Hitachi SAMURAI CLG2, Manual, Page: 20 / 118

Operation Instructions
Technical Catalogue
TCGB0051 rev 0 - 09/2009
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3.1. HITACHI condenserless Water Chiller Models: RCUE(40~120)CLG2
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To Start the Unit.
1. Open the water inlet and outlet valves.
2. After assuring that all control switches have been cut OFF, and the “LOCAL/REMOTE” switch on the
printed circuit board is in the “LOCAL” position, turn ON the power switch.
3. Confirm that phases R, S and T are correctly connected. The correct phase connection can be
checked by a phase sequence indicator. If not correctly connected, the compressor does not start due
to activation of a reversal phase protection device. Cut the main switch and interchange two of three
terminals, R, S and T at the main power source terminals.
4. Fully open the discharge and liquid line stop valves.
5. Operate the chilled water pump.
6. Set the Dip SW at the desired temperature
7. Depress the “ON” push button of the operation Switch
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To Stop the Unit
1. Depress the “*OFF” push button switch.
( * Field –Supplied)
2. Switch OFF the main power source when the unit is shut down for a long period of time.
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Pilot Lamp
The red LED indicates the normal operation.
When the orange LED is activated, any one of the safety devices may be functioning.
Please contact your service shop, if this condition is detected.
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Daily Checking
1. Check the power supply to ensure that it is proper.
2. Check for abnormal sounds and vibrations.
3. Check the unit amperage.
4. Check the operating pressure.
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Troubleshooting
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Unit Does Not Start
1. Is the main switch ON?
2. Is the main fuse OK?
3. Is the chilled water running?
4. Are the thermostats calling for the cooling operation?
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Poor Cooling Operation
1. Is there sufficient Air supplied to the condenser?
2. Is the setting temperature correct?
3. Are the operating pressures normal?
4. Is there sufficient water running through the water cooler?
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Maintenance
1. Remove any obstacles to condenser Airflow, and clean the condenser.
2. Clean the unit with a cleaner.
3. Clean the water cooler. (It is recommended that a specialist will be contacted for this type of work.)
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DANGER :
Switch OFF main interruptor (M.I) for any work inside Electrical Box.