Common faults and solutions of vacuum muffle furnace

What are the common faults and solutions encountered occasionally during the use of a vacuum muffle furnace? Let’s take a detailed look below!

1. Heating malfunction
reason:
Heating element damage, such as broken resistance wire.
Circuit faults, such as blown fuses or damaged solid-state relays.
resolvent:
Check if the heating element is functioning properly, and replace it if it is damaged.
Check the circuit, repair or replace damaged fuses or solid-state relays.

2. Unstable temperature or inability to reach the set temperature
reason:
Temperature controller malfunction.
The thermocouple is damaged or the division number is inconsistent with the temperature control instrument.
Poor sealing of the furnace leads to heat loss.
Power supply issues, such as unstable voltage or phase loss in three-phase power supply.
resolvent:
Calibrate or replace the temperature controller.
Check if the thermocouple is functioning properly, replace it if damaged, and ensure that its division number matches the temperature control instrument.
Check the sealing condition of the furnace and repair it if there is any damage.
Ensure stable power supply. If the voltage is unstable, add transformers and voltage regulators. If the three-phase power supply is out of phase, conduct maintenance.

3. The furnace door is not tightly sealed
reason:
The sealing strip is aging or damaged.
resolvent:
Replace the sealing strip to ensure good sealing of the furnace door.

4. Control system malfunction
reason:
Circuit issues, such as internal switch and fuse failures in the controller.
Controller malfunction, such as abnormal display or inability to function properly.
resolvent:
Check the circuit, repair or replace damaged switches and fuses inside the controller.
If the controller malfunction is severe, replace the controller.

5. Overheating phenomenon
reason:
The temperature controller malfunctions, resulting in an inability to accurately control the temperature.
resolvent:
Check the thermostat and replace it if necessary.

6. Leakage problem
reason:
Insulation damage leads to current leakage.
resolvent:
Check the insulation condition and repair or replace damaged insulation components.

7. Display Exception
reason:
Display instrument malfunction, resulting in inaccurate display of temperature or other parameters.
resolvent:
Replace the display instrument to ensure accurate display.

8. Overheating of the shell
reason:
The insulation material fails, resulting in heat transfer to the shell.
resolvent:
Replace the insulation material to ensure that the shell temperature is normal.

9. Excessive noise
reason:
Loose or malfunctioning mechanical components result in noise during operation.
resolvent:
Check mechanical components, tighten loose parts or replace damaged parts.