Pfaff 034554030 Betriebsanleitung Seite 36

Electric Stacker with Electric Travel
English
EGV ESL EPH
8.4. Symbols and Alarms
Three symbols inform the operator as follows:
8.4.1 Symbol of the turtles:
It shows the starting-up of the
"soft" operation way of the
truck, that is maximum speed
and reduced acceleration.
8.4.2 Symbol of
adjustable wrench:
It shows the request of pro-
grammed maintenance or the
alarm condition, shown also by
means of the corresponding
code; the piece of information
given by the MDI indicator is
extremely useful to the
maintenance service, because
it eases the location of the
possible breakdowns of the
machine to the operator
himself, making in this way
easier to solve the problem.
8.4.3 Symbol of the sand-
glass:
When it is flashing, it means
that the hour counter is working.
8.4.4 Decoding of the alarms on the MDI
The indicator gives an indication about the alarm condi-
tion of the machine connected to it, through the signal-
ling of a code corresponding to the actual alarm.
In case an alarm happens, the red LED starts flashing in
order to draw the attention of the operator towards the
display, and the symbol of the adjustable wrench
appears.
By consulting the following table the operator, if the kind
of alarm is not particularly serious, can solve the prob-
lem by consulting the paragraph about alarms, in the
system manual to which it is linked.
Whenever the alarm results difficult to remove, it is
anyway possible to give useful information to the service
centre and in this way to speed up the servicing time,
saving time and money.
AL 08 - WATCH DOG
The text is executed at the key turn-on, at the stand-by
and on running.
Possible causes:
a) Watch-dog hardware circuit not OK,
b) Watch-dog Software not OK.
Design changes under reserve!
the
F8.1.20
AL 13 - EEPROM KO
Fault in the area of memory where the adjustment pa-
rameters are stored. This alarm inhibits machine opera-
tion. If the fault continues when the Key Switch is recy-
cled, replace the logic. If the fault disappears, the previ-
ously stored parameters will have been replaced by the
default parameters.
AL 15 - VFIELD NOT OK
This test is made at standby with the Line Contactor
open. In this condition the voltages on both the connec-
tions of field must be around 1/2 V battery This alarm is
generated if the field voltage is different from this value.
Possible causes:
a) Frame fault on the motor to chassis.
b) Incorrect connection of the field winding to the con-
troller.
c) Failure of the controller in the section relative to the
field
AL 19 - LOGIC FAILURE #1
This test is carried out at the start-up: Possible cause:
failure of the logic board.
AL 32 - VMN NOT OK
This test is performed at rest, with the general Contac-
tor Closed, and also during operation. At rest if VMN is
lower than battery voltage this Alarm is generated.
During operation this Alarm is generated if VMN doesn't
follow the duty-cycle of the chopper.
Possible causes:
a) Incorrect Motor connection.
b) Short circuit motor winding to chassis
c) Defect in the power unit
AL 37 - Contactor Closed
This check is made during the initial diagnosis. With the
coil of the line contactor de energised, the capacitors
should not be charged, unless there is divert resistor
across the power poles.
Possible causes:
a) The line contactor power poles are welded.
b) This alarm could be generated even if the line con-
tactor has opened, but there is a problem with either
the field circuit, or a problem detected by the safety
microprocessor.
AL 49 - I = 0 EVER
This check is made during travel. If the current is not
higher than a preset minimum value, this alarm is gen-
erated and the machine is disabled.
Possible causes:
See STBY I HIGH. Check the motor armature (brush
connections).
page 36