1336 PLUS FAULT DESCRIPTIONS

1336 PLUS FAULT DESCRIPTIONS
Objectives
BULLETIN 1336 PLUS FAULT DESCRIPTIONS GUIDE provides information
to guide the user in troubleshooting the 1336 PLUS. Included is a listing and
description of the various drive faults (with possible solutions, when applicable).
Fault Descriptions
Fault Display
The LCD display is used to indicate a fault by showing a brief text statement
relating to the fault (see figure below). The fault will be displayed until a drive
reset is initiated. Refer to Table A for a listing and description of the various
faults. Table B provides a listing of faults by number.
Clearing a Fault
When a fault occurs, the cause must be corrected before the fault can be cleared.
After corrective action has been taken, simply cycling drive power will clear the
fault. Issuing a valid Stop command will also clear a fault if the [Flt Clear Mode]
parameter is set to "Disabled." In addition, a reset command can be issued
anytime from a serial device (if connected).
Contact Description
During normal operating conditions (no faults present, drive running) the CR3
fault contacts at TB2-13 & 14 are closed, and the contacts at TB2-14 & 15 are
open. When a fault occurs, the state of these contacts will change.
Name & Fault #
Description
Action
Auxiliary Fault
02
The auxiliary input interlock is
open.
If Control Interface option is
installed, check connections at
TB3. If option is not installed,
check Main Control Board jumpers
at J4 (J7 on 7.5-30 HP drives),
pins 3 & 4 and 17 & 18.
BGND 10ms Over
51
Microprocessor loop fault. Occurs
if the 10ms background task has not
been run in 15 ms.
Replace Main Control Board.
Diag C Lim Flt
36
The drive output current has
exceeded the hardware current
limit and the [Cur Lim Trip En]
parameter was enabled. Meant to
diagnose applications where hardware
current is being encountered.
Check programming of [Cur Lim
Trip En] parameter. Check for
excess load, improper DC boost
setting, DC brake volts set too high
or other causes of excess current.
EE Init Read
53
This fault occurs on power up:
- If the serial EEprom cannot be read
successfully to restore the drive
parameters or
- If the checksums on the EEprom
are not valid or
- If the drive type stored in the EEprom is
invalid.
In order to clear the fault the default
parameters should be reset and the power
to the drive should be cycled. If it is the
drive type, the problem cannot be cleared
without changing the driver board.
Note: This fault cannot be cleared. The condition
must be corrected and power cycled. This signals
a bad EEprom or a noise problem while writing to
the EEprom.
EE Init Value
54
This fault signifies that one of the drive parameters
stored in the EEprom was out of range on power up
or the drive type was invalid. The parameter number
can be found in parameter 207, Fault Data.
If it is the drive type, then the problem
cannot be cleared without changing the
driver board. In order to clear the fault the
default parameters should be reset and
power to the driver should be cycled.
Note: This fault cannot be cleared. The condition
must be corrected and the power cycled. This signals
a bad EEprom or a noise problem while writing to the
EEprom.
EE prom Fault
32
This fault will display when there is a problem
programming the serial EEprom on the Main
Check all wire and cable
connections to the Main Control
Board. Replace Main Control Board.
Fgnd 10ms Over
52
Microprocessor loop fault. Occurs if a 10ms
interrupt is pending before the current
interrupt is complete.
Replace Main Control Board.
Name & Fault #
Description
Action
Ground Short Fault
13
A current path to earth ground has
been detected at one or more of the
drive output terminals. This is a hardware
fault condition. The trip levels are solely
determined by hardware components.
(100 amps instantaneous)
Check the motor and external
wiring to the drive output terminals
for a grounded condition.
Ground Warning
57
Low level ground fault present. When the
parameter is enabled the drive will fault with
a small amount of ground current detected.
Trip level is 2 amps for 30 - 50 msec.
Check the motor and external
wiring to the drive output terminals
for a grounded condition.
Hertz Err Fault
29
This fault indicates that there is not
a valid operating frequency. It can
be caused by any of the following:
1 .[Maximum Freq] is less than
[Minimum Freq].
2. Skip frequencies and skip
bandwidth eliminate all operating
frequencies.
3. 4-20mA input signal speed reference
has been lost and [4-20mA Loss Sel] is
set for "Stop-Fault."
1. Check [Minimum Freq] and
[Maximum Freq] parameters.
2. Check [Skip Freq 1], [Skip Freq 2],
[Skip Freq 3] and [Skip Freq
Band] parameters.
3. Check for broken wires, loose
connections or transducer loss at
4-20mA input, TB2.
Hertz Sel Fault
30
A frequency select parameter has
been programmed with an out of
range value.
Reprogram [Freq Select 1 ] and/or
[Freq Select 2] with a correct value.
If problem persists, replace Main
Control Board or complete drive.
