CHINT NVF5-2.2/TS4-B - Page 97

NVF5 Series User Manual Chapter 7 Troubleshooting
Protection
interphase short circuit or
ground
short circuit
motor insulation
2、 Inverter instantaneous
overcurrent
See overcurrent handling
3、 Fan duct blockage or fan
damage
Clear the fan duct or
replace
the fan
4、High ambient temperature
Lower ambient temperature
5、 Loose I/O wiring or plug
Check wiring and re-wire
6、 Current waveform anomaly
due to output lose-phase and
other reasons`
Checking wiring
7、 Aux. power supply damage,
drive voltage undervoltage
Asking for Chint technical
support
8、 IGBT Module Damage
9、Control Board Abnormal
E.OH1
Heat Sink
Overheat
1、 High ambient temperature
Lower ambient temperature
2、 Fan duct blockage
Clear the fan duct
3、 Fan damage
Replace
the fan
4、IGBT abnormal
Asking for Chint technical
support
5、
Temperature checking circuit
error
E.OH2
Rectifier
Bridge
Overheat
1、 High ambient temperature
Lower ambient temperature
2、 Fan duct blockage
Clear the fan duct
3、 Fan damage
Replace
the fan
4、
Temperature checking circuit
error
Asking for Chint technical
support
E.OL1
Motor
Overload
1、
Incorrect Motor Overload
Ratio
Input correct motor
overload ratio
2、Motor Stall or load change
frequently
Check motor load
3、
Long time low speed ruuning
with excessive load
Select Frequency
conversion motor
4、Low grid voltage
Check grid voltage
5、 Unsuitable V / F curve
Adjust V/F cruve or adjust
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