Franklin Electric CERUS X-DRIVE CXD-003A-4V, Installation And Operation Manual

Page: 152 / 252

MAINTENANCE
Troubleshooting
152
oH3
(24)
Motor over heat
Motor overheating (PTC/PT100). Fault treatment acts according to [PROT-19]
Action and Reset
Action level PTC value > [PROT-20] or [PT100] > [PROT-31]
Action time Immediately
Related parameters Fault treatment acts according to [PROT-19]
Reset method
Auto If [PROT-19] = 0, then oH3 is a “Warning”
Manually If [PROT-19] = 1 or 2, oH3 is a “Fault”
Reset condition Immediately
Recorded Yes, when [PROT-19] = 1 or 2
Possible Causes Corrective Action
• Motor shaft lock
• The load is too large
• Ambient temperature is too high
• Motor cooling system error
• Motor fan error
• Operate at low-speed too long.
• Accel./Decel. time and working cycle
are too short
• V/F voltage is too high
• Motor rated current does not match
motor nameplate.
• PTC is improperly set and wired.
• Incorrect setting for stall prevention
• Unbalanced three-phase impedance
of the motor
• Harmonics are too high.
• Remove the shaft lock
• Reduce the load and increase the motor 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. Replace the motor with a dedicated to VFD model. Increase the
motor capacity.
• Increase the setting values for accel./decel. time
• Adjust settings for 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).
• Reset to the correct motor rated current.
• Check the connection between PTC thermistor and the heat protection.
• Set the stall prevention to the proper value.
• Replace the motor.
• Use remedies like filters to reduce harmonics.
Fault Display Description
oL (21)
Overload
Excessive drive output current
Action and Reset
Action level Based on overload curve and derating curve.
Action time When the load is higher than the protection level and exceeds allowable time, the oL protection activates.
Reset method Manually
Reset condition Reset in 5 sec. after the fault is cleared
Recorded Yes
Possible Causes Corrective Action
• Motor and/or pump misalignment
• Dragging motor and/or pump
• Motor and/or pump locked
• Abrasives in pump
• Excess motor cable length • Amperage is above MAX AMPS at minimum frequency
• Remove and repair or replace as required
• Reduce motor cable length. Adhere to Maximum Motor Cable Length table.
• For FE MagForce application, verify motor model selection, pump load, and max amps.
Fault Display Description