Loop Overrn Flt
23
An overrun of the 2.5ms control
loop has occurred.
Check all connections to the Power
Board. Replace the board or
complete drive as required.
Max Retries Fault
33
Drive unsuccessfully attempted to
reset a fault and resume running
for the programmed number of
[Reset/Run Tries].
Check fault buffer for fault code
requiring reset. Correct the cause
of the fault and manually clear by
pressing the local Stop key or
cycling the TB3 Stop input.
Motor Mode Flt
24
A fault has been detected originating from
the Control Board. This fault will occur if
the value in the motor Mode parameter gets
written to an invalid value.
Check parameter programming. Check
all connections to the Control Board.
Replace the board or complete drive as
required.
Motor Stall Fault
06
Current remained over 150% for
more than 4 seconds.
If the motor is drawing excessive
current (over 150%), the motor
load is excessive and will not allow
the drive to accelerate to set speed.
A longer accel time or a reduced
load may be required.
Name & Fault #
Description
Action
Neg Slope Fault
35
Drive software detected a portion
of the volts/hertz curve with a
negative slope.
Check drive programming.
1. [Maximum Voltage] parameter
must be greater than [Base
Voltage].
2. [Base Voltage] parameter must
be greater than [Start Boost].
3. If the [DC Boost Select]
parameter is set to "Custom,"
[Base Voltage] must be greater
than [Break Voltage] and [Break
Voltage] must be greater than
[Start Boost].
Open Pot Fault
09
An external pot is connected and
the ground lead of the pot is
disconnected creating a potential
drive overspeed hazard. The analog
voltage level of the pot exceeds
3.9V DC.
Check the external potentiometer
circuit at TB2, terminals 1, 2 and 3
for an open circuit.
Operator Error Fault
11
PWM frequency is set too high.
Frequency calculations receive an
invalid number. A SCANbus TM
device requests a Read or Write of
a data type not supported.
Overcurrent Flt
12
Overcurrent is detected in
overcurrent hardware trip circuit.
Check for a short circuit at the
drive output or excessive load
conditions at the motor.
Overload Fault
07
Internal electronic overload trip.
An excessive motor load exists. It
must be reduced such that drive
output current does not exceed the
% of current set by the [Overload
Current] parameter.
Overtemp Fault
08
Heat sink temperature exceeds a
predefined value of 90° C (195° F).
Check for blocked or dirty heat sink
fins. Check that the ambient
temperature has not exceeded 40°
C (104° F).
Overvolt Fault
05
DC bus voltage exceeded maximum
value.
Monitor the AC line for high line
voltage or transient conditions.
Bus overvoltage can also be caused
by motor regeneration. Extend the
decel time or install dynamic brake
option.
Name & Fault #
Description
Action
Phase U Fault
38
A phase to ground fault has been
detected between the drive and
motor in this phase.
Check the wiring between the drive
and motor. Check motor for grounded
phase. The fault is checked during the
power stage diagnostics (Which is after
the start button is pushed , but before
the accel is started) During the power
stage diagnostics the drive goes out and
switches on/off the IGBT’s in a certain
pattern and measures for excessive
current.
Phase V Fault
39
A phase to ground fault has been
detected between the drive and
motor in this phase.
Check the wiring between the drive
and motor. Check motor for grounded
phase. The fault is checked during the
power stage diagnostics (Which is after
the start button is pushed , but before
the accel is started) During the power
stage diagnostics the drive goes out and
switches on/off the IGBT’s in a certain
pattern and measures for excessive
current.
Phase W Fault
40
A phase to ground fault has been
detected between the drive and
motor in this phase.
Check the wiring between the drive
and motor. Check motor for grounded
phase. The fault is checked during the
power stage diagnostics (Which is after
the start button is pushed , but before
the accel is started) During the power
stage diagnostics the drive goes out and
switches on/off the IGBT’s in a certain
pattern and measures for excessive
current.
P Jump Err Flt
37
An attempt has been made to
enable both P Jump and Slip
Compensation.
Verify that both P Jump and Slip
Compensation are not both
enabled.
Pole Calc Fault
50
A fault will occur if:
1. motor rmp > 120 *motor_hertz/motor_poles or
2. motor rpm < 180 *motor _hertz/motor _poles or
3. motor poles < 2 or
4. motor poles > 32
Check parameter programming. Motor
poles is calculated using Parameter 178,
motor hertz, and Parameter 177, motor
rpm.
Power Loss Fault
03
DC bus voltage remained below
85% of nominal for longer than
0.500ms. [Line Loss Fault]
parameter is enabled.
Monitor the incoming AC line for
low voltage or line power
interruption.
Power Mode Fault
26
The internal power mode variable
received an incorrect value.
Check parameter programming.
