65
Fault code
Content
Probable cause
What to do
Remark
2&6
Over current during
starting
1. Motor is shorted
2. Inverter output transistor is
shorted.
3. Motor is grounded.
1. Clear short circuit
2. Replace inverter
3. Remove the grounded
circuit
*
**
2&$
Over current during
accel.
1. Accel. time is set too short.
2. Incorrect V/F pattern
selection.
3. Motor capacity exceeds
inverter rating.
1. Extend accel. time
2. Select the optimum V/F
pattern.
3. Select a larger HP inverter.
*
**
***
2&G
Over current during
decel.
1. Decel time is set too short
2. Motor capacity is too large.
1. Extend decel. time
2. Select a larger HP inverter
*
**
***
2&&
Electronic motor thermal
overload
1. Transient load is changed.
2. Motor is overloaded
1. Check motor load
2. Increase inverter size
*
**
***
****
2&
Over current in stop
mode
1. Inverter is damaged.
1. Notify your supplier
2. Replace inverter
*
**
28$
Over voltage during
acceleration
1. Input voltage fluctuation.
2. Inverter is in current limit.
3. Inverter is undersized.
1. Check input voltage.
2. Raise current stall level.
3. Increase size of inverter.
*
**
***
28&
Over voltage during
constant speed
1. Decel. time is set too short.
2. Input voltage fluctuation
3. Insufficient D.B. resistor
1. Extend decel. time.
2. Check input voltage.
3. Install larger D.B. resistor
*
**
***
28'
Over voltage in stop
mode
1. Input voltage fluctuation
2. Inverter is damaged.
3. Insufficient D.B. resistor.
4. D.B. unit is damaged.
1. Check input voltage
2. Notify your supplier to
check.
3. Install larger D.B. resistor.
4. Check and or replace.
*
**
/8&
Low voltage during
constant speed.
1. Input voltage is too low.
2. Momentary power
failure>15mS
1. Correct input voltage.
2. Inspect bus bar system for
collector bounce.
*
**
***
/8
Low voltage in stop
mode
1. Same as above.
1. Same as above.
*
**
***
2+&
Heatsink overheat
during constant speed
1. Ambient temperature is too
high.
2. Motor overloads.
1. Lower the ambient
temperature.
2. Run motor without load.
Check load condition.
*
**
***
2+
Heatsink overheat
1. Ambient temperature is too
high
2. Inverter load too high.
1. Lower the ambient
temperature
2. Decrease load
*
**
***
6HUU
Input sequence error
1. Input sequence contacts
closure out of order.
2. Pushbutton defective.
1. Check contact sequence
2. Replace pushbutton
0
)UH
Forward and reverse
error
1. Both forward and reverse
inputs are active.
2. Mis-wiring or short circuit.
1. Check contact sequence.
2. Replace or repair wiring.
0
7U/
Travel limit closure
1. Active only if Fn46 or Fn47 is
set to 4 or 5.
2. Travel limit input is closed.
1. Reprogram drive if function
is not desired.
2. Back machine off travel limit.
0
(/)
Elapsed time sentinal
1. Active only if Fn59 is
programmed with time.
2. Maintenance reminder.
1. Program Fn59 to 0 to defeat
function.
2. Reset inverter.
*
**
***