B&C Technologies SA Series Industrial - Manual (Page 72)

TROUBLE SHOOTING
7-12
5 “OPL” Output phase loss protection
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. Wire for motor winding
are broken
Measure the output current.
→ Replace the
motor.
3. The terminal screws for
inverter output were not
tight enough.
Check if any terminal screws have become loose.
→ Tighten the terminal screws to the recommended torque.
4. A single – phase motor has
been connected
Single – phase motor cannot be used. Note that the FRENIC –
Mini only drives three-phase induction motors.
6. “OH1” Overheat protection for heat sink
Problem Temperature around heat sink rose.
Possible Causes What to Check and Suggested Measures
1. Temperature around the
inverter exceeded that of
inverter specifications.
Measure the temperature around the inverter.
→ Lower the temperature around the inverter (e.g., ventilate the
enclosure well).
→ Lighten the load.
2. Accumulated running time
of the cooling fan
exceeded the standard
period for replacement, or
the cooling fan
malfunctioned
Check the accumulated running time (E52 = 2). Refer to “Reading
Maintenance Information”.
→ Replace the cooling fan.
Visually check that the cooling fan rotates normally.
→ Replace the cooling fan.
3. Air vent is blocked.
Check if there is sufficient clearance around the inverter.
→ Increase the
clearance.
Check if the heat sink is clogged.
→ Clean the heat sink.
4. Load was too heavy.
Measure the output current.
→ Lighten the load (e.g., lighten the load before the overload
protection occurs using the overload early warning (E34).
→ Decease the carrier frequency (F26).
→ Enable the overload protection control (H70).