Daikin EWWH455DZXSA2 [34/47] Emergency stop

Daikin EWWDC14DZXSA2 [34/47] Emergency stop
D-EOMWC01405-18EN
34/47
EWWD_DZ EWWH_DZ
Check if water filter is clogged.
Check flow switch connections.
Reset
Notes
Local HMI
Network
Auto
6.3.3 Emergency Stop
This alarm is generated any time the Emergency Stop button is activated.
Symptom
Cause
Solution
Unit status is Off.
All circuits are stopped immediately.
Bell icon is moving on controller’s display.
String in the alarm list:
UnitOffEmergencyStop
String in the alarm log:
UnitOffEmergencyStop
String in the alarm snapshot
UnitOffEmergencyStop
Emergency stop button has been pushed.
Turning counterclockwise the emergency
stop button, the alarm should be cleared.
Reset
Notes
Local HMI
Network
Auto
Please see note on the top.
6.3.4 Evaporator Flow Loss alarm
This alarm is generated in case of flow loss to the chiller to protect the machine against freezing.
Symptom
Cause
Solution
Unit status is Off.
All circuits are stopped immediately.
Bell icon is moving on controller’s display.
String in the alarm list:
UnitOffEvapWaterFlow
String in the alarm log:
UnitOffEvapWaterFlow
String in the alarm snapshot
UnitOffEvapWaterFlow
No water flow sensed for 3 minutes
continuously or water flow too low.
Check the water pump filler and the water
circuit for obstructions.
Check the flow switch calibration and
adapt to minimum water flow.
Check if pump impeller can rotate freely
and has no damages.
Check pumps protection devices (circuit
breakers, fuses, inverters, etc.)
Check if water filter is clogged.
Check flow switch connections.
Reset
Notes
Local HMI
Network
Auto
6.3.5 Evaporator Leaving Water Temperature (LWT) sensor fault
This alarm is generated any time that the input resistance is out of an acceptable range.
Symptom
Cause
Solution
Unit status is Off.
All circuits are stopped with a normal
shutdown procedure.
Bell icon is moving on controller’s display.
String in the alarm list:
UnitOffLvgEntWTempSen
String in the alarm log:
UnitOffLvgEntWTempSen
String in the alarm snapshot
UnitOffEvpLvgWTempSen
Sensor is broken.
Check for sensor integrity.
according table and allowed kOhm (k)
range.
Check correct sensors operation
Sensor is shorted.
Check if sensor is shorted with a
resistance measurement.
Sensor is not properly connected (open).
Check for absence of water or humidity on
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

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