Rockwell Automation Publication 150-QS003D-EN-P - November 2013 51
Operation and Troubleshooting Chapter 4
Table 24 - SMC-50 Controller Fault Codes
Display Fault HIM or
Software
Fault Code
Enabled Possible Causes Possible Solutions
Line Fault with
Phase Indication
1, 2, 3 Prestart
and
Running
• Missing supply phase
• Motor not connected properly
• Incoming 3-phase voltage
instability
• Check for open line (i.e. blown fuse)
• Check for open load lead
• Verify power quality
Shorted SCR
with Phase
Indication
4, 5, 6 All • Shorted power module • Check for shorted SCR, replace power module if necessary
Open Gate with
Phase Indication
7, 8, 9 Start or
Stop
• Open gate circuitry
• Loose gate lead
• Perform resistance check; replace power module if
necessary
• Check gate lead connections to the control module
PTC Power Pole
and SCR
Overtemp
10 or 60 • Controller ventilation blocked
• Controller duty cycle exceeded
• Fan failure
• Ambient temperature limit
exceeded
• Failed thermistor
• Check for proper ventilation
• Check application duty cycle
• Wait for motor to cool or provide external cooling
• Replace power module or control module as needed
• Replace fan
Motor PTC 59 Running • Motor ventilation blocked
• Motor duty cycle exceeded
• PTC open or shorted
• Check for proper ventilation
• Check application duty cycle
• Wait for motor to cool or provide external cooling then check
resistance of PTC
No Load Fault 14, 15, 16, 17 Prestart
Only
• Loss of load side power wiring
with phase indication (15=A, 17=C)
• Start command cycled
unexpectedly with motor rotating
• Check all load side power connections
• Check motor windings
Voltage
Unbalance and/
or Current
Imbalance
18 and/or 42 Running • Supply unbalance is greater than
the user-programmed value
• The delay time is too short for the
application
• Check power system and correct if necessary, then correct
the
user-programmed value
• Extend the delay time to match the application requirements
Overvoltage 19 Running • Supply voltage is greater than the
user-programmed value
• The delay time is too short for the
application
• Check power system and correct if necessary, otherwise
correct the user-programmed value
• Extend the delay time to match the application requirements
Undervoltage 20 Running • Supply voltage is less than the
user-programmed value
• The delay time is too short for the
application
• Check power system and correct if necessary, otherwise
correct the user-programmed value
• Extend the delay time to match the application requirements
Overload 21 Running • Motor overloaded
• Overload parameters are not
matched to the motor
• Check motor overload condition
• Check values for overload class and motor FLC and verify
current draw of the motor
Underload 22 Running • Broken motor shaft, belts, tool
bits, etc.
• Pump cavitation
• Incorrect user setting
• Check pump system, machine drive components, and loading
• Check settings
• Repair or replace motor
Jam 23 Running • Motor current has exceeded the
user-programmed jam level
• Correct source of jam or excessive loading and check
programmed time value
Stall 24 Running • Motor did not reach full speed by
the end of the programmed ramp
time
• Incorrect user setting
• Check pump system, machine drive components, and
loading. Repair or replace motor, if necessary.
• Check settings
Phase Reversal 25 Prestart
only
• Incoming supply voltage is not the
expected ABC sequence
• Check power wiring and correct if necessary
