Intelligence Aided Lifting Equipment
65
Chapter VII
Maintenance
7.1 Inspection & Maintenance Timetable
For the maintenance timetable for intelligence aided lifting equipment, please refer to
Maintenance Manual
.
7.2 Basic failure diagnosis
Failure
Causes of failure
Remedy
No
display
for
handle LCD
1. 24V power supply is
not supplied to the
handle end;
2. The internal sliding
connection
of
the
handle, the cables or
the handle board are
abnormal;
Check whether the main unit input power
supply wiring is normal [Chapter 3.1].
Check whether the main unit input supply
voltage is normal. Single wire 220VAC for
80KG and 200KG, three-phase 220VAC for
300KG and 600KG. [Chapter 3.1]
Check whether the signal cable is connected to
the handle end with 24V power supply: for
coaxial handles, indefinitely variable speeds
handles and all – touch handles, please check
Pin 1 and Pin 4; for remote installation sliding
handles, please check Pin 2 and Pin 6. [Chapter
2.5]
Check whether the voltage of Pin 1 and Pin 4 of
the host signal cable interface is 24V. [Chapter
3.2]
Check whether there is 24V output at the
switching power supply in the machine.
Check whether the main circuit board connector
in the machine is loose.
Check whether the power supply of the Pin
24V_IN and the Pin COM at the “Handle
Control Interface” of the main circuit board in
the machine is 24V.
Check the handle slipping rings and internal
connecting cables.