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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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