Operation Instructions for ZLP250
Temporarily Installed Suspended Access Equipment
16
6.
Common Failures and Troubleshooting
Troubles
Analysis of causes
Troubleshooting
Remarks
Suspended platform
slides down in static
condition
1. Motor electromagnetic brake fails.
2. The spacing between brake and
armature is over too big.
1.
Replace
electromagnetic
brake.
2. Adjust the space.
See
5.1.3
Suspended platform
cannot
stop
in
ascending
The main contact point of AC
contactor disengages.
Press emergency stop button or
pull the limit switch to stop the
moving
of
the
platform,
replace the contactor.
Control button fails.
Press emergency stop button or
pull the limit switch to stop the
moving
of
the
platform,
replace the control button.
Suspended platform
cannot
stop
in
descending
The main contact point of AC
contactor disengages or the control
button fails.
Press emergency stop button or
pull the limit switch to stop the
moving
of
the
platform,
replace the contactor or control
button.
The electromagnetic brake is out of
order:
1.
The
space
between
the
electromagnetic
disk
and
the
armature is too big.
2.
Too small contact area between the
friction disk and the armature.
3.
Slipping between the friction disk
and the armature because of the
water or oil.
4.
The steel rope is slipping in the
hoist.
1.
Adjust the space. If it is
can’t be done, replace the
brake disk.
2.
Check if the space between
the friction disk and the
armature is well-distributed;
otherwise, replace the disk
or the armature.
3.
Clean.
4.
Repair the hoist.
See
5.1.3
Suspended platform
cannot ascend and
descend
Power supply is abnormal:
1. Leakage breaker disengages.
2. Phase lacking.
1. Check to see if any leakage,
and
take
preventive
measures.
2. Check if the 3-phase power
is normal and reconnect.
Failure of control line:
1.
Control transformer or control
button damaged.
2.
Thermal overload relay breaks or
damages.
3.
Universal switch not in good
contact.
1.
Replace.
2.
Wait 3-5 minutes before
restarting or replacing the
thermal overload relay.
3.
Replace.