1. Search the device which caused 
the overheat warning. Remove 
the cause of the problem. 
2. Reset Drive Overheat Warning 
input at the assigned 
multi-function input terminal (S1 
to S6)   
1. The load is too heavy 
2. Deceleration and 
acceleration times are too 
short 
3.The drive is attempting 
to run a motor greater 
than the maximum 
allowable capacity, or a 
special-purpose motor is 
being used   
4.The current level went up 
because of Speed Search 
while attempting to 
perform a fault restart or 
after a momentary power 
loss     
 
1. Reduce the load or use a drive 
of higher rating 
2. Calculate the torque required 
during acceleration and the 
inertia   
»Take the following steps if the 
torque level is not right for the 
load 
·  Increase the settings for 
acceleration and deceleration 
time (C1-00 to C1-03) 
·  Use a drive of higher rating 
3. Check the motor capacity 
·  Make sure the motor capacity is 
right for the drive rating.   
4. During a momentary power 
loss or an attempt to reset a fault, 
the alarm is displayed. However, 
there is no need to take any 
action because the fault display 
will disappear shortly