Daikin EWAT_B - Cmpx Protection - Compressor Protection

EWAT_B
Operating Manual
37/38
Symptom
Cause
Solution
Circuit status is Off.
No indications on the screen
String in the alarm list:
--
String in the alarm log:
 Cx FailedPumpdown
String in the alarm snapshot
Cx FailedPumpdown
EEXV is not closing completely, therefore
there’s “short-circuit” between high
pressure side with low pressure side of the
circuit.
Check for proper operation and full closing
position of EEXV. Sight glass should not
show refrigerant flow after the valve is
closed.
Check LED on the top of the valve, C LED
should be solid green. If both LED are
blinking alternately the valve motor is not
properly connected.
Evaporating pressure sensor is not
working properly.
Check for proper operation of evaporating
pressure sensor.
Compressor on circuit is internally
damaged with a mechanical problems for
example on internal check-valve, or on
internal spirals or vanes.
Check compressors on circuits.
Reset
Local HMI
Network
Auto



5.5.10 CmpX Protection – Compressor Protection
This alarm is generated when the compressor internal protection trips
Symptom
Cause
Solution
Compressor X is Off
Bell icon is moving on controller’s display.
String in the alarm list:
CmpX Protection
String in the alarm log:
 CmpX Protection
String in the alarm snapshot
CmpX Protection
Compressor motor PTC.
Compressor discharge port PTC.
Compressors is damaged
Compressor is working out of its operating
limits
Reset
Local HMI
Network
Auto