Check all connections to the
Control Board. Replace the board
or complete drive as required.
Name & Fault #
Description
Action
Power Test Flt
46
The internal power mode variable
received an incorrect value.
Check parameter programming.
Check all connections to the Power
Board. Replace the board or
complete drive as required.
Precharge Fault
19
Occurs if precharge device is open
20ms after the end of a line loss
condition or if the bus charging
alarm remains on for 20 seconds.
Check the precharge circuit for.
possible IGBT failure or damage.
Replace drive.
Precharge Open
56
Precharge device malfunction.
Check the precharge circuit.
Replace drive.
Reprogram Fault
48
An attempt was made to program a
parameter while the drive was
running.
Reprogram parameter after drive is
stopped and fault is reset.
ROM or RAM Flt
68
Internal power-up ROM or RAM
tests have failed.
Check Language Module. Replace
Control Board or complete drive as
required.
Run Boost Fault
34
An attempt has been made to set
the [Run Boost] parameter to a
value greater than the [Start Boost]
parameter.
Verify that parameter has been
programmed correctly.
Serial Fault
10
An active SCANbusTM adapter is
disconnected while it possesses
control of a local bus function.
Heat sink thermistor is open
or malfunctioning.
Check for break in communications
line.
Undervolt Fault
04
DC Bus voltage fell below the
minimum value (388V DC at 460V
AC input). [Line Loss Fault]
parameter is enabled.
Monitor the incoming AC line for
low voltage or line power
interruption.
UV Short Fault
41
Excessive current has been
detected between these two drive
output terminals. This fault is checked
during the power stage diagnostics (Which
is after the start button is pushed, but before
the accel is started). During the power stage
diagnostics the drive goes out and switches
on/off the IGTB’s in a certain pattern and
measures for excessive current.
Check the motor and external
wiring to the drive output terminals
for a shorted condition.
Temp Sense Open
55
Check thermistor and connections.
Name & Fault #
Description
Action
UW Short Fault
42
Excessive current has been
detected between these two drive
output terminals. This fault is checked
during the power stage diagnostics (Which
is after the start button is pushed, but before
the accel is started). During the power stage
diagnostics the drive goes out and switches
on/off the IGTB’s in a certain pattern and
measures for excessive current.
Check the motor and external
wiring to the drive output terminals
for a shorted condition.
VW Short Fault
43
Excessive current has been
detected between these two drive
output terminals. This fault is checked
during the power stage diagnostics (Which
is after the start button is pushed, but before
the accel is started). During the power stage
diagnostics the drive goes out and switches
on/off the IGTB’s in a certain pattern and
measures for excessive current.
Check the motor and external
wiring to the drive output terminals
for a shorted condition.
Xsistr Desat Flt
47
One or more of the output
transistors has gone into
desaturation.
Fault #
Display Name
Fault Description
02
03
04
05
06
Auxiliary Fault
Power Loss Fault
Undervolt Fault
Overvolt Fault
Motor Stall Fault
Auxiliary Input
Power Loss
Undervoltage
Overvoltage
Motor Stall
07
08
09
10
11
Overload Fault
Overtemp Fault
Open Pot Fault
Serial Fault
Op Error Fault
Overload
Overtemperature
Open Potentiometer
Serial Communications
Operation Error
12
13
19
23
24
Overcurrent Flt
Ground Fault
Precharge Fault
Loop Overrn Flt
Motor Mode Flt
Overcurrent
Ground Fault
Precharge
Loop Overrun
Motor Mode Fault
26
29
30
32
33
Power Mode Fault
Hertz Err Fault
Hertz Sel Fault
EEprom Fault
Max Retries Fault
Power Mode
Hertz Error
Hertz Set
EEprom
Maximum Retries
34
35
36
37
38
Run Boost Fault
Neg Slope Fault
Diag C Lim Flt
P Jump Err Flt
Phase U Fault
Run Boost
Negative Slope
Diagnostic Current Limit
P Jump Error
Phase U Open
39
40
41
42
43
Phase V Fault
Phase W Fault
UV Short Fault
UW Short Fault
VW Short Fault
Phase V Open
Phase W Open
UV Short
UW Short
VW Short
46
47
48
50
51
Power Test Flt
Xsistr Desat Flt
Reprogram Fault
Pole Calc Fault
BGND 10ms Over
Power Fault
Transistor Desaturation
Reprogram Fault
Motor Poles Fault
Microprocessor Loop Fault
52
53
54
55
56
FGND 10ms Over
EE Init Read
EE Init Value
Temp Sense Open
Precharge Open
Microprocessor Loop Fault
EEprom Fault
EEprom Fault
Thermistor Open Fault
Precharge Circuit Fault
57
68
Ground Warning
ROM or RAM Flt
Ground Fault Warning
ROM or RAM Internal Memory Fault