Daikin MICROTECH III Operating Manual page 55

10.8.13 EEXV Comm Failure #
This alarm is generated in case of communication problems with the EEXVx module.
Symptom
Circuit status is Off.
All circuits are stopped immediately.
Bell icon is moving on controller's
display. String in the alarm list: Cx
OffEXVCtrlrComFail String in the
alarm log:
Cx OffEXVCtrlrComFail
String in the alarm snapshot
Cx OffEXVCtrlrComFail
Reset
Local HMI
Network
Auto
10.8.14 Evaporator Pressure Sensor Fault
This alarm indicates that the evaporating pressure transducer is not operating properly.
Symptom
Circuit status is Off.
The circuit is stopped.
Bell icon is moving on controller's
display.
String in the alarm list:
CxCmp1 EvapPressSen
String in the alarm log:
CxCmp1 EvapPressSen
String in the alarm snapshot
CxCmp1 EvapPressSen
Reset
Local HMI
Network
Auto
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Cause
Module has no power supply
Module address is not properly set
Module is broken



Cause
Sensor is broken.
Sensor is shorted.
Sensor is not properly connected
(open).



Operation Manual
Solution
Check the power supply from the
connector on the side of the module.
Check if LEDs are both green.
Check if the connector on the side is
tightly inserted in the module.
Check if module's address is correct
referring to the wiring diagram.
Check if LED are on and both green.
If BSP LED is solid red replace the
module.
Check if power supply is ok but LEDs
are both off. In this case replace the
module.
Notes
Solution
Check for sensor integrity. Check
correct sensors operation according
information about mVolt (mV) range
related to pressure values in kPa.
Check if sensor is shorted with a
resistance measurement.
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.
Notes
D–EOMWC00A07-16_02EN