Technical information

7 – TROUBLESHOOTING
98
7.1.4 Deceleration not operating as desired
Condition Cause Solution
Decel Time (P18/CFN17) set too
short.
Increase Decel Time. Motor stops too quickly.
Decel Begin and End Levels
(P16/CFN15 and P17/CFN16) set
improperly.
Increase Decel Begin and/or Decel
End levels.
Decel time seems correct but motor
surges (oscillates) at beginning of
deceleration cycle.
Decel Begin Level (P16/CFN15) set
too high.
Decrease Decel Begin Level until
surging is eliminated.
Decel time seems correct but motor
stops before end of deceleration
cycle.
Decel End Level (P17/CFN16) set
too low.
Increase Decel End Level until motor
just stops at the end of the
deceleration cycle.
Decel End Level (P17/CFN16) set
too high.
Decrease Decel End Level until water
hammer is eliminated.
Water hammer still occurs at end of
cycle.
Decel Time (P18/CFN17) too short. If possible, increase Decel Time to
decelerate system more gently.
Motor speed drops sharply before
decel
Decel begin level to low. Increase the Decel Begin Level until
drop in speed is eliminated.
7.1.5 Motor stops unexpectedly while running
Condition Cause Solution
Fault Displayed. Fault Occurred. See fault code troubleshooting table
for more details.
Verify start command input signal is
present or serial communications
start command is present.
Ready Displayed. Start command lost.
Check any permissives that may be
wired into the run command
(Start/Stop)
Control voltage absent. Check for proper control voltage
input. Verify wiring and fuses.
Display Blank, Heartbeat LED on
MX card not blinking.
MX control card problem. Consult factory.