discharge
temp. sensor failure
P.RUN
Malfunction of the temperature sensor
occurred.
Ask for the service.
AL38
Compressor discharge
temp. rise
P.RUN
Check that the ambient and circulating fluid
temperature are within the specified ranges.
AL39
Internal unit fan
stoppage
A.RUN
Malfunction of the internal unit fan occurred.
Ask for the service.
AL40
Dust-proof filter
maintenance
A.RUN
Notice of the periodical
maintenance.
Clean the dust-proof filter.
Every 500h
AL41 Power stoppage A.STP
The power was shut off during running.
Restart after checking the power supply.
AL42 Compressor waiting A.RUN
The system is waiting for the compressor to
be ready to run. Wait for a while.
Will be automatically released after running.