HRX-OM-L014
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HRGC001-A HRGC002-A HRGC005-A
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1
st
edition : Jun. 2007
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-3
6.2 Remedy for Error
Table 6-2 Remedy for error
Alarm
number
Content of
alarm
(protective
equipment)
Main cause
Remedy
Incorrect power supply
Supply the voltage within a specified range of the unit.
Review the voltage of the power supply.
Excessive increase of water
fed pressure
Adjust the opening of the manual relief valve to decrease
the fed water pressure.
Failure of pump
Replace the pump.
AL02
Pump overload
(Pump thermal
relay)
Failure of thermal relay
Replace the thermal relay.
Incorrect power supply
Supply the voltage within a specified range of the unit.
Review the voltage of the power supply.
Clogging of condenser
Clean the condenser.
Too high ambient
temperature
Decrease the ambient temperature to within the specified
range of the unit. Add air ventilation and conditioning
facility in the installation area.
Beyond cooling capacity
Check the heat generated from the user’s machine is
within a specified range of the unit.
Refrigerant leaakge
Repair the leaking part and refill the refrigerant gas.
Failure of compressor
Replace the compressor.
AL03
Compressor
overload
(Compressor
thermal relay)
Failure of thermal relay
Replace the thermal relay.
Evaporation of recirculating
fluid
Refill the recirculating fluid.
Recirculating fluid leakage
Repair the leaking part and refill the recirculating fluid.
Leakage due failure of the
pump mechanical seal
Replace the mechanical seal. The replacement method
can be found in the maintenance manual available
separately.
AL04
Low level in
tank
(Level switch)
Failure of level switch
Replace the level switch.
Clogging of condenser
(only for
HRGC00
∗
-A
)
Clean the condenser.
Too high ambient
Temperature
(only for
HRGC00
∗
-A
)
Decrease the ambient temperature to within the specified
range of the unit. Add air ventilation and conditioning
facility in the installation area.
No flow of facility water
（
only for HRGC00
∗
-W
）
Supply the facility water to the product.
Check that the facility water circuit is not shut off by valves.
Check that there is no problem with equipment to supply
the facility water.
Beyond cooling capacity
Check the heat generated from the user’s machine is
within a specified range of the unit.
AL05
Refrigerant high
pressure
(Pressure
switch)
Failure of pressure switch
Repalce the pressure switch.
Too high ambient
temperature
Decrease the ambient temperature to within the specified
range of the unit. Add air ventilation and conditioning
facility in the installation area.
Beyond cooling capacity
Check the heat generated from the user’s machine is
within a specified range of the unit.
Low flow rate of
recirculating fluid
Adjust the opening of the manual bypass valve.
Refrigerant leakage
Repair the leaking part and supply the refrigerant gas.
Failure
of
refrigerant
solenoid valve
Replace the solenoid valve.
Failure of compressor
Replace the compressor.
Other failure in refrigerant
circucit
Replace the refrigerant circuit.
AL06
Fed water high
temp.
(Controller)
Failure of controller
(only for
HRGC00
∗
-A5
)
Replace the controller.
