HONEYWELL CORE DRIVE
21
62-0410—04
ovn
ov at normal
SPD
DC BUS over-voltage at constant speed
(230V: DC 450V; 460V: DC 900V)
1. Check if the input voltage falls within the rated AC motor
drive input voltage range.
2. Check for possible voltage transients.
3. If DC BUS over-voltage due to regenerative voltage, please
increase the Decceleration Time or add an optional brake
resistor.
ovS
ov at stop
Hardware failure in voltage detection
1. Check if the input voltage falls within the rated AC motor
drive input voltage range.
2. Check for possible voltage transients.
LvA
Lv at accel
DC BUS voltage is less than
Pr.06-00 during acceleration
1. Check if the input voltage is normal
2. Check for possible sudden load
Lvd
Lv at decel
DC BUS voltage is less than
Pr.06-00 during decceleration
1. Check if the input voltage is normal
2. Check for possible sudden load
Lvn
Lv at normal
SPD
DC BUS voltage is less than
Pr.06-00 in constant speed
1. Check if the input voltage is normal
2. Check for possible sudden load
LvS
Lv at stop
DC BUS voltage is less than Pr.06-00 at stop 1. Check if the input voltage is normal
2. Check for possible sudden load
OrP
Phase
lacked
Phase Loss
Check Power Source Input if all 3 input phases are connected
without loose contacts.
For models 40hp and above, please check if the fuse for the AC
input circuit is blown.
oH1
IGBT over
heat
IGBT overheating
1. Ensure that the ambient temperature falls within the specified
temperature range.
IGBT temperature exceeds protection level
2. Make sure that the ventilation holes are not obstructed.
1 to15HP: 90
o
C
3. Remove any foreign objects from the heatsinks and check for
possible dirty heat sink fins.
20 to 100HP: 100
o
C
4. Check the fan and clean it.
5. Provide enough spacing for adequate ventilation.
oH2
CAP over
heat
Heatsink overheating
1. Ensure that the ambient temperature falls within the specified
temperature range.
Capacitance temperature exceeds 90
o
C
cause heatsink overheating.
2. Make sure heat sink is not obstructed. Check if the fan is
operating
3. Check if there is enough ventilation clearance for AC motor
drive.
oH3
Motor over
heat
Motor overheating
1. Make sure that the motor is not obstructed.
The AC motor drive detects that the internal
temperature exceeds
Pr.06-30 (PTC level)
2. Ensure that the ambient temperature falls within the specified
temperature range.
3. Take the next higher power AC motor drive model.
PWR
Power RST
OFF
Power off
oL
Over load
Overload, The AC motor drive detects
excessive drive output current.
Check if the motor is overloaded, if yes, replace with next larger
drive
ot1
Over Torque
1
These two fault codes will be displayed when
output current exceeds the over-torque
detection level (Pr06-06 or Pr06-09) and
exceeds over-torque detection (Pr06-07 or
Pr06-10) and it is set to 2 or 4 in Pr06-05 or
Pr06-08.
1. Check whether the motor is overloaded.
2. Check whether motor rated current setting (Pr.05-01) is
suitable
ot2
Over Torque
2
3. Take the next higher power AC motor drive model.
uC
Under
Ampere
Low current detection
Check Pr.06-61, Pr.06-62, Pr.06-63.
LMIT
Limit Error
Limit error
Table 14. Fault Codes and Descriptions
NOTE: Additional details and screen shots of the error messages can be found in the full manual.