SAF NERTINOX 250 P PONTICELLI Safety Instruction For Use And Maintenance page 57

INCIDENT N°2
State of LEDS and various devices
L1 green signal lamp = 0
L2 orange signal lamp = 0
ventilator is working, no LED
lights up
L1 green signal lamp = 0
L2 orange signal lamp = 0
ventilator is working
LED 5 (+ 15 CIR) = 1
LED 6 (- 15 CIR) = 1
LED 7 (+ 24 CIR) = 1
L2 orange signal lamp = 1
L1 green signal lamp
R31 relay on relay PCB should
increase by actionning selector I3
Arc/TIG otherwise, next case
L2 orange signal lamp = 1
L1 green signal lamp = 1
no relay triggered
L2 orange signal lamp = 0
L1 green signal lamp = 1
relay R34 on relay PCB does not
trigger
LED 2 (trigger CIC) = 0
L1 = 1 - L2 = 0
LED 2 (trigger CIC) = 0
relay 34 triggered
L2 = 0 - L1 = 1
LED 2 (trigger CIC) = 0
R34 triggered
LED 2 (trigger CIC) = 1
LED 4 (GAS CIC) = 0
DEFECT : TRIGGER = 1, NOTHING HAPPENS
ð fuse F1 on front panel
ð
ð wiring cables 200, 201 cut
ð connector B35 on the relay
PCB
ð thermal safety ST1 or ST2
= 1
ð WCU option
ð wiring
ð
ð fuse F31 on the relay PCB
ð torch
ð current supply of relay PCB
ð relay PCB
ð connection and filter PCB
ð connections B36 - B16
ð fuse F11 on cycle PCB
ð cycle PCB
ð cycle PCB
Probable cause
ð
Control and remedies
ð change it
ð
ð check 24 V ~ between wires
200 and 201
ð check : 24 V ~ between 1 and
2 of B35, otherwise check
continuity of wires 200 A and
201
ð let the set cool down
ð make sure that the ventilation
ð works, otherwise check fuse
F7
ð check connection of ventilator
220 V ~ between W2 and
100 of B1 if positive, check the
engine
ð check water passage and I3
position
ð if 24 V between 9 of B33 and
ð 2 of B31, cut between 206
B
and 224 A
ð check it
ð shunt the trigger terminals on
front panel. If the cycle starts,
check the torch
ð if R31 on relay PCB does not
trigger under I3 action (TIG arc
selector) check current supply 24
V 50 Hz between 1 and 5
terminals of B35 or 27 V 60 Hz
between 1 and 5 terminals of B35
ð 24 V ~ between 9 terminals of
B33 (wires 224 A) and 4 of B31
(wires 222). Otherwise change
the PCB after having checked its
current supply
ð check wires 232, 230, 222 B,
224 A if 24 V between 222 B
and 224 A filter PCB and 0 V
232 and 230 change the PCB
ð check with ohmmeter
ð
ð check it
ð change it if 0 V between 8 and
6 of B16 when G = 1
ð change it