SMC Networks HRSH090 Series, Operation Manual

Page: 156 / 194

HRX-OM-R026
Chapter 7 Alarm indication and trouble shooting
7.3 Troubleshooting HRSH Series
7-6
Table 7-2 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.)
AL19 Communication error OFF
No request message is sent from the host
computer. Send it again.
AL20 Memory error A.STP
Malfunction of the controller occurred.
Ask for the service.
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
Malfunction of the temperature sensor occurred.
Ask for the service.
AL23
Circulating fluid return
temp. sensor failure
A.STP
AL24
Compressor suction temp.
sensor failure
P.RUN
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
Malfunction of the pressure sensor for the
refrigeration circuit occurred.
Ask for the service.
AL27
Compressor suction
pressure sensor failure
P.RUN
AL28 Pump maintenance OFF
Notices of the periodical
maintenances.
Ask for the services of the
pump, fan and/or compressor.
Every 8,000h

5
AL29

2 Fan maintenance
OFF Every 30,000h
AL30 Compressor maintenance OFF Every 30,000h
AL31
Contact input 1 signal
detection
A.STP
Contact input is detected.
AL32
Contact input 2 signal
detection
A.STP
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 temperature, facility
water specifications and heat load are within the
specified ranges.
AL39 Internal unit fan stoppage A.RUN
Malfunction of the internal unit fan occurred.
Ask for the service.

5: Notice on mechanical seal replacement.
Mechanical seal replacement is limited to 2 times.
If the cumulative operation time of the pump exceeds 20,000 hours, please consider requesting pump
inspection service.