Operation Instructions; Hitachi Air - Cooler Water Chiller Models - Hitachi RCUE40AG1 Installation, Operation And Maintenance Instructions

3. OPERATION INSTRUCTIONS

3.1. HITACHI AIR-COOLED WATER CHILLERS
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 "REMOTE" 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 liquid line stop valves.
5. Operate the chilled water pump.
6. Depress the "*ON" push button switch.
( * Field-Supplied )
7. Set the thermostat at the desired temperature
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.
Pilot Lamp
The red lamp indicates the normal operation.
When the red lamp is flickered or the orange lamp is
activated, any one of the safety devices may be
functioning.
Please contact your service shop, if this condition is
detected.
OPERATION INSTRUCTIONS
Daily Checking
1. Check the power supply to ensure that it is proper.
2. Check for abnormal sounds and vibration.
3. Check the unit amperage.
4. Check the operating pressure.
Troubleshooting
"
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?
"
Poor Cooling Operation
1. Is sufficient Air supplied to the condenser?
2. Are the setting temperature correct?
3. Are the operating pressures normal?
4. Is sufficient water running through the water cooler?
"
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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