User Manual User Manual

9-4 Troubleshooting
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Prestart fault indication.
Table 9.B Motor Will Not Start — No Output Voltage to the Motor
Table 9.C Motor Rotates (but does not accelerate to full speed)
V24 Recovery F44 • Control module internal 24V control
power stays low after closing bypass
contactor
• Check control power. Make sure it is within the
operating parameters of the SMC
• Check control power connections, including ground,
to the control module
• Replace control module
V24 Loss F45 • Control module internal 24V supply
out of normal range
• Same as F44
V Control F46 • Sense of control voltage in error • Same as F44
Option Input 1, 2 F48, F49 • Fault occurs based on the user
configuration of the option input
• Review the option input fault configuration and clear
the fault condition
Varies (control module
system faults)
F128-F209 • Control module wiring
• Control module defective
• Review the control module wiring. Ensure ground
terminal is secure connected to system earth
ground. Ensure an RC snubber is connected to all
inductive loads in the control circuit (refer to input
wiring)
• Replace the control module
Table 9.A SMC Fault Display Explanation (Continued)
Display Fault Code Possible Causes Possible Solutions
Display Possible Cause Possible Solutions
Fault displayed • See fault description • See Table 9.A addressing
fault conditions
Display is blank • Control voltage is
absent
• Failed control module
• Check control wiring and
correct if necessary
• Replace control module
• Cycle control power
Stopped
0.0 Amps
• Pilot devices
• SMC Enable input is
open at terminal 13
• Input terminals are not
wired correctly
• Start-Stop control has
not been enabled for
the human interface
module
• Control voltage
• Failed control module
•Check wiring
•Check wiring
•Check wiring
• Follow the instructions on
page 7-4…7-6 to enable
control capability
• Check control voltage
• Replace control module
Starting • Two or three power
phases are missing
• Check power system
Display Possible Cause Possible Solutions
Fault displayed • See fault description • See Table 9.A addressing
fault conditions