Why is the unloaded function not working on my Hitachi Chiller?
If the unloaded function isn't working on your Hitachi Chiller, it could be due to: * Trouble with the thermistor. Adjust the setting temperature or replace the thermistor. * Trouble with the solenoid valve. Check the coil in the solenoid valve and check the oil passage for clogging. * Worn unloader mechanism. Check the unloaded system parts in the compressor.
Why is the compressor on my Hitachi RCUE60AG1 Chiller so noisy?
A noisy compressor in your Hitachi Chiller could be due to: * Slugging caused by liquid flooding back to the compressor. Check the superheat of suction gas and keep it in the proper range. * Worn parts. Check for the sound of internal parts. Replace the compressor if necessary.
What causes low discharge pressure in a Hitachi RCUE60AG1?
Low discharge pressure in a Hitachi Chiller can be attributed to: * Extremely cold condenser air. Check the ambient temperature. * Insufficient refrigerant charge. Add refrigerant. * Leakage from the compressor discharge valve. Replace the valves or the entire compressor, if required. * Suction pressure is lower than standard. See “ Low Suction Pressure.”
General| Refrigerant | R-410A |
|---|---|
| Number of Compressors | 2 |
| Type | Air-cooled scroll chiller |
| EER | 10.5 |
| Sound Pressure Level | 78 dBA |
Provides instructions for starting and stopping the unit, daily checks, and troubleshooting.
Covers required materials, installation location, space, and foundation checks.
Details precautions and steps for placing the unit, including unpacking.
Shows required service space and foundation details with diagrams.
Explains transportation methods like rigging and rollers, with safety precautions.
Details tools, schedule checks, main power wiring procedures, and control wiring.
Provides guidelines for water piping connections, including valve usage and insulation.
A checklist for verifying installation work quality and adequacy.
Describes the procedure for performing test runs on the unit.
Details Capacity Control, Delay Time, Mode Switches, and Pump Operation.
Explains DSW5 settings for capacity control and DSW2 for compressor cycling.
Explains how alarm codes are indicated on the control panel and lists common alarm codes.
Provides a method for cleaning heat exchangers and water piping.
Covers strainer checks and refrigerant charging procedures.
Explains various safety and protection controls for compressors, fans, and the refrigeration cycle.
Lists possible causes and corrective actions for fan and compressor operational faults.
Details causes and actions for compressor stops due to pressure, relay, or thermostat issues.
Addresses causes and corrective actions for insufficient cooling, noisy operation, and misc. noise.
Explains causes and actions for faults related to high/low pressure, and flow problems.
Shows the power circuit wiring diagram for various model groups.
Shows the control circuit wiring diagram for specific models.
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