Hitachi RCUE210AG2 User Manual

SMGB0003 rev.0 - 01/2007
pag. 142
Troubleshooting
Pump runs,
but neither
fan nor
compressor
run.
Printed Circuit
Board Failure
Wiring Connection Failure
Check circuit by tester
Repair the wiring
connection
connection
Printed Circuit Board
Failure
Check circuit by tester Check
Printed Circuit Board by self-
checking function
Replace Printed Circuit
Board
Remote Control Switch Failure
Operative by the unit side
Replace remote control
switch.
switch.
Fan Magnetic
Contactor Failure
(Cooling Operation)
Coil Broken
Coil Broken
Coil Broken
Coil Broken
Coil Broken
Check circuit by tester
Check circuit by tester
Check circuit by tester
Replace magnetic
contactor.
Contact Point Failure
Measure the voltage between
contact points of magnetic
contactor.
Pump and
compressor
run, but fan
does not run
does not run
Fan Motor Failure
Measure the interphase
resistance
resistance
Replace fan motor
Pump and
fan run but
compressor
does not
run.
Printed Circuit
Board Failure
Wiring Connection
Wiring Connection
Wiring Connection
Failure
Failure
Check circuit by tester
Repair the wiring
connection.
Printed Circuit Board
Printed Circuit Board
Printed Circuit Board
Failure
Failure
Thermistor Malfunction
Measure the thermistor
resistance
Replace thermistor
Compressor
Magnetic Contactor
Failure
Coil Breaking
Coil Breaking
Coil Breaking
Coil Breaking
Coil Breaking
Check circuit by tester
Check circuit by tester
Check circuit by tester
Replace magnetic
contactor
Contact points Failure
Measure the voltage between
contact points of electromagnetic
contactor
contactor
Thermostat is activated. (Thermo-Off)
Change water temperature or
Change water temperature or
change the setting temperature.
change the setting temperature.
It is not failure
Compressor Motor Failure
Measure the interphase
resistance
resistance
Replace compressor
Compressor Failure
Compressor Failure
Compressor Failure
Compressor Failure
Compressor Failure
Compressor Failure
Compressor Failure
Compressor Failure
Compressor Failure
Compressor Failure
Compressor Failure
Beat noise from compressor
Beat noise from compressor
Beat noise from compressor
Unit stops
during
cooling
operation
Voltage at starting up is low.
Measure the voltage
Consult with electric
Consult with electric
power company
power company
Discharge pressure
is excessively
high, so that high
pressure switch
activates.
(C1-H1)~ (C6-H6)
Insuffi cient air in air side
heat exchanger
Excessive dust in air side heat
exchanger
exchanger
Remove it.
Inlet or outlet of air side heat
Inlet or outlet of air side heat
exchanger is clogged
exchanger is clogged
Shortage of Service Space for
Shortage of Service Space for
Chiller Unit
Chiller Unit
Secure the service space
Reverse Rotation of Fan Motor
Change wiring for fan
Change wiring for fan
motor
motor
Air temperature through
air side heat exchanger
is excessively high
Air Short Circuits in Chiller Unit
Air Short Circuits in Chiller Unit
Air Short Circuits in Chiller Unit
Remove short-circuits
Remove short-circuits
Another heat source around
chiller unit
chiller unit
Remove heat source
Refrigerant excessive
charge
charge
Check cycle temperature.
Charge correct quantity
of refrigerant
of refrigerant
Non-condensable gas in
the refrigerant cycle
Turn off the unit and check
Turn off the unit and check
the relation between water
temperature and pressure.
temperature and pressure.
Charge refrigerant again
after the evacuation
High pressure pipe
clogging
clogging
Check clogging
Check clogging
Expansion Valve
clogging
clogging
Remove clogging, or
replace check valve
Check Valve (Air side
Check Valve (Air side
Check Valve (Air side
heat exchanger side)
clogging
clogging
Strainer Clogging
Check the difference of
Check the difference of
temperature before and after of
strainer.
strainer.
Replace or clean the
strainer
Chilled water inlet
Chilled water inlet
Chilled water inlet
temperature of Water
side heat exchanger is
excessively high
excessively high
excessively high
Confi rm if it is within the working
range
Check the status of heat
load in detail and take a
countermeasure
Discharge gas
control is activated
Suction gas temperature
is excessively high
(Excessively super heat)
Gas leakage or refrigerant
shortage
Charge correct quantity
of refrigerant after
checking gas leakage

Hitachi RCUE210AG2 Specifications

General

Brand	Hitachi
Model	RCUE210AG2
Category	Chiller
Language	English