Malfunctions with Indications 2-29
CP-65 Phase Out of
Spec (Soft)
The incoming three-phase AC lines do not have the
correct 120 degrees phase relationship between
them. A coast stop will be initiated.
Check the phase relationships of the AC lines. Verify that
they are 120 degrees out of phase and are stable and free
from noise. If they appear correct execute a CLEAR FAULT
and attempt normal operation. If the fault reoccurs, replace
Main Control Board.
CP-66 Firing Sequence
(Soft)
Internal hardware error detected. A coast stop will
be initiated.
Execute a CLEAR FAULT and attempt normal operation. If
the fault reoccurs, replace Main Control Board.
CP-90 SCR Test Arm
Voltage (Soft)
This fault indicates that excessive armature voltage
existed prior to execution of the SCR test routine.
The test was aborted due to the possibility of
excessive armature currents being produced during
the tests.
This fault usually indicates that excessive armature voltage
existed due to motor rotation prior to the test. Before
executing a SYSTEM RESET or cycling power, the motor
should be brought to rest (zero velocity). After the motor
comes to rest, execute a SYSTEM RESET and continue
operation. If the fault reoccurs, measure the armature
voltage at A1 and A2 on the DC contactor. If the voltage is
less than 60V for 150-300V AC drive, or 120V for 300-460V
AC drive, and the fault reoccurs, replace Main Control
Board.
CP-91 SCR Test Arm
Current (Soft)
This fault indicates that excessive armature current
existed prior to execution of the SCR test routine.
The test was aborted.
This fault indicates an internal hardware error. Execute a
Clear Fault and attempt normal operation. If the fault
reoccurs, replace Main Control Board.
CP-92 SCR Test
Aborted (Soft)
While testing for open SCR’s an abort request or
STOP command was received. The test was
aborted.
Execute a CLEAR FAULT and attempt normal operation.
CP-93 SCR Test
ECOAST (Soft)
This fault occurs if the ECOAST input is opened
while the SCR check is being done.
Close ECOAST input, execute a CLEAR FAULT and attempt
normal operation.
CP-94 Armature
Voltage
Reversed (Soft)
The open SCR test detected that the internal
armature voltage sense circuit has the wrong
polarity due to an internal wiring problem.
The armature bridge voltage sense polarity is checked
during the maximum discontinuous current test. The
armature bridge voltage is measured repeatedly for 15
degrees after an SCR pair is fired to check if the armature
voltage is the correct polarity. The measured armature
voltage has to exceed a nominal voltage (±25V) and be
positive (negative) when the forward (reverse) bridge is
selected for at least three samples. Otherwise there is a
hardware problem and fault CP-94, Armature Voltage
Reversed is reported. Contact Factory Service Technician,
to repair internal wiring problem.
CP-96 AC Line
Unbalance (Soft)
This fault indicates that the three phases of AC line
voltage were detected as unbalanced during the
Autotune function. Armature current ripple
exceeded 12.5% of FLA of the motor. A 10% line
voltage imbalance between phases is the maximum
allowed.
If the maximum discontinuous current test was executed
successfully, the current balance test is executed. The
mean current of the last six current pulses from the
maximum discontinuous current test is used to determine if
the AC line is balanced. If the minimum and maximum
current pulses are less than 1%, then fault CP-97 Line
Balance Test is reported. And if the difference between the
minimum and maximum current pulses vary by more than
12.5% of full load current, then fault CP-96 is reported.
The fault is due to an imbalance in the three-phase
incoming voltage supply. Monitor the incoming three-phase
voltage and if an imbalance is observed prior to/or during
normal operation, correct it before attempting to continue.
Execute a CLEAR FAULT to resume operation.
CP-97 Line Balance
Test (Soft)
This fault indicates an internal error was detected
during the AC Line Balance test.
Execute a CLEAR FAULT and attempt normal operation. If
the fault reoccurs, replace Main Control Board.
Current Processor Faults
No. Name Description Recovery
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