User`s manual

FP5/GP5 User’s Manual 89
Fault Display
When the FP5/GP5 detects a fault, the fault is displayed on the digital
operator and a fault contact output is activated after which the motor coasts
to a stop. Check the causes listed in the table below and take the corre-
sponding corrective actions. To reset the inverter, remove any run command
and apply the reset input signal or depress the RESET key on the digital
operator, or cycle power. If taking the corrective actions described does not
solve the problem, contact your Saftronics representative immediately.
Fault Diagnosis and Corrective Actions
LCD
Operator-
Fault
Display
Name Description Corrective Action
Uv1
Undervolt-
age 1
Main circuit undervoltage
(PUV)
Undervoltage in the DC main circuit dur-
ing running.
·Check the power supply
wiring.
·Correct the line voltage
Uv2
Undervolt-
age 2
Control circuit undervoltage
(CUV)
Undervoltage in the control circuit during
running.
Uv3
Undervolt-
age 3
MC fault
The pre-charge contactor opened during
running.
oC
Overcur-
rent
Overcurrent (OC)
The inverter output current exceeded
the OC level.
·Check the motor coil
resistance.
·Extend the accel/decel
time.
·Check the motor insula-
tion.
·Multi-meter check.
oV
Overvolt-
age
Overvoltage (OV)
The main circuit DC voltage exceeded
the OV level.
Detection level
230V class:approx. 400VDC or less
460V class:approx. 800VDC or less
Extend the deceleration
time, add braking circuit.
GF
Ground
Fault
Ground fault (GF)
Inverter output grounding current
exceeded 50% of inverter rated current.
·Check that motor insula-
tion has not deteriorated.
·Check that connection
between inverter and
motor is not damaged.
PUF
DC Bus
Fuse
Main circuit fault (PUF)
·The DC bus fuse is blown.
·The output transistors were damaged.
Check for damaged transis-
tor, load side short circuit,
grounding, etc.
Chapter 4 - Diagnostics
Alarm & Fault Displays
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