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F1.1
Fault
Cooler Fan Fault
input received
The cooler fan input to
the controller has faulted
and the cooler fan could
have issues with wiring
or cables from the
control box to the fan.
Check wiring and all circuits from the fan to the
controller or terminal blocks in the control box are
connected properly and there are no loose wires
or connectors. Depending on the results of the
findings, replace the fan motor if needed or
contact Gardner Denver service.
VFD Cooling Alarms
FV1.1
Warning
VFD Cooling
Over Current
Warning
VFD is measuring
excessive current to the
motor. Motor current is
approaching the fault
limit to run the
compressor.
Check wiring between fan motor and VFD for
incorrect or loose connections. Verify supply
voltage within tolerance. Check fan wheel for
proper alignment and balance. If possible,
manually spin fan wheel and observe rotation.
Test fan motor insulation resistance.
FV1.1
Fault
VFD Cooling
Over Current
Fault
VFD is measuring
excessive current to the
motor, current has
surpassed maximum
fault level.
Check wiring between fan motor and VFD for
incorrect or loose connections. Verify supply
voltage within tolerance. Check fan wheel for
proper alignment and balance. If possible,
manually spin fan wheel and observe rotation.
Test fan motor insulation resistance.
FV1.2
Warning
VFD Cooling
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. Check if
fan wheel is freewheeling when not running. Fan
deceleration may be too fast and require
parameter adjustment, contact Gardner Denver
service.
FV1.2
Fault
VFD Cooling
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. Check if
fan wheel is freewheeling when not running. Fan
deceleration may be too fast and require
parameter adjustment, contact Gardner Denver
service.
FV1.3
Warning
VFD Cooling
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.
FV1.3
Fault
VFD Cooling
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.
FV1.5
Fault
VFD Cooling
Charging Circuit
switch 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.
FV1.6
Fault
VFD Cooling
Emergency Stop
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 cooling VFD input.
FV1.7
Fault
VFD Cooling
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.
FV1.9
Warning
VFD Cooling
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.