Hitachi RCUE210AG2 User Manual

SMGB0003 rev.0 - 01/2007
pag. 143
Troubleshooting
5
5
Unit stops
during
cooling
operation
Discharge gas
control is activated
(

-

alarm)~
(

-

alarm)
Suction gas
temperature
is excessively
high (excessive
superheat)
Check valve
Check valve
(Air heat exchanger side)
Malfunction
Malfunction
Replace check valve
Expansion Valve Clogging
Expansion Valve Clogging
Expansion Valve Clogging
Remove Clogging
Remove Clogging
Remove Clogging
Strainer Clogging
Strainer Clogging
Strainer Clogging
Replace or clean the strainer
Replace or clean the strainer
Discharge gas
Thermistor Failure
Thermistor Failure
Check thermistor resistance
Replace discharge gas
thermistor
thermistor
Thermal relay for
compressor is
activated
(

-

alarm)~
(

-

alarm)
Compressor internal
thermostat is
activated
(

-

alarm)~
(

-

alarm)
Fan internal
thermostat is
activated
(

-

alarm)~
(

-

alarm)
Fan motor bearing
failure
failure
Lock Status
Replace fan motor
Single Phase
Single Phase
Running
Running
Check magnetic contactor
Replace magnetic switch
Motor Insulation
Deteriorated
Deteriorated
Measure insulation
resistance
resistance
Replace fan motor
Compressor Drive
Excessive Current
Power Voltage excessively
high or low
high or low
Set voltage within working
Set voltage within working
range during operation
range during operation
Power Voltage Phase
Imbalance
Measure the voltage in each
interphase and ask Power
Company for the advice
Company for the advice
Discharge pressure is
excessively high
excessively high
Analyze the cause
Single Phase
Running
Power Fuse melted
Power Fuse melted
Replace power fuse
Replace power fuse
Replace power fuse
Loose Power Terminal
Screw
Screw
Retighten the screw
Contact point of compressor
Contact point of compressor
Motor magnetic Contactor
Roughness
Roughness
Replace contact points
Compressor Bearing
Compressor Bearing
Failure
Failure
Lock Status
Replace compressor
Compressor Motor
Compressor Motor
insulation Failure
insulation Failure
Measure insulation
resistance
resistance
Compressor Motor
Compressor Motor
Over-current relay
Failure
Failure
Measure current of
compressor motor
Replace over-current Relay
Pump over-current
relay is activated
(

alarm)
Pump locked
Check freezing of water,
Check freezing of water,
clogging of foreign particle
clogging of foreign particle
Remove them
Pump Over-current
Pump Over-current
relay RC value
Wrong
Wrong
Check the RC value and
pump running current
Change the RC value or
replace magnetic contactor
Pump Over-current
Pump Over-current
relay Failure
relay Failure
Push reset button. Check
Push reset button. Check
the running current
the running current
Replace magnetic contactor
Freeze protection
control is activated
(

alarm)
Shortage of water
Flow
Check the difference of
Check the difference of
temperature between inlet
and outlet of chilled water
and outlet of chilled water
Increase water fl ow
Water Strainer Clogging
Water Strainer Clogging
Water Strainer Clogging
Clean the strainer
Clean the strainer
Clean the strainer
Pump reverse
rotated
rotated
Check rotative direction
Repair to correct direction
Air mixed
Air mixed
Open Air Vent Valve
Open Air Vent Valve
Open Air Vent Valve
Evacuate Air
Evacuate Air
Thermistor Failure
(

alarm)
(

alarm)
(

alarm)
(
(

alarm)
alarm)
Check inlet temperature of
chilled water
Replace Thermistor

Hitachi RCUE210AG2 Specifications

General

Brand	Hitachi
Model	RCUE210AG2
Category	Chiller
Language	English