SUNFAR E300 SERIES 37
7 FAULT DIAGNOSIS AND COUNTERMEASURES
7.1 Protective Function and Countermeasures
Code Fault Probable Cause Solution
Fu.01
Over-current during
inverter acc
running
1. Acc time is short
2. Motor direct startup during
rotation
3. Set high for torque boost
4. Power supply volt is low
1. Prolong acc time
4. Start after motor stop
5. Decrease torque boost volt
6. Check power supply volt and
decrease power
Fu.02
Over-current during
inverter dec
running
Dec time is short Increase dec time
Fu.03
Over-current during
inverter running or
stop
1. Load occurs mutation
2. Power supply volt is low
1. Decrease load fluctuation
2. Check power supply volt
Fu.04
Over-volt during
inverter add
running
1. Input volt is high
2. Power supply is switched
on-off frequently
1. Check power supply volt
2. Decrease acc torque set
Fu.05
Over-volt during
inverter dec
running
1. Dec time is short
2. Input volt is abnormal
1. Prolong dec time
2. Check power supply volt
3. Install braking resistor or select
braking resistor again
Fu.06
Over-volt during
inverter running
1. Power supply volt is
abnormal
2. It has energy feedback load
1. Check power supply volt
2. Install braking unit, braking resistor
or select braking resistor again
Fu.07
Over-volt when
inverter stop
Power supply volt is abnormal Check power supply volt
Fu.08
Low-volt during
inverter running
1. Power supply volt is
abnormal
2. It has heavy load startup in
power net
1. Check power supply volt
2. Power supply separately
Fu.09 Reserved
Fu.10 Reserved
Fu.11
Inverter
disturbance
Wrong act due to
electromagnetism disturbance
Add absorb circuit to inverter disturbance
source
Fu.12 Inverter overload
1.Heavy load
2.Acc time is short
3.Torque boost is high
4.Power supply volt is low
1. Reduce load or change for higher
power range inverter
2. Prolong acc time
3. Decrease torque boost volt
4. Check power supply volt
Fu.13 Motor overload
1.Heavy load
2.Acc time is short
3.Protection coefficient set
is low
4.Torque boost is high
1. Reduce load
2. Prolong acc time
3. Increase motor overload protection
coefficient [F2.9]
4. Decrease torque boost
Fu.14 Inverter over-heat
1.Fan duct obstruct
2.Environment temperature is
high
3.Fan damaged
1.Clear fan duct or improve ventilation
condition
2. Improve ventilation condition and
decrease carrier wave freq
3.Change fan
Fu.15
-Fu.19
Reserved
E300 Series Mini-type Integrated Universal Inverter Manual
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