HRX-OM-X037
Chapter 7 Alarm Notifications and Troubleshooting
HRL Series 7.3 Troubleshooting
Table 7.3-1 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).
Air exhaust fan failure. Ask for service for the air exhaust
fan.
AL20 FLT 1 0.03MPa 3 Restart the thermo-chiller and check if the pump runs.
AL27 WRN 2 45.0μS/cm 3 Replace CH2 DI filter.
AL28 4 WRN 2 45.0μS/cm 3 Replace CH1 DI filter.
Less than 2.0LPM
-T2:Less than 5.0LPM
-T3:Less than 10.0LPM
Display flow rate : Threshold or less.
Check the piping is thin, closing of external valve, collapse
of piping, clogging of filter.
Contact input has been detected.
No request message from the host computer.
Try to send the request message again.
Short-circuit or broken wire of the flow rate sensor.
Ask for the service.
CH2 High Electric conductivity
CH1 High Electric conductivity
Check that there is no bending, collapse,
or clogging with the external piping.
Check that there is no clogging of the particle filter.
Restart the thermo-chiller and check if the pump runs.
(Check the flow rate display value.)
Short-circuit or broken wire of the pressure sensor.
Ask for the service.
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.
Check that there is no clogging of the particle filter.
・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.
・Check the effect of ambient temperature.
・Please review the setting value.
・There may be causes such as large
load fluctuation and flow rate fluctuation.
・Please review the setting value.
The circulating fluid level of CH2 has decreased.
Refilling circulating fluid.
・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.
Cause/Countermeasure
(Please reset the alarm after eliminating the cause.)
The circulating fluid level of CH1 has decreased.
Refilling circulating fluid.