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

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HRX-OM-Q026-B
Chapter 6 Alarm indication and trouble shooting
HRSH Series
6.3
Troubleshooting
6-5
Table 6-1 Alarm code list and Troubleshooting (1/3)
Code Alarm name
Alarm
operation
(default
setting)
Cause / Remedy
(Press the reset key after eliminating the
cause.)
AL01 Low level in tank A.STP
The fluid level of the level indicator has fallen.
Fill the circulating fluid.
AL02
High circulating fluid
discharge temp.
A.STP
AL03
Circulating fluid
discharge temp. rise
A.RUN
・
Check that the ambient and circulating fluid
temperature are within the specified ranges.
・
Wait until the circulating fluid temperature
lowers.
AL04
Circulating fluid
discharge temp. drop
A.RUN
Check that the filled circulating fluid
temperature is within the specified range.
AL05
High circulating fluid
return temp.
A.STP
・
Check that the circulating fluid flows.
・
Check that the heat load is within the
specified range.
AL08
Circulating fluid
discharge pressure rise
A.STP
Check that there is no bend, collapse and
clog on/in the external piping.
In case of displaying EEEE on the PI display
of the main display and check monitor menu,
the pressure sensor of the circulating fluid
circuit has a malfunction. Ask the service.
AL09
Circulating fluid
discharge pressure
drop
A.STP
Restart and check if the pump runs.
In case of displaying EEEE on the PI display
of the main display and check monitor menu,
the pressure sensor of the circulating fluid
circuit has a malfunction. Ask the service.
AL10
High compressor
suction temp.
P.RUN
・
Check the returned circulating fluid
temperature.
・
Check that the heat load is within the
specified range.
AL11
Low compressor
suction temp.
P.RUN
AL12
Low super heat
temperature
P.RUN
・
Check that the circulating fluid flows.
・
Use 15% ethylene glycol aqueous solution
with the set temperature lower than 10 deg.
C.
AL13
High compressor
discharge pressure
P.RUN
Check that the ambient and circulating fluid
temperature are within the specified ranges.
AL15
Refrigerant circuit
pressure (high pressure
side) drop
P.RUN
Malfunction of the refrigeration circuit
occurred.
Ask for the service.
AL16
Refrigerant circuit
pressure (low pressure
side) rise
P.RUN
Check that the ambient and circulating fluid
temperature are within the specified ranges.
AL17
Refrigerant circuit
pressure (low pressure
side) drop
P.RUN
Check that the circulating fluid flows higher
than the minimum operating flow rate..
AL18
Compressor running
failure
P.RUN
Restart and check if the compressor runs
after leaving for 10 minutes.
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.