Delta MH300 Series - Page 754

Chapter 14 Fault CodesMH300
14-27
ID No. Display Fault Name Description
22
Electronic thermal
relay 1 protection
(EoL1)
Electronic thermal relay 1 protection.
The drive
coasts to stop once it activates.
Action and Reset
Action condition Start counting when output current > 150% of motor 1 rated current.
Action time
Pr.06-14 (if the output current is larger than 105% of
motor 1 rated current
again within 60 sec., the counting time reduces and is less than Pr.06-
14.)
Fault treatment parameter N/A
Reset method Manual reset
Reset condition Reset in 5 sec. after the fault is cleared.
Record Yes
Cause Corrective Actions
The load is too large. Reduce the load.
Accel./Decel. time and the
working cycle are too short.
Increase the setting values for Pr.01-12–01-19 (accel. / decel. time)
V/F voltage is too high.
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 low, the
load capacity decreases at low speed).
Refer to the V/F curve selection of Pr.01-43.
Overload during low-speed
operation.
When using a general motor,
even it operates below rated
current, an overload may still
occur during low-speed
operation.
Decrease low-speed operation time.
Replace the drive with a dedicated to VFD model.
Increase the motor capacity.
When using VFD dedicated
motors, Pr.06-13=0 (electronic
thermal relay selection motor 1
= 0 inverter motor)
Pr.06-13=1 electronic
thermal relay selection motor 1 = standard motor
(motor with fan on the shaft).
Incorrect value of electronic
thermal relay
Reset to the correct motor rated current.
The maximum
motor frequency
is set too low.
Reset to the correct motor rated frequency.
One drive to multiple motors
Set Pr.06-13=2 electronic thermal relay selection motor 1 = disable
, and
install thermal relay on each motor.
Check if the setting for stall
prevention is correct.
Set the stall prevention to the proper value.