Core Faults and Troubleshooting of Thermal Shock Chambers

I. Temperature-related Issues

• Failure to reach set temperature: Check operation of heater/compressor, replace if damaged; calibrate sensor, replenish refrigerant if leaking; replace aging sealing strips.
• Slow shock rate: Clean air duct filter/condenser dust; inspect fan and switching valve, lubricate or replace if stuck.
•  Large temperature fluctuation: Calibrate thermostat PID parameters; reduce sample load (≤30% of chamber volume), place evenly without blocking air ducts.

II. Refrigeration-related Issues

• Slow cooling in low-temperature zone: Clean condenser fins; detect leaks and replenish refrigerant; activate defrost program or replace expansion valve.
• Frequent compressor on/off: Stabilize power supply voltage, improve equipment room ventilation; replenish refrigerant or replace refrigeration oil.
• High-pressure alarm: Clean condenser and inspect cooling fan.

III. Mechanical-related Issues

• Poor door sealing: Adjust door latch, replace aging sealing strips; calibrate chamber levelness.
• Stuck transfer mechanism: Clean guide rail debris and lubricate; calibrate position sensor.
• Abnormal noise (fan/valve): Add lubricating grease, replace worn bearings; clean valve impurities.

IV. Electrical-related Issues

• Failure to start: Reset emergency stop button, inspect power supply/air switch; rewire if grounding is poor.
• Abnormal display: Reconnect cable, test power module; restore factory settings after backing up parameters.
• Alarm code triggered: Troubleshoot per code prompt (e.g., E1 overheating: check heater/sensor); contact manufacturer for repeated alarms.

V. Key Notes

• Power off before troubleshooting; refrigeration system maintenance requires professional operation.
• Clean filter weekly, inspect seals monthly, and calibrate sensor annually.