Yaskawa F7 Drive User Manual - Manual (Page 131)

Diagnostics & Troubleshooting 6 - 6
Table 6.1 Fault Displays and Processing (continued)
Digital
Operator Display
Description Cause Corrective Action
OH
Heatsink Overtemp
(Continued)
Heatsink Overheat
The temperature of the Drive’s heatsink
exceeded the setting in L8-02 and
L8-03 = 0 to 2.
The Drive’s cooling fan(s)
stopped.
Replace the cooling fan.
Drive’s internal cooling fan stopped
(F7U2018 / F7U4018 and larger). The Drive’s internal cooling
fan(s) stopped.
OH1
Heatsink Max Temp
Heatsink Overheat
The temperature of the Drive’s heatsink
exceeded 105 degrees C.
There was a heat source
nearby. Check for dirt build-up on the
fans and heatsink.
The ambient temperature was
too high. Reduce the ambient temperature
around the Drive.
The Drive’s cooling fan(s)
stopped.
Replace the cooling fan.
Drive’s internal cooling fan stopped
(F7U2011 / F7U4011 and larger capacities). The Drive’s internal cooling
fan(s) stopped.
OH3
Motor Overheat 1
Motor Overheating 1
Detected when A2 or A3, programmed for
motor temperature (H3-09 or H3-05 = E),
exceeds 1.17V for time L1-05 and
L1-03 = 0 to 2.
Overheating of motor as
measured by the motor
thermistor.
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).
OH4
Motor Overheat 2
Motor Overheating 2
Detected when A2 or A3, programmed for
motor temperature (H3-09 or H3-05 = E),
exceeds 2.34V for time L1-05 and
L1-03 = 0 to 2.
Overheating of motor as
measured by the motor
thermistor.
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).
OL1
Motor Overloaded
Motor Overload
Detected when L1-01 = 1 to 3 and the
Drive’s output current exceeded the motor
overload curve.
The overload curve is adjustable using
parameter E2-01, L1-01, and L1-02.
The load was too large. The
cycle time was too short at the
accel/decel time. Recheck the cycle time and the
size of the load as well as the
times set in C1-01 and C1-02
The voltage of the V/F
pattern was incorrect for the
application.
Review the V/F pattern
parameters, E1-01 thru E1-13.
Motor rated current setting
was improper. Check the motor rated current
value in E2-01.