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A chiller may not work as well as a new one over time and its performance can degrade because of the lone use, even with a proper operation and regular maintenance. So what are common problems of a chiller and how to troubleshoot them? Let’s discuss it in the following.
Chiller Troubleshooting: Common Problems
| Fault | Cause | Solution |
| 1. Switch on the power supply, the device doesn’t work. | A. Power plug isn’t inserted. B. Power socket has no power. C. Power grid stops supplying power. D. Fuse is burned. | A. Plug in the power plug. B. Check socket. C. Wait power supply. D. Replace fuse. |
| 2. Switch on the stirring rotary knob, the stirrer can’t rotate. | A. The rotary speed is too low. B. Stirrer is stuck. C. Stirring motor is broken. D. Temperature is over 80℃, making magnet loose magnetic force. | A. Increase the rotary speed of the motor B. Put stirrer on proper place C. Replace motor D. Control temperature below 40℃ |
| 3. The display of the gauge is abnormal. | A. Ligature is loose. B. Platinum resistor turns off breaks or shorts circuit. C. The instrument gauge has fault. | A. Check ligature B. Replace platinum resistor C. Check and repair the instrument gauge |
| 4. The figures flash. | A. Large power interference. B. The instrument gauge has fault. | A. Remove interference, and use stable power source B. Check and repair instrument gauge |
| 5. No heat | A. Heat setting is lower. B. Contactor is bad. C. Heater is bad. D. The instrument gauge has fault. E. Ligature is loose. | A. Set it to needed value B. Correct contactor C. Replace heater D. Check and repair instrument meter E. Examine ligature |
| 6. There has heat all the time, without temperature control. | A. Heat setting is higher. B. The instrument gauge has fault. | A. Set it to needed value B. Check and repair instrument meter |
| 7. Shell of machine has electricity. | A. Protective earthing is bad. B. Other circuits fall off. C. Insulating property of heater is unsteady. | A. Joint protective earthing wire B. Examine circuits C. Replace heater |
| 8. No refrigeration | A. Didn’t turn on refrigeration switch B. Condensate fan doesn’t rotate. C. Compressor doesn’t start. D. Freon leaks. | A. Turn on refrigeration switch B. Replace fan C. Examine circuits and compressor D. Repair Freon after examine leak, and then test machine |
| 9. It has refrigeration, But temperature decreases slowly. | A. Freon leaks. B. Condensate fan doesn’t run. C. Magnetic stirring doesn’t run. D. Capillary or circuit is blocked. | A. Turn on refrigeration switch B. Replace fan C. Examine circuits and compressor D. Remove it by high-pressure nitrogen, vacuumize after examination, make it full of Freon and test machine |
| 10. Mechanical stirring is can’t work. | A. Voltage transformation rectification system is damaged. B. Motor is damaged. | A. Examine and replace bad elements. B. Replace motor |
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