Quick Troubleshooting Steps
Follow these steps before servicing any components:
Identify the symptom: over-current trip, high-pressure trip, temperature instability.
Locate the component: determine which circuit or protector triggered.
Reset first: Press the reset button on the overload or high-pressure switch.
Inspect deeper: if resetting fails, check fan, motor, or protector condition and replace or repair as needed.
Note: Always de-energize before servicing. If trips persist, contact a qualified technician to inspect refrigerant and system integrity.
Common Faults & Remedies
| # | Fault | Remedy |
|---|---|---|
| 1 | First circuit over-current trip | Reset the electromagnetic valve overload protector in the distributionbox. |
| 2 | First circuit high-pressure trip | Remove the lower cover, locate the high-pressure switch, press reset. |
| 3 | Second circuit over-current trip | Reset the second electromagnetic valve overload protector. |
| 4 | Second circuit high-pressure trip | Open cover, locate second high-pressure switch, press reset. |
| 5 | Fan motor failure | Ensure fan spins freely; replace motor if burnt out. |
| 6 | Humidifier over-temp protection | Check protector setting; realign or reset to recommended level. |
| 7 | Power phase error | Confirm correct phase wiring; repair any broken conductors. |
| 8 | Internal over-temperature | Inspect over-temp protector; replace if faulty. |
Technical Insights
Over-current Protection
Prevents compressor damage by cutting power on excessive start-up current. Use soft-starters or clean filters to reduce inrush.
High-pressure Protection
Shuts down the system on excessive condenser pressure. Keep the condenser clean and well-ventilated to maintain proper head pressure.
Temperature & Humidity Control
PT100 sensors and over-temp switches ensure chamber safety. Calibrate sensors every 6–12 months for accuracy.
Phase Sequence & Power Stability
Three-phase motors require correct sequence. Install phase relays to prevent mis-wiring and test interruptions.
