P.F.E. INTERNATIONAL
TO : ALL UK ENGINEERS AND OVERSEAS AGENTS
TECHNICAL BULLETIN N0. 1420/107
Please ensure this Technical Bulletin is read by all technical staff involved in the maintenance
and repair of P.F.E machines.
This bulletin must be read by all P.F.E. engineers involved in the maintenance and service of
Maximailer & Maximailer Plus, and must be attached to all copies of the Maximailer Service Manual.
THIS IS A MANDATORY TECHNICAL BULLETIN
MAXIMAILER ARCING OF FUSE CONTACTS (110v MACHINES)
Machines Affected: Maximailer Inserter 110V only (part number A4604A).
Symptom: Arcing at the fuse contacts.
There is a potential problem with the fused mains input switch whereby the fuse contacts can overheat, resulting in heat damage to the mains switch body. This bulletin decribes the best way to prevent this.
IMPORTANT
This check must be carried out on ALL 110V Maximailers in service. Failure to do so could
result in a serious safety hazard to machine operators.
1.
2.
3.
4.
5.
Remove power to the machine at the wall socket.
Switch off the mains inlet and remove the mains cable.
Pull out the fuse holder and remove the fuses.
Inspect the fuse caps and holder for discoloration, distortion, pitting or any signs of
arcing or excessive heat.
If there is any evidence of arcing or excessive heat, replace the Mains Filter Assembly
184-193 as described on page 2, then follow step 7.
If there is any evidence of arcing, do not allow operators to run the machine until
the filter unit has been replaced.
6.
If both fuses look normal, discard them both and fit new fuses as described in step 7.
7.
All filter units must be fitted with Schurter 10A glass anti-surge fuses, manufacturer’s part
number 0034.2137, PFE part number 135-110UL. DO NOT fit any other make of fuse.
See guidelines for replacing the fuses on page 3.
When new fuses are fitted, reconnect the mains supply and switch on the machine. Check for normal
operation.
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Replacing the mains socket
1.
On the insert head drive side, remove the cover (3 pan head screws inside the chassis - 2 at the
closer, 1 at the opposite end). Then remove the skirt over the mains panel (2 screws).
2.
For early machines pre-dating 23/02/2005, the mains filter assembly 184-167 will be hardwired
into the power supply. In this case, the PSU assembly must be replaced with PFE 184-190
(PSU) & 184-193 (Mains Input Bracket).
3.
For later machines, fit new mains filter assembly 184-193. Replace covers
Î
Later machines with plug-in PSU/
mains input (184-190/184-193)
Early machines with hardwired
PSU/mains input (184-167)
Î
Guidelines For Fitting Fuses To The Mains Filter Unit
The figures on page 3 show the correct and incorrect methods of fitting the fuses. Ensure fuses are
located inboard in the fuse holder as shown. Do not allow the fuses to move outwards towards the
sides of the holder: this will force the ends to point inwards as the holder is inserted, and the fuses
will not be prperly located.
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CORRECT Î
Î INCORRECT
When the fuses are properly inserted in the holder, this will clip into place in the switch assembly without
undue force. If it has to be pushed hard, then the fuses have been incorrectly inserted. Important: if this
has happened, the contacts will now be bent and the switch assembly must be replaced.
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