Why does the constant temperature and humidity test box suddenly alarm

1. Temperature system

1. Sample overheating protection. When the temperature of the sample area exceeds the protection temperature set by the controller, it will stop working and alarm at the same time. Over-temperature protection is divided into upper and lower levels of protection, and can be set according to needs.

2. The temperature inside the box is too high to alarm. The sensors in the sample area and the channel are equipped with over-temperature protection devices, and there is also an over-temperature protection device on the operation panel of the constant temperature and humidity test box. When the temperature of the test area exceeds the temperature set by the panel, it will stop running and at the same time Call the police.

2. Fan system

1. The fan overheated and caused an alarm. When the fan coil is overheated, a shutdown alarm will occur at the same time.

2. Fan overcurrent alarm device. When the fan current exceeds the allowable value, it will stop and alarm at the same time, and wait for the over-current troubleshooting to be completed before normal operation.

3. the refrigeration system.

1. Power failure, phase sequence alarm, power failure. When the equipment lacks phase or external power supply, or the phase sequence changes, it will stop working and alarm at the same time.

2. Refrigeration compressor overpressure alarm device. If the refrigerant pressure exceeds the set value, the refrigeration system will stop working and alarm at the same time. At this time, the fault must be eliminated and then reset manually.

3. The refrigeration compressor overheating alarm device. When the compressor coil is overheated and the line power supply is abnormal, it will stop and alarm at the same time.

4. Circulating cooling water shortage alarm device. When the water pressure of the cooling circulating water system is insufficient, a shutdown alarm will occur at the same time. After the fault is eliminated, the cooling water can be reset before normal operation.