Hitachi RCUE40AG1-400AG1, Руководство по обслуживанию

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TROUBLESHOOTING
1
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Check valve
(Air heat exchanger side)
Malfunction
Replace check valve
Expansion Valve Clogging Remove Clogging
Suction gas
temperature is
excessively high
(excessive
superheat)
Strainer Clogging Replace or clean the strainer
Discharge gas
control is activated
(  -  alarm)~
(

-

alarm)
Discharge gas
Thermistor Failure
Check thermistor resistance
Replace discharge gas
thermistor
Fan motor bearing
failure
Lock Status Replace fan motor
Single Phase
Running
Check magnetic contactor Replace magnetic switch
Motor Insulation
Deteriorated
Measure insulation resistance Replace fan motor
Power Voltage excessively high
or low
Set voltage within working
range during operation
Power Voltage Phase
Imbalance
Measure the voltage in each
interphase and ask Power
Company for the advice
Compressor Drive
Excessive Current
Discharge pressure is
excessively high
Analyze the cause
Power Fuse melted Replace power fuse
Loose Power Terminal Screw Retighten the screw
Single Phase
Running
Contact point of compressor
Motor magnetic Contactor
Roughness
Replace contact points
Compressor
Bearing Failure
Lock Status
Compressor Motor
insulation Failure
Measure insulation resistance
Replace compressor
Thermal relay for
compressor is
activated
(  -  alarm)~
(  -  alarm)
Compressor internal
thermostat is
activated
(  -  alarm)~
(  -  alarm)
Fan internal
thermostat is
activated
(  -  alarm)~
(  -  alarm)
Compressor Motor
Over-current relay
Failure
Measure current of compressor
motor
Replace over-current Relay
Pump locked
Check freezing of water,
clogging of foreign particle
Remove them
Pump Over-current
relay RC value
Wrong
Check the RC value and pump
running current
Change the RC value or
replace magnetic contactor
Pump over-current
relay is activated
(  alarm)
Pump Over-current
relay Failure
Push reset button. Check the
running current
Replace magnetic contactor
Shortage of water
Flw
Check the difference of
temperature between inlet and
outlet of chilled water
Increase water flow
Water Strainer Clogging Clean the strainer
Pump reverse
rotated
Check rotative direction Repair to correct direction
Air mixed Open Air Vent Valve Evacuate Air
Unit stops
during
cooling
operation
Freeze protection
control is activated
(  alarm)
Thermistor Failure
(  alarm)
(  alarm)
(  alarm)
(  alarm)
Check inlet temperature of
chilled water
Replace Thermistor