Why Has the Compressor of the High and Low Temperature Alternating Humidity Test Chamber Stopped Working?

When troubleshooting issues with a high and low temperature alternating humidity test chamber, it is essential to first identify the root cause of the problem. This targeted approach ensures more effective resolution. For example, to address the issue of the compressor not working, we must first understand the reasons behind it.

1. Electrical Circuit Issues:
Poor circuit connections can lead to the compressor not working. Common electrical problems include:

Loose or detached wiring terminals on the compressor motor.
Poor contact of the power plug.
Loose or poor connections at the terminals of the start relay or overload protector.
Power line breakage.
All these issues can prevent the compressor from functioning properly.

2. Faulty Temperature Controller:
When the temperature controller malfunctions, such as due to leakage of the temperature-sensitive agent or severe oxidation of the contacts, the contacts may fail to close properly. This disrupts the compressor circuit, preventing normal operation.

3. Compressor-Related Issues:
The compressor itself may have problems, such as a burnt-out motor or issues with the shaft or piston. Frequent compressor starts are often caused by overcurrent in the circuit. If the start relay fails, the contacts may not release after the compressor starts, preventing the start winding from disconnecting. This results in a running current 5 times higher than normal. Additionally, poor insulation or short circuits in the compressor motor windings can increase the operating current. If the overload protector or relay does not match the compressor specifications, or if the start relay’s pull-in current or overload protector’s trip current is too low, the compressor may start too frequently.

4. Overload Protector or Start Relay Issues:
If the start relay is short-circuited or the overload protector’s heating wire is burnt out, the main circuit will be interrupted, preventing the compressor from starting.

Why Has the Compressor of the High and Low Temperature Alternating Humidity Test Chamber Stopped Working?
You can troubleshoot the issue by checking the above possible causes. Once the specific cause is identified, contact the manufacturer’s personnel for further assistance. Timely resolution of the issue will prevent delays in the normal operation of the equipment.