Prowinch PWJTHF, User Manual

Page: 45 / 51

Version 1.0
45
Troubleshooting
45
Electric shock
Hook
Condition Reason Action Cause Correction
Electric shock upon touching
machinery or control switch
Equipment not prop -
erly grounded
Measure earth resistance. If below
100Ω assemble ground wire
Improper ground wire con -
nection
Firmly connect ground wire
Ground wire bad connection Assemble carefully to prevent
loose screw
Cable break
Do not apply excessive force on
cable
Dampness/ water Clean, use once dry Wet hands Do not operate with wet hands
Condition Reason Action Cause Correction
Hook mouth open
Hook deformation
Replace hook if deformation is
beyond permitted range.
Overload Operate under rated voltage
Lifting (hook connected with
grounded object)
Do not lift grounded objects.
Load hanging on hook head;
hook pull horizontal
Lifting load properly with hook
Hanger suspension errors Lifting angle must be controlled
within 120 °
Load size exceeds rated hook Using proper hook
Hook twist Chain wrapped around load Do not wrap chain
Head hook improper rotating
Bearing rust, corro -
sion
Hand rotation; maintain or replace
if experiencing difficulty rotating
Inadequate grease
lubricant; corrosion
Apply grease lubricant regularly;
prevent hook contamination of
chemical agents
Bearing damage Dust
Prevent foreign matter from
entering head
V.07.22 [LA]