Daikin EWWH455DZXSA2 [37/47] Economizer temperature sensor fault

Daikin EWWH810DZXEA2 [37/47] Economizer temperature sensor fault
EWWD_DZ EWWH_DZ
D-EOMWC01405-18EN
37/47
Bell icon is moving on controller’s display.
String in the alarm list:
Cx EcoPressSen
String in the alarm log:
Cx EcoPressSen
String in the alarm snapshot
Cx EcoPressSen
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
Notes
Local HMI
Network
Auto
6.4.2 Economizer Temperature Sensor fault
This alarm is generated to indicate that the sensor is not reading properly.
Cause
Solution
Circuit status is On.
Sensor is shorted.
Check for sensor integrity.
Check correct sensors operation
according information about kOhm (k)
range related to temperature values.
Sensor is broken.
Check if sensor is shorted with a
resistance measurement.
Sensor is not good connected (open).
Check for correct installation of the sensor
on refrigerant circuit pipe.
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 with electrical scheme.
Notes
Local HMI
6.4.3 Power Loss (A/C units only)
This alarm indicates that a short under voltage on main power supply, that does not turn off the unit, has occurred.
Resolution of this fault requires a direct intervention on the power supply of this unit.
Direct intervention on the power supply can cause electrocution, burns or even death. This action must be
performed only by trained persons. In case of doubts contact your maintenance company.
Cause
Solution
Circuit status is On.
Chiller main power supply had a down
peak which caused the trip.
Check if main power supply is within the
acceptable tolerance for this chiller
Notes
Local HMI

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