Daikin EWAQ080DAYN User Manual

Daikin EWAQ080DAYN

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OPERATION MANUAL

EWAQ080DAYN

EWAQ100DAYN

EWAQ130DAYN

EWAQ150DAYN

EWAQ180DAYN

EWAQ210DAYN

EWAQ240DAYN

EWAQ260DAYN

Packaged air-cooled water chillers

Table of Contents

Questions and Answers:

G
griffinandrewAug 16, 2025
How to resolve incorrect superheat temperature on Daikin EWAQ080DAYN?
- A
  Ann SmithAug 16, 2025
  If the superheat temperature is too high, check if the unit has enough refrigerant, ensuring no foaming is visible in the sight glass. Also, check if the suction temperature sensor of the EEV driver is correctly placed in the holder in the suction tube and not hanging loose. If the superheat temperature is too low, verify that the EEV driver or the control motor of EEV is wired correctly and operating.
T
Teresa DavisAug 19, 2025
What does it mean if the NETWORK SAFETY alarm message shows 0U4:SW VERSION ERR on my Daikin EWAQ080DAYN Chiller?
- P
  Paul McintyreAug 19, 2025
  This message indicates that all units in the DICN system (EKACPG) do not have the same software version. Check the software version of each unit.
D
Douglas HendersonAug 22, 2025
Why is my Daikin Chiller's compressor thermal protection activated?
- K
  Kim GeorgeAug 22, 2025
  Compressor thermal protection may activate because the compressor motor coil temperature is too high, drawing excessive current without sufficient refrigerant cooling. Ensure there are no refrigerant leaks; repair any leaks and recharge the unit until no foaming is visible in the sight glass. Also, verify that the unit operates within its specified range, considering ambient and water temperatures, and ensure the compressor motor isn't locked.
G
Gregory WilsonAug 26, 2025
What causes high-pressure switch and high pressure setback in Daikin EWAQ080DAYN?
- J
  johnsondeannaAug 26, 2025
  High pressure issues in your Daikin Chiller can stem from several causes. Check that the condenser fans operate properly and turn freely, cleaning them if necessary. Ensure the condenser isn't dirty or blocked by removing any obstacles and cleaning the coil with a brush and blower. Also, the inlet air temperature of the condenser may not exceed 43°C, and verify the fan is turning in the correct direction; if not, a licensed electrician must invert two phases of the power supply to the fan motor.
J
Jose BellAug 28, 2025
What to do if my Daikin EWAQ080DAYN Chiller circuit does not start up?
- S
  Stacy NelsonAug 28, 2025
  Several factors can prevent your Daikin Chiller circuit from starting. Verify the controller setpoint for correct temperature settings. Be aware that the unit will start after approximately 15 seconds, so ensure water is flowing through the evaporator. Check the controller to ensure the unit isn't in manual mode with all compressors at 0%. Inspect the voltage on the supply panel for power supply failure. Also, inspect fuses and protection devices, replacing any blown fuses with the same size and type. Inspect connections of the field wiring and the internal wiring of the unit, tightening any loose connections. Finally, test circuits using a tester and repair any shorted or broken wires.
J
Jose LamAug 31, 2025
What causes freeze-up protection activation on my Daikin EWAQ080DAYN Chiller?
- G
  Grace KirkAug 31, 2025
  Freeze-up protection can activate due to low water flow. Increase the water flow. Another cause can be a low inlet temperature to the evaporator, so increase the inlet water temperature. Also, check the flow switch and the water pump in case the flow switch is not working or there is no water flow.
B
Brenda WilliamsonSep 3, 2025
What causes the water pressure to not be maintained in my Daikin EWAQ080DAYN?
- J
  Joseph LeeSep 3, 2025
  A leak in the water circuit can cause water pressure issues. Check for any leaks in the water circuit. Alternatively, the expansion vessel may be broken or not functioning correctly, requiring replacement.
C
christopher98Sep 6, 2025
What to do if flowswitch is activated in Daikin EWAQ080DAYN Chiller?
- J
  Jessica AcostaSep 6, 2025
  If the flowswitch is activated, it may be due to no water flow or too low water flow. Check the water pump filter and the water circuit for obstructions.
D
Daniel HughesSep 9, 2025
What causes fan overcurrent activation on my Daikin EWAQ080DAYN Chiller?
- D
  David BenderSep 9, 2025
  Fan overcurrent can be triggered by a mechanical failure where the fan is blocked. Check that the fan rotates freely. Also, it can be triggered by air flow in the unit being too low or the outdoor temperature being too high, so clean the air heat exchanger properly.
L
Larry AllenSep 12, 2025
What to do if pump interlock contact is open in Daikin EWAQ080DAYN?
- R
  Robert BoydSep 12, 2025
  Ensure a pump interlock contact is wired correctly and closed when the pump starts operating, as the pump interlock contact might not be closed.

Daikin EWAQ080DAYN Specifications

General

Model	EWAQ080DAYN
Category	Chiller
Cooling Capacity	80 kW
Refrigerant	R-410A
Compressor Type	Scroll
Power Supply	400V, 3Ph, 50Hz

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