Daikin EWAD620-C17C-SS, Service Manual

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ESIE10-01 General Outline
Part 1 – System Outline 1–11
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Control section - main features
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Management of the compressor stepless capacity and fans modulation.
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Chillers enabled to work in partial failure condition.
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Full routine operation at condition of:
• high ambient temperature value.
• high thermal load.
• high evaporator entering water temperature (start-up).
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Display of evaporator entering/leaving water temperature.
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Display of Outdoor Ambient Temperature.
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Display of condensing-evaporating temperature and pressure, suction and discharge superheat for
each circuit.
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Leaving water evaporator temperature regulation. Temperature tolerance = 0.1°C.
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Compressors and evaporator pumps hours counter.
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Display of Status Safety Devices.
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Number of starts and compressors working hours.
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Optimized management of compressors load.
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Fan management according to condensing pressure.
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Re-start in case of power failure (automatic / manual).
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Soft Load (optimized management of the compressors load during the start-up).
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Start at high evaporator water temperature.
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Return Reset (Set Point Reset based on return water temperature).
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OAT (Outside Ambient temperature) Reset.
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Set point Reset (optional).
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Application and system upgrade with commercial SD cards.
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Ethernet port for remote or local servicing using standard web browsers.
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Two different sets of default parameters could be stored for easy restore.
Safety device / logic for each refrigerant circuit
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High pressure (pressure switch).
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High pressure (transducer).
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Low pressure (transducer).
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Fans circuit breaker.
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High compressor discharge temperature.
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High motor winding temperature.
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Phase Monitor.
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Low pressure ratio.
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High oil pressure drop.
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Low oil pressure.
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No pressure change at start.
System security
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Phase monitor.
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Low Ambient temperature lock-out.
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Freeze protection.