Delta MS300 Series User Manual page 500

ID No. Display on LCD Keypad
22_2
Action Condition
Action Time
Warning Setting Parameter
Reset Method
Reset Condition
Record
Cause
Motor locked
The load is too large
Ambien temperature is too high
Motor cooling system error
Motor fan error
Operates at low-speed too long
Accel. / Decel. time and working
cycle is too short
V/F voltage is too high
Check if the motor rated current
matches the motor nameplate
Check if the PT100 is properly set
and wired
Check if the setting for stall
prevention is correct
Unbalanced three-phase
impedance of the motor
Harmonics is too high
Warning Name
Motor over-heating
(oH3) PT100
Action and Reset
Pr.03-00=11 (PT100), PT100 input condition > Pr.06-57 (default = 7 V)
Immediately act
Error treatment: Pr.06-29
0: Warn and continue operation
1: Fault and ramp to stop
2: Fault and coast to stop
3: No warning
When Pr.06-29 = 0 and when the temperature is < Pr.06-56 condition, the oH3
warning automatically clears.
If the temperature is between Pr.06-56 and Pr.06-57, the frequency outputs
according to the operating frequency setting for Pr.06-58.
When Pr.06-29 = 0, oH3 displays as "Warning". When the temperature is <
Pr.06-56 condition, the oH3 warning automatically clears.
When the temperature is < Pr.06-56 condition, the oH3 warning automatically
clears.
N/A
Clear the motor lock status.
Decrease loading.
Replace with a motor with larger capacity.
Change the installed place if there are heating devices in the surroundings.
Install/ add cooling fan or air conditioner to lower the ambient temperature.
Check the cooling system to make it work normally.
Replace the fan.
Decrease low-speed operation time.
Change to dedicated motor for the drive.
Increase the motor capacity.
Increase the setting values for Pr.01-12–01-19 (accel. / decel. time).
Adjust the settings for Pr.01-01–01-08 (V/F curve), especially the setting value
for the mid-point voltage (if the mid-point voltage is set too small, the load
capacity decreases at low-speed).
Configure the correct rated current value of the motor again.
Check the connection between PT100 thermistor and the heat protection.
Set the stall prevention to the proper value.
Replace the motor.
Use remedies to reduce harmonics.
491
Chapter 13 Warning CodesMS300
Description
Motor overheating warning.
The AC motor drive detects the temperature inside the
motor is too high.
Corrective Actions