Daikin EWAT_B User Manual

EWAT_B
Operating Manual
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Circuit status is Off.
The circuit is stopped.
Bell icon is moving on controller’s display.
String in the alarm list:
CxOff CondPressSen
String in the alarm log:
 CxCmp1 CondPressSen
String in the alarm snapshot
CxCmp1 CondPressSen
Sensor is broken.
Check for sensor integrity.
Check correct sensors operation
according information about mVolt (mV)
range related to pressure values in kPa.
Sensor is shorted.
Check if sensor is shorted with a
resistance measurement.
Sensor is not properly connected (open).
Check for correct installation of the sensor
on refrigerant circuit pipe. The transducer
must be able to sense the pressure
through the valve’s needle.
Check for absence of water or humidity
on sensor electrical contacts.
Check for correct plug-in of the electrical
connectors.
Check for correct sensors wiring also
according electrical scheme.
Reset
Local HMI
Network
Auto



5.5.2 CxOff EvapPressSen - Evaporating Pressure sensor fault
This alarm indicates that the evaporating pressure transducer is not operating properly.
Symptom
Cause
Solution
Circuit status is Off.
The circuit is stopped.
Bell icon is moving on controller’s display.
String in the alarm list:
CxOff EvapPressSen
String in the alarm log:
 CxOff EvapPressSen
String in the alarm snapshot
CxOff EvapPressSen
Sensor is broken.
Check for sensor integrity.
Check correct sensors operation
according information about mVolt (mV)
range related to pressure values in kPa.
Sensor is shorted.
Check if sensor is shorted with a
resistance measurement.
Sensor is not properly connected (open).
Check for correct installation of the sensor
on refrigerant circuit pipe. The transducer
must be able to sense the pressure
through the valve’s needle.
Check for absence of water or humidity on
sensor electrical contacts.
Check for correct plug-in of the electrical
connectors.
Check for correct sensors wiring also
according electrical scheme.
Reset
Local HMI
Network
Auto



5.5.3 CxOff DischTmpHigh - High Discharge Temperature Alarm
This alarm indicates that the temperature at the discharge port of the compressor exceeded a maximum limit which may
cause damages to the mechanical parts of the compressor.
When this alarm occurs compressor’s crankcase and discharge pipes may become very hot. Be careful
when getting in contact with the compressor and discharge pipes in this condition.
Symptom
Cause
Solution
Circuit status is Off.
The compressor does not load anymore or
even unload, circuit is stopped.
Bell icon is moving on controller’s display.
String in the alarm list:
CxOff DischTmpHigh
String in the alarm log:
 CxOff DischTmpHigh
String in the alarm snapshot
CxOff DischTmpHigh
Liquid Injection solenoid valve is not
operating properly.
Check the electrical connection between
the controller and the liquid injection
solenoid valve.
Check if the solenoid coil operates
properly
Check if the digital output operates
correctly.
Liquid injection orifice is small.
Check if when the liquid injection solenoid
is activated the temperature can be
controlled between the limits.
Check that the liquid injection line is not
obstructed by observing the discharge
temperature when it is activated.
Discharge temperature sensor could not
operate properly.
Check for proper operation of the
discharge temperature
Reset

Daikin EWAT_B Specifications

General

Brand	Daikin
Model	EWAT_B
Category	Chiller
Language	English