HRX-OM-J022
5 Error Message and Troubleshooting
5.2 Troubleshooting
HRG001-W HRG002-W HRG005-W
1
st
edition : Jul. 2005
5-2
5.2 Troubleshooting
Table 5-2 Troubleshooting
Alarm
Unit status
Cause
Remedies
How to
reset
Power is not supplied.
Supply the power.
A breaker is tripped.
Fix a short or ground fault.
Low voltage
Supply a rated voltage.
Power error
The [POWER]
LED is not
turned on.
Failure in the [POWER] LED
Ask for service.
Manual
reset
One of the three-phase power is
interrupted. A voltage sag
occurred.
Normal according to product spec.
Supply three-phase power.
Failure in the [RUN] LED
Ask for service.
Startup failure
The [RUN]
LED remains
off even with
the press of
the [ON]
switch.
Failure in the [ON] switch
Ask for service.
Auto
reset
Reverse of
pump and
compressor
Reverse phase
relay starts.
Incorrect phase sequence of
power wiring
Normal according to product spec.
Rewire the power cable for two of
three phases. Wiring should be
performed by a qualified person.
Auto
reset
Tank water
level drop
Level switch
contact is
opened.
Inadequate water in the tank
(natural evaporation)
Normal according to product spec.
Circulating water is low in amount.
Supply the circulating water.
Auto
reset
Power voltage sag
Normal according to product spec.
Boost up the capacity of power
breaker. Wiring should be
performed by a qualified person.
Abnormal rise in circullating fluid
pressure
Adjust the opening of the manual
relief valve. Ask for service.
Pump
overload
Pump thermal
overload
switch has
been tripped.
Abnormal failure of pump
Change the pump.
Ask for service.
Manual
reset
Power voltage sag
Normal according to product spec.
Boost up the capacity of power
breaker. Wiring should be
performed by a qualified person.
Abnormal heat dissipation
capability of condensor.
Normal according to product spec.
Improve ambient conditions to
provide ventilation and exhaust
heat.
Improper rated cooling capability
Normal according to product spec.
Reduce a calorific value output
from user’s unit.
Refrigerant leak
Abnormal failure in the
compressor
Compressor
overload
Compressor
thermal
overload
switch has
been tripped.
Failure in the electromagnetic
switch
Ask for service to get the
refrigerant gas charged and the
compressor and electromagnetic
switch replaced.
Manual
reset
Rise in ambient temperature
Improve ambient conditions. Avoid
installing it at a place exposed to
direct sunlight or radiant heat.
Improper rated cooling capability
Normal according to product spec.
Reduce a calorific value output
from user’s unit.
Refrigerant leak
Failure in the refrigerant solenoid
valve
Failure in the compressor
Other abnormalities in the
refrigeration circuit
Failure in the temperature
controller
Ask for service to get the
refrigerant gas charged and the
compressor and electromagnetic
switch replaced.
Over the cooling capability
Reduce a calorific value output
from user’s unit.
High temp. of
recirculating
fluid
The contact of
temperature
controller EV1
is opened
Abnormal failure of fan motor
Replace the fan motor.
Ask for service.
Auto
reset
