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5.3.5 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
5.3.6 Evaporator Water Freeze alarm
This alarm is generated to indicate that the water temperature (entering or leaving) has dropped below a safety limit.
Control tries to protect the heat exchanger starting the pump and letting the water circulate.
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:
UnitOffEvapWaterTmpLo
String in the alarm log:
UnitOffEvapWaterTmpLo
String in the alarm snapshot
UnitOffEvapWaterTmpLo
Water flow too low.
Increase the water flow.
Inlet temperature to the evaporator is
too low.
Increase the inlet water temperature.
Flow switch is not working or no water
flow.
Check the flow switch and the water
pump.
Sensors readings (entering or leaving)
are not properly calibrated.
Check the water temperatures with a
proper instrument and adjust the
offsets
Wrong freeze limit setpoint.
The freeze limit has not been
changed as a function of glycol
percentage.
Reset
Notes
Local HMI
Network
Auto
It’s required to check if the evaporator
has any damage due to this alarm.
5.3.7 External alarm
This alarm is generated to indicate that an external device whose operation is linked with this unit operation. This external
device could be a pump or an inverter.
Symptom
Cause
Solution
Unit status is Off.
All circuits are switched off with the
normal shutdown procedure.
Bell icon is moving on controller’s
display.
String in the alarm list:
UnitOffExternalAlarm
String in the alarm log:
UnitOffExternalAlarm
String in the alarm snapshot
UnitOffExternalAlarm
There is an external event that has
caused the opening, for at least 5
seconds, of the port on the controller
board.
Check causes of the external event or
alarm.
Check electrical wiring from unit
controller to the external equipment in
case of any external events or alarms
have been occurred.
Reset
Notes
Local HMI
Network
Auto
NOTE: What above applies in case of configuration of the external fault digital input as Alarm.
Bekijk gratis de handleiding van Daikin EWYS5004Z, stel vragen en lees de antwoorden op veelvoorkomende problemen, of gebruik onze assistent om sneller informatie in de handleiding te vinden of uitleg te krijgen over specifieke functies.
Productinformatie
| Merk | Daikin |
| Model | EWYS5004Z |
| Categorie | Airco |
| Taal | Nederlands |
| Grootte | 7564 MB |
