control keypad
vacon 77
Local contacts: https://www.danfoss.com/en/contact-us/contacts-list/
7
7.3.4.2
Fault codes
The fault codes, their causes and correcting actions are presented in the table below. The shadowed
faults are A faults only. The items in white on black background are faults for which you can
program different responses in the application. See parameter group Protections.
Note! When contacting the distributor or factory because of a fault condition, always write down all
texts and codes visible on the keypad display.
Fault
code
Fault
Possible cause
Correcting measures
1
Overcurrent
S1 = Hardware
trip
S3 = Current
controller
supervision
S4 = User
configured
overcurrent
limit exceeded
Inverter has detected too high a
current (>4*I
n
) in the motor cable:
sudden heavy load increase
short circuit in motor cables
unsuitable motor
Check loading.
Check motor.
Check cables.
Make an identification run.
2
Overvoltage
S1 = Hardware
trip
S2 =
Overvoltage
control
supervision
The DC-link voltage has exceeded the
limits defined in
too short a deceleration time
high overvoltage spikes in supply
Start/Stop sequence too fast
Set the deceleration time longer.
Add a brake chopper or a brake
resistor.
Activate the overvoltage controller.
Check the input voltage.
3
Earth fault
Current measurement has detected
that the sum of motor phase current
is not zero.
insulation failure in cables or motor
Check motor cable and motor.
5
Charging
switch
The charging switch is open, when the
START command has been given.
faulty operation
component failure
Reset the fault and restart.
Should the fault re-occur, contact
the distributor near to you.
For local contacts, go to:
http://drives.danfoss.com/danfoss-
drives/local-contacts/
6
Emergency
stop
Stop signal has been given from the
option board.
Check the emergency stop circuit.
7
Saturation trip
Various causes:
component failure
brake resistor short-circuit or
overload
Cannot be reset from the keypad.
Switch off power.
DO NOT RE-CONNECT POWER!
Contact factory.
If this fault appears simultaneously
with Fault 1, check motor cables and
motor