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5.2.7 Outside Air Temperature (OAT) Lockout
This alarm prevents the unit to start if the outside air temperature is too low. Purpose is to prevent low pressure trips at
startup. The limit depends on the fan regulation that is installed on the unit. By default this value is set to 10 °C.
Symptom
Cause
Solution
Unit Status is OAT Lockout.
All circuits are stopped with a normal
shutdown procedure.
Bell icon is moving on controller’s
display.
String in the alarm list:
StartInhbtAmbTempLo
String in the alarm log:
StartInhbtAmbTempLo
String in the alarm snapshot
StartInhbtAmbTempLo
Outside ambient temperature is lower
than value set into unit’s controller.
Check the minimum outside ambient
temperature value set into the unit’s
controller.
Check if this value is in accordance
with chiller application, therefore
check about the proper application
and utilization of the chiller.
Improper operation of Outside
Ambient Temperature sensor.
Check for proper operation of OAT
sensor according information about
kOhm (k) range related to
temperature values.
Reset
Notes
Local HMI
Network
Auto
It clears automatically with a 2.5 °C of
hysteresis.
5.2.8 Outside Air Temperature sensor fault alarm
This alarm is generated any time the input resistance is out of an acceptable range.
Symptom
Cause
Solution
Unit status is Off.
All circuits are stopped with a normal
shutdown precedure.
Bell icon is moving on controller’s
display.
String in the alarm list:
UnitOffAmbTempSen
String in the alarm log:
UnitOffAmbTempSen
String in the alarm snapshot
UnitOffAmbTempSen
Sensor is broken.
Check for sensor integrity.
Check correct sensors operation
according table and allowed kOhm
(k) range.
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 Unit Rapid Stop Alarms
5.3.1 Condenser 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:
UnitOffCondWaterTmpLo
String in the alarm log:
UnitOffCondWaterTmpLo
String in the alarm snapshot
UnitOffCondWaterTmpLo
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.
Refrigerant temperature become too low
(< -0.6 °C).
Check the water flow and filter. No good
heat exchange condition into the
evaporator.
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 condenser
has any damage due to this 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 |
