Blue Box ZETA 2002 3,2

Questions and Answers

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Robert OwensAug 26, 2025
What to do if compressor 1 and/or 2 are not working on my Blue Box ZETA 2002 3,2 Chiller (display On with alarm “C1” and/or “C2”)?
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  Amy ChavezAug 26, 2025
  If your Blue Box Chiller's compressor 1 and/or 2 are not working, and the display shows alarm “C1” and/or “C2”, it could be due to a few reasons. There might be insufficient refrigerant charge, so you should find the leak with a leak detector, repair it, and recharge the circuit. Another possibility is a locked 4-way valve, which would need to be replaced. Additionally, a lack of oil could be the issue. Check the quantity of oil in the circuit and replenish as necessary. Also, ensure that the circuit has all the necessary measures to ensure oil return to the compressor.
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davisjoanAug 27, 2025
Why is there ice on the liquid refrigerant pipe of my Blue Box Chiller?
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  Amanda HarrisAug 27, 2025
  If ice is forming on the liquid refrigerant pipe of your Blue Box Chiller, it could be due to a clogged liquid refrigerant filter, which should be replaced. Alternatively, the valve on the liquid refrigerant line (if present) may not be completely open, so ensure that it is fully opened.
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Troy MonroeAug 29, 2025
Why are the compressors running constantly on my Blue Box ZETA 2002 3,2 Chiller?
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  Donna BryantAug 30, 2025
  If the compressors on your Blue Box Chiller are running constantly, this could be due to several reasons. The operating thermostat might be incorrectly set or faulty, so check the setting and replace the thermostat if necessary. Another cause could be a lack of refrigerant gas charge, so check and recharge if needed. Additionally, an excess thermal load could be the reason, in which case you should reduce the thermal load.
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Jared WillisAug 31, 2025
What does it mean when my Blue Box Chiller's display is On with alarm "E3" or "E5", but the compressor isn't running and the fans are?
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  Dr. Heidi GoldenSep 1, 2025
  If the display of your Blue Box Chiller is on with alarm "E3" or "E5" and the compressor is not running while the fans are, it could be due to a few reasons. The resistance RK3 or RK4 might be faulty or disconnected, so check the resistance and replace it if necessary. Another cause could be interrupted connections to the pressure sensor (only on the HP version or if condensation pressure control with fan speed regulator is fitted), so restore the correct connections to the pressure sensor ("E3" refers to compressor 1, "E5" refers to compressor 2). Lastly, the pressure sensor itself might be faulty (only on the HP version or if condensation pressure control with fan speed regulator is fitted), so replace the pressure sensor ("E3" refers to compressor 1, "E5" refers to compressor 2).
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Tanner RandolphSep 3, 2025
What to do if the display of my Blue Box Chiller is On with alarm “E1”, the compressor is not running, and the fans are stopped?
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  Michael AllenSep 3, 2025
  If the display of your Blue Box Chiller is on with alarm “E1” and the compressor is not running while the fans are stopped, it could be due to a couple of reasons. The connections to the evaporator inlet temperature sensor might be interrupted, so restore the correct connection of the temperature sensor. Alternatively, the evaporator inlet temperature sensor itself might be faulty, requiring you to replace the temperature sensor.
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James ThompsonSep 5, 2025
What does it mean when the display of my Blue Box ZETA 2002 3,2 is On with alarm “A1”, the compressor is not running, and the fans are stopped?
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  Kelsey JohnsonSep 5, 2025
  If the display of your Blue Box Chiller is on with alarm “A1” and the compressor is not running while the fans are stopped, it could be due to a couple of reasons related to the defrost thermostat. There might be no consent from the defrost thermostat due to an insufficient water flow rate, so check the hydraulic circuit and wait until the water temperature exceeds the value necessary for the unit to restart. Alternatively, there might be no consent from the defrost thermostat due to an insufficient glycol concentration, meaning the programmed set-point is too low for the percentage of glycol in the circuit. Increase the glycol percentage and reduce the defrost set-point.
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Natalie SampsonSep 7, 2025
What does it mean if the display of my Blue Box ZETA 2002 3,2 Chiller is On with alarm “F1” or “F2”, the compressor is not running, and the fans are stopped?
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  Tony MayerSep 7, 2025
  If the display of your Blue Box Chiller is on with alarm “F1” or “F2” and the compressor is not running while the fans are stopped, it could be due to fan thermal protection intervention. Check the insulation between windings and between windings and earth; replace the fan if necessary.
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Sheila EdwardsSep 9, 2025
What does it mean if the display of my Blue Box Chiller is On with alarm “FL”, the compressor is not running, and the fans are stopped?
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  rwilsonSep 9, 2025
  If the display of your Blue Box Chiller is on with alarm “FL” and the compressor is not running while the fans are stopped, it could be due to a couple of reasons. There might be no water flow at the evaporator, so check the hydraulic system. Alternatively, the flow switch might be faulty, so check the contact of the flow switch and replace it if necessary.
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Nicole ChenSep 12, 2025
Why is there ice on the coil of my Blue Box ZETA 2002 3,2, and the display shows warning message “r1”?
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  Angela RosalesSep 12, 2025
  If ice is forming on the coil of your Blue Box Chiller while compressor 1 and/or 2 are running and the display shows warning message “r1”, it is likely due to an insufficient refrigerant charge. To resolve this, find the leak with a leak detector, repair it, and recharge the circuit.
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cooperjohnNov 18, 2025
Why is my Blue Box ZETA 2002 3,2 Chiller running with insufficient capacity?
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  Benjamin NelsonNov 18, 2025
  If the Blue Box Chiller unit runs with insufficient capacity, it could be due to several reasons. There might be an insufficient refrigerant charge, requiring you to check the refrigerant circuits with a leak detector, repair any leaks, and recharge the circuit. Alternatively, there might be moisture in the refrigerant circuit, in which case you should replace the refrigerant filter and, if necessary, dehydrate and recharge the circuit. Another possibility is that one compressor fails to start. If the power circuit is open and the compressor contactor is energized, find and eliminate the cause of the protection intervention and change the fuses. If the fuses blow immediately, replace the compressor. If a compressor fails to start, the fuses are OK, and the compressor contactor is de-energi...