177
Diagnostics and Troubleshooting
*Additional information at end of section
Error/Message Description Cause/Solution/Troubleshoot
E.ENCC
Error Encoder
Interface
Loss of encoder
channel or
communication
between encoder
and drive for an
absolute encoder.
This error should be accompanied with further
information describing the nature of the fault. Refer to
2.LF.26 Encoder Status for further details.
E.BUS
Error HSP5
Serial Com.
This message
indicates
that serial
communication
between the
keypad operator
and the drive or
the drive and the
elevator control
has been lost
(See parameter
US.29 Ser.Com
Watchdog Time to
bypass this fault).
Verify keypad operator is seated properly to the
inverter.
Verify connection of the serial comm. to the keypad
operator at port X6C.
Verify there are no bent or missing pins where the
serial comm. cable from the controller plugs into the
keypad operator.
Verify serial comm. between controller and drive.
Verify connection of keypad operator and inverter control
card.
Verify there are no bent or missing pins where the
keypad operator connects to the control card.
E.Br
Error Low
Motor Current
Error current
check.
Prior to every run
the drive sends
current to each
phase of the
motor to verify
the connection.
Afterward, the
drive applies
magnetizing
current (Induction
Motors) and
monitors whether
the motor is
magnetized or not.
Possible causes for low motor current error during
current check:
Motor contactor contacts are burnt or damaged.
Bypass motor contactor (do not simply jumper!)
to test and replace as needed.
One or more motor leads is not connected.
Motor contactor is not closing or not closing in time
Bypass motor contactor or verify switching time.
Motor windings are damaged.
Measure motor resistance.
The phase current check can be bypassed by setting
US.25 = 0
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