YASKAWA F7 User Manual page 137

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Digital
Operator Display
PID Feedback Loss
This alarm occurs when PID Feedback Loss
FBL
Detection is programmed to alarm
(b5-12 = 1) and the PID feedback < PID
Feedback Loss
feedback loss detection level (b5-13) for the
PID feedback loss detection time (b5-14).
Cooling Fin/Cooling Fin Fan Overheat
OH
The temperature of the Drive's heatsink
Heatsnk Overtemp
exceeded the temperature programmed in
(Flashing)
parameter L8-02.
Enabled when L8-03=3.
OH2 Drive overheat alarm signal is input from a
multi-function digital input terminal S3-S8
Over Heat 2
(H1-01 to H1-06) that is programmed for B:
(Flashing)
overheat alarm.
Motor Overheating Alarm
OH3
Detected when A2 or A3, programmed for
Motor Overheat 1
motor temperature (H3-09 or H3-05 = E),
(Flashing)
exceeds 1.17V for time L1-05 and
L1-03 = 3.
OL3
Overtorque Detection 1
Overtorque Det 1
Drive output current > L6-02 for more than
the time set in L6-03 and L6-01 = 1 or 2.
(Flashing)
OL4
Overtorque Detection 2
Overtorque Det 2
Drive output current > L6-05 for more than
the time set in L6-06 and L6-04 = 1 or 2.
(Flashing)
Overspeed
OS
The motor speed feedback (U1-05)
Overspeed Det
exceeded the value set in F1-08 for a time
(Flashing)
longer than the setting in F1-09.
Detected when A1-02 = 1 or 3 and F1-03 = 3.
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Table 6.2 Alarm Displays and Processing (continued)
Description
Diagnostics & Troubleshooting 6 - 12
Aotewell
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Cause
PID Feedback source
(e.g. transducer, sensor, build-
ing automation signal) was not
installed correctly or was not
working.
Cooling fan(s) were not
working, high ambient
temperature, a heat source in
close proximity to Drive
present, or dirty heatsink.
An external overheat condition
exists that was connected to one
of the multi-function input
terminals S3 - S8.
Overheating of the motor as
measured by the motor
thermistor.
Motor was overloaded.
Motor was overloaded.
Overshooting/Undershooting
was occurring.
The reference was too high.
The settings in F1-08 and F1-09
were not appropriate.
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Corrective Action
Verify Drive is programmed to
receive the PID Feedback source
signal.
Check to ensure the PID
Feedback source is installed and
working properly.
Check for dirt build-up on the
fans and cooling fins.
Reduce the ambient temperature
around the Drive.
Remove the heating unit.
Check for an external condition.
Verify the program parameters
H1-01 thru H1-06.
Recheck the cycle time and the
size of the load.
Recheck the accel/decel time
(C1-01 and C1-02).
Recheck the V/F pattern (E1-01
thru E1-13).
Recheck the motor rated current
value (E2-01).
Ensure the values in L6-02 and
L6-03 are appropriate.
Check application/machine
status to eliminate fault.
Ensure the values in L6-05 and
L6-06 are appropriate.
Check application/machine
status to eliminate fault.
Adjust the ASR settings in the C5
parameter group.
Check the reference circuit and
reference gain.
Check the settings in F1-08 and
F1-09.