HRX-OM- T002
Chapter 7 Alarm Notification and Troubleshooting
HRS090 Series
7.3
Troubleshooting
7-5
Table 7-1 Alarm codes 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
Fluid level shown by the fluid level meter has
fallen. Supply or add circulating fluid.
AL02
High
circulating
fluid
discharge temp.
A.STP
･
Check that the ambient temperature, facility
water, and heat load satisfy the specifications, and
that the circulating fluid flow rate is more than the
minimum flow rate.
･
Circulating fluid flow rate can be checked with the
check
“monitor menu.
･
Change the set value of AS.04 to be appropriate.
･
Wait until the circulating fluid temperature goes
down.
AL03
Circulating fluid discharge
temp. rise
A.RUN
AL04
Circulating fluid discharge
temp. drop
A.RUN
･
Check that the circulating fluid temperature
supplied to the tank is within the specified range.
･
Change the set value of AS.06 to be appropriate.
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.STP
Check that there is no bending, collapse, or
clogging with the external piping.
"EEEE" shown on the PI display in the check
monitor menu indicates shirt-circuit or broken wire
of the pressure sensor in the circulating fluid
circuit. Ask for the service for the pressure sensor..
AL09
Circulating fluid discharge
pressure drop
A.STP
Restart the thermo-chiller 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 circulating fluid temperature returning
to the thermo-chiller.
･
Check that the heat load is within the specified
range.
AL11
Low compressor suction
temp.
P.RUN
･
Check that the circulating fluid flows.
･
Use a 15% ethylene glycol aqueous solution
when operating with a set temperature lower than
10
o
C.
AL12
Low
super
heat
temperature
P.RUN
AL13
High compressor discharge
pressure
P.RUN
Check that the ambient temperature, facility water,
and heat load satisfy the specifications.
AL15
Refrigerant circuit pressure
(high pressure side) drop
P.RUN
Refrigerant circuit failed.
Ask for service for the refrigerant circuit.
AL16
Refrigerant circuit pressure
(low pressure side) rise
P.RUN
Check that the ambient temperature, facility water,
and heat load satisfy the specifications.
AL17
Refrigerant circuit pressure
(low pressure side) drop
P.RUN
Check that the circulating fluid flows.
