Frequent Anomalies And Solutions - Best E5 Series User Manual

Chapter 6 Trouble Shooting Easures
6.4.5 Motor deceleration is too slow.
1. Deceleration time is set too long. Decrease deceleration time.
2. Install braking resistor.
3. Add DC braking.
6.4.6 Motor overheat.
1. Load is too big. Actual torque exceeds motor rated torque. It is recommendable to increase
motor capacity.
2. Environment temperature is too high. In environment with high temperature, motor will burn
out. Please decrease the surrounding temperature.
3. Motor inter-phase withstand voltage is not big enough.
The switching action of inverter will cause shockwave among motor winding coils. Usually the
maximum shockwave voltage may reach 3 times of inverter input power supply voltage. Please
choose the motor of which the shockwave withstand voltage is bigger than maximum
shockwave voltage.
6.4.7 When inverter starts, it interrupts other controlling devices.
1. Decrease carrier wave frequency and decrease inside switching action.
2. Install noise filter on inverter power supply input side.
3. Install noise filter on inverter output side.
4. Ground the inverter and motor correctly.
5. Put on metal tube outside the wire for shielding.
6. Wire main loop and control loop separately.
6.4.8 Inverter overcurrent stall is detected while fan is starting.
1. Fan is in idle state while starting. Please set starting DC braking.
2. If starting DC braking is set, please increase DC braking value.
6.4.9 Mechanical vibration or roar.
1. Vibration frequency in mechanical system and carrier wave cause resonance. Adjust
carrier wave to avoid resonance point.
2. Vibration frequency in mechanical system and inverter output frequency cause resonance.
a.
Set hopping function to avoid resonance point.
b.
Add anti-vibration rubber on motor baseboard.

6.5 Frequent Anomalies and Solutions

Refer to below table for frequent anomalies analysis and solution
Anomalies
Keypad has no
Possible reasons and solutions
Check whether power is down, whether there is phase loss
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E5 User Manual