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V1.1
Fault
VFD1 Over
Current fault
VFD is measuring
excessive current to the
motor, current has
surpassed maximum
fault level.
Check wiring between motor and VFD for
incorrect or loose connections. Check drive
system for proper alignment and wear. Verify
supply voltage within tolerance. Decouple
compressor from drive motor and check for
proper manual rotation. Test motor insulation
resistance.
V1.2
Warning
VFD1 Over
Voltage warning
VFD has detected that
the DC bus voltage has
risen above the warning
limit, due to motor regen
or high input voltage
Verify supply voltage within tolerance. Motor
deceleration may be too fast and require
parameter adjustment, contact Gardner Denver
service.
V1.2
Fault
VFD1 Over
Voltage fault
VFD has detected that
the DC bus voltage has
risen above the fault
limit, due to motor regen
or high input voltage
Verify supply voltage within tolerance. Motor
deceleration may be too fast and require
parameter adjustment, contact Gardner Denver
service.
V1.3
Warning
VFD1 Earth
warning
The VFD has detected a
high level of ground
current.
Check wiring between motor and VFD for
incorrect or loose connections. Ground
connections should be checked to make sure
there is a solid connection. Inspect motor leads
and conduit for damage or wear. Test motor
insulation resistance.
V1.3
Fault
VFD1 Earth fault
The VFD has detected a
high level of ground
current.
Check wiring between motor and VFD for
incorrect or loose connections. Ground
connections should be checked to make sure
there is a solid connection. Inspect motor leads
and conduit for damage or wear. Test motor
insulation resistance.
V1.5
Fault
VFD1 Charging
Circuit fault
The VFD has detected
that the charging circuit
has faulted.
Verify package supply voltage within tolerance.
Check DC bus voltage with meter to verify voltage
level (approx. 1.414 times AC Rms input voltage).
Reset and restart compressor. If issue persists
contact Gardner Denver service.
V1.6
Fault
VFD1 Estop
fault
Emergency Stop
Pressed. E-Stop digital
input signal received.
Reset the E-Stop switch. Refer to machine
schematic and check wiring between E-Stop
contact and VFD input.
V1.7
Fault
VFD1 Saturation
Trip fault
Voltage across drive
IGBT exceeds fault limit.
Verify package supply voltage within tolerance.
Confirm DC bus voltage within tolerance when
idle and running. Contact Gardner Denver
service.
V1.9
Warning
VFD1 Under
Voltage warning
Low VFD input voltage
resulting in Low DC Bus
voltage. Below the
warning limit, nearing
fault level.
Verify package supply voltage within tolerance.
Check input wiring connections to VFD. Confirm
DC bus voltage within tolerance when idle and
running.
V1.9
Fault
VFD1 Under
Voltage fault
Low VFD input voltage
resulting in Low DC Bus
voltage. Below the fault
level.
Verify package supply voltage within tolerance.
Check input wiring connections to VFD. Confirm
DC bus voltage within tolerance when idle and
running.
V1.10
Fault
VFD1 Input
Phase fault
Input phase imbalance or
phase loss in VFD
supply
Check L-L voltage between all three phases
supplying VFD input. Investigate configuration of
3 phase system supplying compressor package,
protection may need to be disabled. Contact
Gardner Denver service.
V1.11
Fault
VFD1 Output
Phase fault
VFD has detected output
phase loss to motor
Check wiring between motor and VFD for
damaged or loose connections. Measure output
current on the leads to the compressor motor with