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Air cooled inverter water chiller
OPERATION
MANUAL
Operation Manual
72
EWAD TZ B 160-700
Air cooled inverter water chiller
D-EOMAC00909-16EN
6.1.6.7 Gas Leakage fault
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.
Switch off the unit and perform a gas
leakage test.
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.
6.1.7 Circuit Rapid Stop Alarms
6.1.7.1 Low Pressure alarm
This alarm is generated in case the evaporating pressure drops below the Low Pressure Unload
and the control is not able to compensate to this condition.
Symptom
Cause
Solution
Circuit status is Off.
The compressor does not load
anymore or even unload, circuit is
stopped immediately.
Bell icon is moving on controller’s
display.
String in the alarm list:
CxCmp1 OffEvpPressLo
String in the alarm log:
CxCmp1 OffEvpPressLo
String in the alarm snapshot
CxCmp1 OffEvpPressLo
Transitory condition like a fan staging.
Wait until the condition is recovered
by EXV control
Refrigerant charge is low.
Check sight glass on liquid line to see
if there is flash gas.
Measure sub-cooling to see if the
charge is correct.
Protection limit not set to fit customer
application.
Check the evaporator approach and
the corresponding water temperature
to evaluate the low pressure hold
limit.
High Evaporator Approach.
Clean the evaporator
Check the quality of the fluid that
flows into heat exchanger.
Check the glycol percentage and type
(ethilenic or propilenic)
Water flow into water heat exchanger
is too low.
Increase the water flow.
Evaporating pressure transducer is
not working properly.
Check the sensor for proper operation
and calibrate the readings with a
gauge.
EEXV is not working correctly.
It’s not opening enough or it’s moving
in the opposite direction.
Check if pump-down can be finished
for pressure limit reached;
Check valve movements.
Check connection to the valve driver
on the wiring diagram.
Measure the resistance of each
winding, it has to be different from 0
Ohm.
Water temperature is low
Increase inlet water temperature.
Check the low pressure safeties
settings.
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Productinformatie
| Merk | Daikin |
| Model | EWAD620TZPLB |
| Categorie | Airco |
| Taal | Nederlands |
| Grootte | 11976 MB |
