62
OH-C
Over Heat during
Constant speed
1. Load is too high
2. Ambient temperature is
too high or ventilation is
poor
1. Investigate load condition
2. Select a larger HP T-verter
3. Lower ambient temperature or
improve ventilation
OH1
Braking resistor
overload
1. Decel. Time is too short
2. Frequent run/stop
operation
3. Load is too high
1. Prolong Decel. Time.
2. Prolong run/stop cycle
3. Set Fn_44 to xx0x and increase
resistance of braking resistor
Faults, which can be reset by manual operation, but cannot be auto reset
Fault Code Content Probable Cause What to do
- OC-
Over current
during stop mode
1.Detecting circuit failure
2. CT Signal cable Failure
1. Send T-verter back for repairing
OL1 Motor overload
1. Load is too high
2. Inappropriate V/F
pattern selection
3. Incorrect Fn_69, Fn_70
setting
1. Select a larger HP T-verter
2. Select optimum V/F pattern
3. Select correct Fn_69 & Fn_70
setting
OL2 T-verter overload
1. Load is too high
2. Inappropriate V/F
pattern selection
1. Select a larger HP T-verter
2. Select optimum V/F pattern
OL3 Over-torque
1. Load is too high
2. Inappropriate V/F pattern
selection
3. Fn_78, Fn_79 are set
too low
1. Select a larger HP T-verter
2. Select optimum V/F pattern
3. Select appropriate Fn_78 &
Fn_79 settings
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