Daikin EWAT_B User Manual

Air Cooled chiller with scroll compressors
EWAT_B
REV
00
Date
June 2018
Supersedes
/
Operating Manual
D-EOMAC01706-18EN

Daikin EWAT_B Specifications

General

Brand	Daikin
Model	EWAT_B
Category	Chiller
Language	English

Summary

1 SAFETY CONSIDERATIONS

1.1 General

General safety precautions for installation, start-up, and servicing.

1.3 Avoid electrocution

Safety measures to prevent electrocution during maintenance.

3 USING THE CONTROLLER

3.1 Navigating

3.2 Passwords

3.4 Basic Control System Diagnostic

3.7 Embedded Web Interface

How to access and use the unit's embedded web interface.

4 WORKING WITH THIS UNIT

4.1 Chiller On/Off

How to enable/disable the chiller using physical selectors and software.

4.1.2 Scheduler and Silent mode functionalities

Programming automatic start/stop and silent mode.

4.2 Water Setpoints

Defining and managing primary and secondary water setpoints.

4.3 Unit Mode

4.3.1 Energy Saving mode

Enabling energy saving function to reduce power consumption.

4.4 Unit Status

4.5 Network Control

Controlling unit parameters via serial protocol.

4.6 Thermostatic Control

4.10 Power Conservation

4.10.1 Demand Limit

Limiting unit load via an external 4-20 mA signal.

4.10.2 Setpoint Reset

Overriding setpoints based on OAT, 4-20mA signal, or Evaporator AT.

4.10.2.1 Setpoint Reset by OAT (A/C units only)

4.10.2.2 Setpoint Reset by External 4-20Ma signal

4.10.2.3 Setpoint Reset by DT

4.12 Controller IP Setup

4.12 Controller IP Setup

Configuring the controller's IP address, subnet mask, and gateway.

5 ALARMS AND TROUBLESHOOTING

5.1 Unit Alerts

5.1.1 BadLWTReset - Bad Leaving Water Temperature Reset Input

Alarm for an out-of-range LWT reset input signal.

5.1.2 Energy MeterComm - Energy Meter Communication Fail

5.1.3 EvapPump1Fault - Evaporator Pump #1 Failure

Failure of the evaporator pump #1.

5.1.4 EvapPump2Fault - Evaporator Pump #2 Failure

Failure of the evaporator pump #2.

5.1.6 HeatRec EntWTempSen - Heat Recovery Entering Water Temperature sensor fault (A/C units only)

Fault in the heat recovery entering water temperature sensor.

5.1.7 HeatRec LvgWTempSen - Heat Recovery Leaving Water Temperature sensor fault (A/C units only)

Fault in the heat recovery leaving water temperature sensor.

5.1.8 HeatRec FreezeAlm - Heat Recovery Water Freeze Protect alarm (A/C units only)

Heat recovery water temperature dropped below safety limit.

5.1.9 Option1 BoardComm - Optional board 1 communication fail (A/C units only)

Communication failure with optional board 1.

5.1.10 Option2BoardComm - Optional board 2 communication fail

5.2 Unit Pumpdown Alarms

5.2.1 UnitOff EvpEntWTempSen - Evaporator Entering Water Temperature (EWT) sensor fault

5.2.2 UnitOffLvgEntWTempSen - Evaporator Leaving Water Temperature (LWT) sensor fault

5.2.3 UnitOffAmbTempSen - Outside Air Temperature sensor fault (A/C units only)

5.3 Unit Rapid Stop Alarms

5.3.1 UnitOffEvap WaterTmpLow - Evaporator Water Temperature Low alarm

5.3.2 UnitOff ExternalAlarm - External alarm

5.3.3 PVM alarm (A/C units only)

5.3.4 UnitOff EvapWaterFlow - Evaporator Water Flow Loss alarm

5.3.5 UnitOff EXVDriverComm - EXV Driver Extension Communication Error

5.4 Circuit Pumpdown Stop Alarms

5.4.1 Discharge Temperature Sensor fault

5.4.2 CxOff OffSuctTempSen - Suction Temperature Sensor fault

5.4.3 CxOff Gas Leakage - Gas Leakage fault

5.5 Circuit Rapid Stop alarms

5.5.1 CxOff CondPressSen - Condensing Pressure sensor fault

5.5.2 CxOff EvapPressSen - Evaporating Pressure sensor fault

5.5.3 CxOff DischTmpHigh - High Discharge Temperature Alarm