Guanding Industrial Oven Temperature Fault Troubleshooting Guide

Guanding Industrial Oven Temperature Fault Troubleshooting Guide

In industrial production, ovens and industrial baking equipment act as rigorous "temperature craftsmen," precisely controlling the critical processes of material drying and curing. However, during long-term high-intensity operation, equipment may experience temperature anomalies due to component aging, parameter deviation, or environmental influences. With over a decade of experience in industrial heating equipment, Guanding Industrial Equipment analyzes the underlying logic and troubleshooting methods for temperature faults, helping you quickly locate issues and resume production.

Temperature Soaring: Warning Signals from the Air Circulation System

When an oven shows rapid temperature rise or even over-temperature alarms, the first focus should be on the operation status of the air circulation system. As the "guardian" of oven temperature uniformity, if the air circulation motor experiences 卡顿 (stuck operation) or abnormal speed, it will cause hot air to fail to circulate effectively, leading to sudden local temperature spikes. Guanding's engineers have found in on-site inspections that about 30% of temperature soaring cases are due to insufficient lubrication of motor bearings or dust-induced imbalance of fan blades. In such cases, the motor should be stopped to check for operating noise and vibration amplitude, and bearing lubrication or fan blade cleaning should be performed if necessary. If the motor runs normally but still makes unusual noises, it may indicate loose fixing screws of the wind wheel, requiring professional tightening and adjustment.

Slow Heating: In-depth Diagnosis of Heat Exchange Efficiency

Slow temperature rise often signals an "efficiency alarm" from the heat exchange system. The air circulation adjustment damper of the oven acts as a "control valve" for heat flow. If it gets stuck or has insufficient opening due to long-term use, the hot air circulation volume will decrease, reducing heat conduction efficiency. During the maintenance of an electronic component drying line, Guanding's technical team found that wear of the gear set in the damper drive motor could cause the actual damper opening to mismatch the set value. This "hidden fault" should be confirmed by manually moving the damper and observing the opening indicator. Additionally, aging of heating elements is another common cause—nickel-chromium alloy heating wires will form an oxide layer after long-term high-temperature use, leading to reduced heating efficiency. In this case, a multimeter should be used to check if the resistance of the heating wire is within the rated range, and overall replacement may be necessary.

Temperature Runaway: Precision Maintenance of the Control System

When the oven temperature continues to rise beyond the set value, it often indicates a functional failure in the control system. As the "nerve center" of the oven, if the solid-state relay inside the controller experiences contact adhesion due to current surges, the heating element will keep working without disconnection. Guanding's engineers recommend using the "replacement method" for troubleshooting: temporarily replace the original controller with the same model. If temperature control returns to normal, the original controller is faulty. It is important to note that over-temperature alarms may also result from deviations in temperature sensors—K-type thermocouples can generate thermoelectric potential drift in long-term high-temperature environments, causing  (distorted) temperature signals received by the temperature controller. In this case, a standard thermometer should be used to measure temperatures at multiple points inside the oven, and the sensor data should be calibrated or replaced after comparison.

OverShoot: Dynamic Optimization of PID Parameters

Severe temperature overshoot is typically a sign of mismatch between the control algorithm and equipment characteristics. The oven's PID parameters are like the "genetic sequence" of temperature control, and the combination of proportional gain, integral time, and derivative time needs to be dynamically adjusted according to the equipment's heat capacity and load characteristics. Guanding's technical team developed a "three-stage parameter optimization method," which significantly improved overshoot issues in an enterprise's aging chamber renovation: increasing the proportional gain during the heating stage to accelerate response, reducing integral time during the  (constant temperature) stage to eliminate static errors, and adjusting derivative parameters during the cooling stage to suppress oscillations. In practical operation, it is recommended to record the current parameters first, then adjust them gradually by 10% and observe the temperature curve until the ideal control effect is achieved.

Guanding Industrial's Professional Support System

Facing complex temperature faults, Guanding Industrial has established a multi-level technical support system: more than ten senior engineers can provide remote fault prediction, quickly locating problems through analysis of equipment operation logs; for on-site troubleshooting, 24-hour door-to-door service is available in the Yangtze River Delta region. We always advise users to establish an "equipment health file," recording the occurrence conditions, fault phenomena, and solutions for each temperature anomaly. This data accumulation helps engineers more accurately identify potential hidden dangers. As Guanding's service philosophy states: "Every fault troubleshooting is an opportunity to enhance equipment efficiency," and we look forward to helping you continuously optimize your production process through professional technology.

The temperature control of industrial heating equipment balances process precision and production efficiency. Guanding Industrial Equipment is committed to transforming fault troubleshooting into an opportunity for technological upgrading. For more oven maintenance materials or to schedule an engineer for on-site diagnosis, please call Guanding's technical service center. We will safeguard your production with our deep industry experience.