Wexxar WF30T, Operation And Service Manual

Page: 109 / 190

WF30T Case Former Troubleshooting & Repairs
- 10-96 -
10.2 General Troubleshooting
The most common error in troubleshooting packaging machinery problems is an incorrect
diagnosis of the problem. Errors cause much lost time and needless expense and are avoided by
a careful analytical approach before attempting corrective action. Always start by ensuring that
all case size adjustments have been made correctly. Refer to Section 7:
‘Case Size
Adjustments’
.
Establish whether a problem is mechanical, pneumatic, or electrical in nature.
•
If a pneumatic or air-powered mechanism fails to operate properly, first switch
OFF
the
air and attempt to move the mechanism by hand.
•
If the system moves freely, no mechanical problems are indicated, and the air can be
switched
ON
. Now operate the appropriate solenoid valve manually.
•
If the mechanism moves normally when the valve is actuated manually, then the
pneumatic system is working and the problem is electrical in nature. It may be that the
solenoid coil on the valve has failed, or it may be that there is a problem with the signal
reaching the valve
.
Continue this diagnostic systematic approach until the exact malfunctioning component has been
isolated; corrective action will then usually be obvious
.
The following pages list some common mechanical problems that can occur, and make
suggestions for dealing with them. More advanced troubleshooting may require special training.
WARNING!
Switching OFF the air pressure is very important, as air
cylinders can store energy and cause serious injury if
suddenly released from a jammed condition.
NOTE: Some of the advanced troubleshooting steps
contained in Sections 10.2 through 10.6 may need to be
carried out by trained technicians.