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MC250
5.3. Troubleshooting
TROUBLE
Hoist doesn't run
(RED LIGHT ACTIVATED)
The machine moves
making an abnormal noise
or abruptly
Machine slides down when
loading weight
The electric motor does not
start or starts with difficulty
The machine does not stop
at stops
The cage vibrates
abnormally
The reducer
sounds/vibrates
abnormally
The hoist suffers stops
when moving
The machine goes down
when we push up button
E1 or E2 failure
Drive error: oPF1
Drive error: oPF2
Drive error: obF
Drive error: SoF
Drive error: EPF1
(+34) 944 71 16 00 (+34) 944 53 17 54 export@alba.es
MC250 Rev.02-USA
PROBABLE CAUSE
Emergency stop activated
Safety endtrack limit switch activated
Mast detector
Guide roller or bearing damaged
Lack of Grease in mast rack
Brake wear
Brake wear
Overload
Brake rectifier doesn't work
Power voltage failure
Problem in endtrack cams
Problem with motor brake
Non tighten screws
Rack-pinion gear problem
Lack of lubrication
Roller damage
Mast tube damage
Lack of oil in gearmotor
Gearmotor bearing damaged
Communication cable damaged
Endtrack switch unadjusted
Phase error
Problem in transformer
Loss of a phase at the invertor output
Motor not connected or motor power too low
Excessive braking or dragged load
Instability or load too high
External device fault
page
SOLUTION
Check emergency stop
Check safety microswitch
Check mast detector
Check/replace guide rollers
Apply Grease to the rack
Check/replace brake (disk, rectifier)
Check brake airgap
Check load on cage
Check/replace brake rectifier
Check supply voltage
Check endtrack cams and switches
Check motor brake
Check and adjust guide roller screws
Check rack-pinion gearing
Apply Grease to rack and pinion
Check rollers
Check the mast
Check oil level
Alert motor technical service
Check communication cable
Check the adjust of switches
Change the phases in the motor box
Check/replace the transformer
Check the connections of the drive to the
motor
Check the connections of the drive to the
motor
Check resistance connection
Check resistance connection
Check motor and brake and E3
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