Daikin EWWH455DZXSA2 [38/47] This alarm indicates a gas leakage in the compressor box

Daikin EWWHC11DZXSA3 [38/47] This alarm indicates a gas leakage in the compressor box
D-EOMWC01405-18EN
38/47
EWWD_DZ EWWH_DZ
6.5 Circuit Pumpdown Stop Alarms
6.5.1 Gas Leakage fault (A/C units only)
This alarm indicates a gas leakage in the compressor box.
Symptom
Cause
Solution
Circuit status is Off.
The circuit is switched off with the
shutdown procedure performing a deep
pumpdown of the circuit.
Bell icon is moving on controller’s display.
String in the alarm list:
Cx OffGasLeakage
String in the alarm log:
Cx OffGasLeakage
String in the alarm snapshot
Cx OffGasLeakage
Gas leakage in the compressors box (A/C
units).
Switch off the unit and perform a gas
leakage test.
Gas Leakage in the plant room.
Check if there are leakage on the unit with
a detector eventually starting suction fans
to change the air in the room.
Gas leakage sensor fault.
Put the sensor in open air and check that
the alarm can be cleared. In case replace
the sensor or disable the option before
getting a new part.
Reset
Notes
Local HMI
Network
Auto
6.5.2 High Compressor Vfd Temperature fault (A/C units only)
This alarm is generated to indicate that the Vfd temperature is too high to allow the compressor to run.
Symptom
Solution
Circuit status is Off.
The circuit is switched off with the normal
shutdown procedure.
Bell icon is moving on controller’s display.
String in the alarm list:
CxCmp1 VfdOverTemp
String in the alarm log:
CxCmp1 VfdOverTemp
String in the alarm snapshot
CxCmp1 VfdOverTemp
Check electrical connection of the solenoid
valve.
Check refrigerant charge. Low refrigerant
charge can cause overheating of the Vfd
electronic.
Check for obstructions in the pipe.
Check if Vfd heater is switched off when
the Vfd temperature increases.
Check if the contactor that commands the
Vfd heater can switch propertly.
Reset
Notes
Local HMI
Network
Auto
6.5.3 Liquid Temperature Sensor fault (W/C units only)
This alarm is generated to indicate that the sensor is not reading properly.
Symptom
Cause
Solution
Circuit status is Off.
The circuit is switched off with the normal
shutdown procedure.
Bell icon is moving on controller’s display.
String in the alarm list:
CxCmp1 OffLiquidTempSen
String in the alarm log:
CxCmp1 OffLiquidTempSen
String in the alarm snapshot
CxCmp1 OffLiquidTempSen
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 properly 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.
Reset
Notes
Local HMI
Network
Auto

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