DOC1001322
Chapter 6 Alarm Notifications and Troubleshooting
HRL Series 6.3 Troubleshooting
Table 6.3-1 Alarm codes and troubleshooting (1/2)
Sub code Operation Threshold
Check that there is no abnormality
with the power supply system
(e.g. ground fault, short-circuit, voltage
fluctuation,abnormal interphase voltage,
open phase, surge).
AL20 FLT 1 0.03MPa 3 Restart the thermo-chiller and check if the pump runs.
AL28 4 WRN 2 45.0μS/cm 3 Replace DI filter.
Shut off the power to this product and restart it without
connecting usb port.
No request message from the host computer.
Try to send the request message again.
High Electric conductivity
Contact input has been detected.
Short-circuit or broken wire of the pressure
sensor.Ask for the service.
Check that there is no bending, collapse,
or clogging with the external piping.
・There may be causes such as large
load fluctuation and flow rate fluctuation.
・Please review the setting value.
・Check that the circulating fluid flow rate
is more than the minimum flow rate.
・Check that the heat load is within
the specified range.
・Check that the ambient temperature,
and heat load satisfy the specifications,
and that the circulating fluid flow rate is
more than the minimum flow rate.
・Please review the setting value.
・Check the effect of ambient temperature.
・Please review the setting value.
Cause/Countermeasure
(Please reset the alarm after eliminating the cause.)
The circulating fluid level has decreased.
Refilling circulating fluid.
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