Defective treatment of high and low temperature damp heat test box

For the user, the failure of the high-low temperature damp heat test chamber is a very big matter. When the production is quite urgent, the high-low temperature damp heat test box fails, and the equipment maintenance personnel cannot arrive in time. A considerable loss. Therefore, it is necessary to learn some conventional high and low temperature damp heat test box repair techniques.

The following are the common faults and treatment methods listed by the staff of Kunshan Haida Instrument for your reference:

Fault phenomenon

Cause

Approach

Over temperature

Solid state relay path, meter out of control

Replace solid state, adjust parameters

Overpressure

High ambient temperature, too much refrigerant

Reduce the ambient temperature and release the refrigerant

overload

Overload protector bad, excessive current

Replace the overload protector and check the cooling circuit

Underphase/Inverter

Invalid phase or three-phase sequence of incoming line, phase sequence relay is bad

Check incoming power, replace phase sequence relay, adjust three-phase sequence

Do not warm up

Solid state relays open, bad heating tubes

Change the status or heating tube

Not thermostatic

Instrument PID chaos, sensor bad

Adjust PID parameters and replace sensors

Do not cool down

Solid state relay path, less refrigerant

Change the status or add refrigerant

Press the power switch does not work

Main power circuit breaker did not close

Switch off the main power circuit breaker

Instrument shows "Err"

Sensor failure, temperature out of display range

Replace the sensor and adjust the range of the instrument

Illumination is off

Switch bad, light bulb bad

Replace switch or bulb

The compressor does not move

Refrigeration switch not pressed, overheat protection

Press the refrigeration switch or wait for the compressor to cool down completely

Drain water inside tank

High water level

Turn down the small box in the electric control cabinet

Slow heating

The fan is not turning, the door is not closed, the load is too much

Press the heater switch or check the fan to close the door and reduce the load