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Although the factory fan is durable, some common malfunctions may still occur during long-term use. The following is an analysis of the causes and solutions for typical faults, for reference in daily maintenance:
1、 The fan does not start/cannot operate
Possible reasons and handling steps:
power issue
Key inspection points: whether the socket is powered on, whether the circuit breaker is tripped, and whether the cable is damaged.
Solution: Use a multimeter to test the voltage (380V/220V is normal), reset the circuit breaker or replace the cable.
Motor failure
Key inspection points: Check for burnt smell and abnormal noise in the motor, and check for bulging capacitors (single-phase motor).
Solution: Replace the capacitor (cost about 50 yuan) or contact the manufacturer to repair the motor (requires professional electrician operation).
Control system malfunction
Key inspection points: Check if the speed regulator and remote control are malfunctioning, and if the circuit connectors are oxidized.
Solution: Restart the controller, clean the connectors, or replace the control module.
2、 Fan shaking/shaking abnormally
Possible reasons and handling steps:
Fan blade deformation or weight imbalance
Key inspection points: visually check if the fan blades are bent, and observe the amplitude of the swing during operation.
Solution: Manually adjust the fan blade angle after shutdown (requires level calibration), and replace the fan blades if they are severely deformed (aviation aluminum material costs about 2000 yuan/piece).
Loose installation
Key inspection points: Check if the suspension bracket screws and expansion bolts are loose.
Solution: Tighten all bolts (it is recommended to use anti loosening washers), and check the welding points of the steel structure roof.
Bearing wear
Key inspection points: Listen for any "clicking" noise from the motor bearings, and manually rotate the fan blades to check for any jamming.
Solution: Add high-temperature lubricating grease (such as lithium based grease), and replace the bearings due to severe wear (cost approximately 300-500 yuan).
3、 Excessive noise
Possible reasons and handling steps:
Mechanical friction
Key inspection points: collision between fan blades and protective nets, lack of oil in motor bearings.
Solution: Adjust the spacing between the protective nets (at least 10cm) and lubricate the bearings.
Structural resonance
Key points for inspection: The frequency of the fan coincides with the natural frequency of the steel structure in the factory building.
Solution: Install rubber shock absorbers or adjust the fan speed to avoid resonance points.
Motor aging
Key points for inspection: The running noise gradually increases over time.
Solution: Contact the manufacturer for maintenance or replacement of the motor (usually with a lifespan of over 10 years).
4、 Decreased wind speed/insufficient air volume
Possible reasons and handling steps:
Dust accumulation on fan blades
Key points for inspection: The surface of the fan blades is covered with oil stains and dust (commonly found in spray painting workshops).
Solution: Wipe with neutral cleaner after shutdown (high-pressure water gun flushing is prohibited).
Voltage fluctuation
Key inspection points: Use a multimeter to check if the operating voltage is below 10% of the rated value.
Solution: Install a voltage regulator or inspect the circuit load in the factory area.
Loose belt (some models)
Key inspection points: Check if the belt is slipping or broken.
Solution: Adjust the tensioner or replace the belt (synchronous belt costs about 100 yuan).
5、 Leakage or short circuit
Possible reasons and handling steps:
Line damage
Key inspection points: Check if the cable skin is worn (especially at the roof threading area).
Solution: Temporarily wrap with insulating tape, and replace the entire line for a long time.
The motor is damp
Key points for inspection: Sudden electrical leakage during rainy season or after washing the environment.
Solution: After power failure, use a hair dryer to dry at low temperature. In severe cases, replace the motor.
poor grounding
Key points for inspection: Use a grounding resistance tester to measure the resistance value (should be less than 4 Ω).
Solution: Reconnect the grounding wire and if necessary, deeply bury the grounding stake.
6、 Automatic shutdown protection
Possible reasons and handling steps:
overheat protection
Key points for inspection: Motor temperature>80 ℃ (risk of burns from hand contact).
Solution: Stop cooling for 1 hour and check if the heat dissipation holes are blocked.
overload protection
Key inspection points: whether it has been running continuously for more than 12 hours or the voltage is too high.
Solution: Reduce continuous operation time and install overload protectors.
7、 Preventive maintenance recommendations
Monthly inspection:
Tighten screws, clean fan blades, and test controller sensitivity.
Annual maintenance:
Replace the bearing grease (high-temperature model) and conduct a comprehensive inspection of the cable insulation.
Environmental adaptation:
Install dust covers in the dust workshop and use IP65 protective motors in humid environments.
Fault Quick Check Table
Priority troubleshooting points for fault phenomena and emergency handling methods
Do not start the power supply → capacitor → check the circuit after the motor is powered off
Vigorously shake the fan blades to balance → Install bolts and immediately stop the machine to prevent falling
Abnormal noise bearing → protective mesh spacing lubrication or adjustment spacing
Leakage cable damaged → grounding wire disconnected and warning sign hung
Precautions
⚠️ High altitude operations must wear safety belts and live repairs are prohibited!
🔌 It is recommended to have a certified electrician handle circuit issues.
📞 Priority should be given to contacting the manufacturer during the warranty period (unauthorized disassembly may result in loss of warranty eligibility).
By regular maintenance and quick response to minor faults, the lifespan of the fan can be significantly extended (up to 15 years). If the problem is complex, it is recommended to contact professional service providers (such as Da Mu Men, HVLS Fan, and other brand after-sales).
