Handleiding
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EWWQ090G ÷ EWWQ720L - R410a - Water-cooled scroll chillers
EWLQ090G ÷ EWLQ720L - R410a - Condenser less
EWHQ100G ÷ EWHQ400G - R410a - Heat pump scroll chillers
EWAQ- - R410a - Air-cooled scroll chillers
EWAQ-G - R410a - Air-cooled scroll chillers
EWYQ- - R410a - Air-cooled scroll heat pumps
Air and Water cooled scroll chillers & heat pump
Operation
Manual
Operation Manual
62
EWWQ - EWLQ - EWHQ
EWAQ - EWYQ
Air or Water cooled scroll chiller &
heat pump
D-EOMHW00106-15EN
Symptom
Cause
Solution
Unit status is Auto.
The circuit is stopped immediately.
Bell icon is moving on controller’s
display.
Led on the button 2 of External HMI is
blinking
String in the alarm list:
+C*Off EXVCtrlrComFail
String in the alarm log:
C*Off EXVCtrlrComFail
String in the alarm snapshot:
C*Off EXVCtrlrComFail
Module has no power supply
Check the power supply from the
connector on the side of the module.
Check if LEDs are both green.
Check if the connector on the side is
tightly inserted in the module
Module address is not properly set
Check if module’s address is correct
referring to the wiring diagram.
Module is broken
Check if LED are on and both green.
If BSP LED is solid red replace the
module
Check if power supply is ok but LEDs
are both off. In this case replace the
module
* refers to either driver #1 or driver #2
6.1.6.2 Low Pressure alarm
This alarm is generated if the evaporating pressure drops below the Low Pressure Unload and the
control is not able to compensate 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.
Led on the button 2 of External HMI is
blinking
String in the alarm list:
+Cx Off EvapPressLo
String in the alarm log:
Cx Off EvapPressLo
String in the alarm snapshot:
Cx Off EvapPress Lo
Refrigerant charge is low.
Check sight glass on liquid line to see
if there is flash gas.
Measure sub-cooling to see if the
refrigerant charge is correct.
Protection limit not set to fit customer
application.
Check the evaporator approach and
the corresponding water temperature
setpoint 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 (W/C only).
Increase the water flow. Check the
minimum water flow for this unit.
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.
Default alarm limit not valid for the
specific plant
Adjust the low pressure alarm
settings.
Fans do not operate properly (A/C
H/P only)
Check Fans operation. Check that all
the fans can run freely and at the
proper speed.
Bekijk gratis de handleiding van Daikin EWAQ-G-SS, 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 | EWAQ-G-SS |
| Categorie | Airco |
| Taal | Nederlands |
| Grootte | 11467 MB |
