TECHNICAL MANUAL "SE" (PBM753)
Revision no. 1 dd. 01/02/2017
P.B.M.
S.r.l.
via Barella, Z.I. - VIGNOLA ( MO ) ITALIA Tel. + 39 (059) 7705311 Fax + 39 (059) 7705300
http://www.gruppopbm.ite-mail :
file:
Manuale SE PBM753 GB rev.1.doc
page 10
CHAPTER 10: FAILURE DETECTION
Below you will find only general information. Since different kinds of failures and/or malfunctions may occur,
please refer to experienced Service Technicians for any problem.
Note: chargers with decreasing current may also have
seeming malfunctions
due to external causes,
such as electrical systems and/or batteries in bad conditions. Take this into account when checking
them.
10.1: NECESSARY INSTRUMENTS
- Multifunctional digital tester
- DC clamp meter
10.2: FIRST CHECKS TO BE PERFORMED
•
Preliminary check on the general conditions of battery charger and battery (see previous paragraph).
•
Make sure that the power cord of the charger has been properly connected to mains and that the mains
switch is OFF.
•
Check the mains.
•
Make sure that charger has been properly connected to battery and check the condition of connectors.
10.3: FAILURE DETECTION AND MEASURES
FAILURE
POSSIBLE CAUSES
REMEDIES AND/OR CHECKS TO BE PERFORMED
BATTERY IS CONNECTED,
CHARGER IS POWERED,
BUT THE CARD DOES NOT
SIGNAL IT AND CHARGER
DOES NOT START
CHARGING
- Blown fuses
- Defective connections
and/or contacts
- Defective card
1) Check the DC output fuse F2 (battery side).
2) Check the fuse F1 on the PBM753 card.
3) Check the path of the charging cables making sure that
there are neither bad contacts on plugs nor
overheatings on parts of cables or cable terminals.
5) Check the voltage path through contactor, auxiliary
transformer, and card input connector, making sure
that a 24VAC voltage is present on the output aux
trasfo and PBM753 card input.
See following photo
6) Check all, if needed, replace the PBM753 control card.
BATTERY AND MAINS ARE
CONNECTED, THE
CONTACTOR OR RELAY
CLOSES BUT THE
CHARGER DOES NOT
DELIVER ANY CURRENT
- Power failure
- Blown fuses
- Defective connections
and/or contacts
- Defective rectifier
bridge
1) Check the phase voltage output from the contactor
contacts and phase voltage input to main Transformer
(TR).
2) Check that cables are in good conditions and there are
no defective cables and/or terminals.
3) Check the output fuse on battery side (F2)
4) Check the efficiency of the rectifier bridge* (RD).
THE BATTERY CHARGER
DELIVERS LITTLE
CURRENT
- Power failure
- Blown fuses
- Defective connections
and/or contacts
- Defective rectifier
bridge
- Low mains voltage
- Wrong wiring of the
Main Transformer
1) Battery already charged or not completely discharged.
2) Failure of one or more mains phases; check the mains
fuses and the contacts of the contactor (TL).
3) Check that the pin for adjustment to mains (CM) is in
the correct position as to the mains voltage present.
4) Check the integrity of cables making sure that there are
neither burnt wires nor oxidized terminals in the power
circuit up to the charging cables.
5) Check the condition of the rectifier bridge (RD)
see
below instructions.