6-14
[ 5 ]
0pl
Output phase loss
Problem
Output phase loss occurred.
Possible Causes
What to Check and Suggested Measures
(1) Inverter output wires are
broken.
Measure the output current.
Replace the output wires.
(2) The motor winding is
broken.
Measure the output current.
Replace the motor.
(3) Screws on the main
circuit power input
terminals are loose.
Check if the screws on the inverter output terminals have become
loose.
Tighten the terminal screws to the recommended torque.
(4) A single-phase motor
has been connected.
Single-phase motors cannot be used. Note that the FRENIC-Mini
only drives three-phase induction motors.
[ 6 ]
0h1
Heat sink overheat
Problem
Temperature around the heat sink has risen abnormally.
Possible Causes
What to Check and Suggested Measures
(1) Temperature around the
inverter exceeded the
inverter's specification
range.
Measure the temperature around the inverter.
Lower the temperature around the inverter (e.g., ventilate the
panel where the inverter is mounted).
(2) Ventilation path is
blocked.
Check if there is sufficient clearance around the inverter.
Change the mounting place to ensure the clearance.
Check if the heat sink is not clogged.
Clean the heat sink.
(3) Service life of cooling
fan has expired or
cooling fan is faulty.
Check the cumulative run time of the cooling fan. Refer to Chapter
3, Section 3.4.5 "Reading maintenance information – "Maintenance
Information"."
Replace the cooling fan.
Visually check whether the cooling fan rotates normally.
Replace the cooling fan.
(4) Load was too heavy.
Measure the output current.
Reduce the load (e.g. Use the overload early warning (E34) to
reduce the load before the overload protection is activated.). (In
winter, the load tends to increase.)
Decease the motor sound (Carrier frequency) (F26).
Enable the overload prevention control (H70).