What to do if my Quantech Chiller has no display on the panel and won't operate?
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Vanessa SavageAug 10, 2025
If your Quantech Chiller's panel has no display and the unit won't operate, there could be several reasons:
1. There may be no 115 VAC to the 24 VAC Transformer. In this case, check the wiring and fuse 1FU.
2. There may be no 24 VAC to the Microboard. Check the wiring from the Control Transformer to the Microboard.
3. The Control Transformer might be defective, with no 24 VAC output. If so, replace the Control Transformer.
4. There could be a short in the wire to the temperature sensors or pressure transducers. To isolate this, unplug the connections at the IPU II & I/O Board.
5. The IPU II & I/O Board or the Display Board might be defective. Contact Quantech Service before replacing circuit Boards!
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Jesus BakerAug 17, 2025
Why does my Quantech QTC3150THE Chiller show a high discharge pressure fault?
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xshermanAug 17, 2025
A high discharge pressure fault in your Quantech Chiller can occur due to several reasons:
1. The condenser fans might not be operating or are operating backwards. Check the fan motor and contactors, and ensure the fan blows air upwards.
2. There might be too much refrigerant in the system. If so, remove some refrigerant.
3. There could be air in the refrigerant system. In this case, evacuate and recharge the system.
4. The discharge pressure transducer might be defective. Replace the discharge pressure transducer.
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Stephanie HarrisAug 25, 2025
What to do if my Quantech Chiller shows a low suction pressure fault?
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Jennifer MillerAug 25, 2025
A low suction pressure fault in your Quantech Chiller may arise due to:
1. Improper suction pressure cutouts adjustments. Adjust per recommended settings.
2. Low refrigerant charge. Repair the leak if necessary and add refrigerant.
3. Fouled filter dryer. Change the dryer/core.
4. Defective TXV. Replace the TXV.
5. Reduced flow of chilled liquid through the cooler. Check GPM, check operation of pump, clean pump strainer, purge chilled liquid system of air.
6. Defective suction pressure transducer/low pressure switch or wiring. Replace transducer/low pressure switch or faulty switch or wiring.
7. Defective LLSV. Replace the LLSV.
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Amber HowardAug 31, 2025
How to fix a Flow Switch/Remote Stop no run permissive on Quantech Chiller?
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Samuel WilkinsAug 31, 2025
If your Quantech Chiller displays a Flow Switch/Remote Stop no run permissive, consider these potential causes:
1. There may be no chilled liquid flow. Check the chilled liquid flow.
2. The flow switch might be improperly installed. Ensure the flow switch is installed according to the manufacturer’s instructions.
3. The flow switch itself could be defective. Replace the flow switch.
4. The remote cycling device might be open. Check cycling devices connected to terminals 13 and 14 of the XTBC1 Terminal Block.
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