HRX-OM-R026
Chapter 7 Alarm indication and trouble shooting
HRSH Series
7.3
Troubleshooting
7-5
Table 7-1 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.RUN
The fluid level of the level indicator has fallen.
Fill the circulating fluid.
AL02
High circulating fluid
discharge temp.
A.STP
・
Check that the ambient temperature, facility
water specifications and heat load are within
the specified ranges.
・
Wait until the circulating fluid temperature
lowers.
AL03
Circulating
fluid
discharge temp. rise
A.RUN
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.
AL06
High circulating fluid
discharge pressure
A.STP
Check that there is no bend, collapse and
clog on/in the external piping.
AL07
Abnormal
pump
operation
A.STP
The pump does not operate. Check that the
pump thermal operation switch is operated.
AL08
Circulating
fluid
discharge pressure rise
A.RUN
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.RUN
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
・
Check that the circulating fluid flows.
・
Use 15% ethylene glycol aqueous solution
with the set temperature lower than 10 deg.
C.
AL12
Low
super
heat
temperature
P.RUN
AL13
High
compressor
discharge pressure
P.RUN
Check that the ambient temperature, facility
water specifications and heat load 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 temperature, facility
water specifications and heat load 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..