5 Trouble shooting
VFD700 Solar pump inverter user manual 53
Trip Code
Trip Description
Possible Reasons
Corrective Actions
F037
Over current during
power up
Turn off IGBTs, can
not reset
Earth fault or current
sense circuit failure
Check the output cabling and
motor;
Contact service
F038
Wrong drive model
Turn off IGBTs, can
not reset
Internal fault
Contact service
F039
Inner thermister
failed
Turn off IGBTs, can
not reset
IGBT damaged
Contact service
F040
Software abnormal
Turn off IGBTs, can
not reset
Software running
wrong
Contact service
MCU or DSP failed
Contact service
F041
Watchdog failure
Turn off IGBTs, can
not reset
Software wrong
Contact service
MCU or DSP failed
Contact service
F042
Reserved
−
−
F043
EEPROM internal
fault
Turn off IGBTs, can
not reset
MCU or DSP failed
Contact service
EEPROM failed
Contact service
All above trips can be categorized into 4 types, details in table 5-2:
Table 5-2 Fault category
Type
Trips
Description
Auto reset
F003
F003 (under voltage), can auto reset the drive base on the
actual DC bus voltage
Can not reset
≥F030
Fault from inner failure (except external disturbance).
EEPROM
read & write
F020
When the trip happens, can load default, and then reset the
drive.
Odinary trip
F001, F006
can reset after 10s when trip removed
Other trips
can reset after 1s when trip removed
