Mosa DSP 500 PS, Руководство по эксплуатации и обслуживанию

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PROBLEM POSSIBLE CAUSE WHAT TO DO
WELDING
P1 All functions performed by
the WDC are regular, but
there is no tension on the
welding sockets
1) Position of regulation poten-
tiometer incorrect knob
1) Adjust the position of the WDC regulation knob on the potentiometer
spindle so that the potentiometer is not completely at the end of its travel
when the knob reaches its minimum position. Idem for the RC remote
control knob.
P2 Malfunction in the selec-
tion of welding processes
or in their confirmation on
other functions performed
by the WDC
1) WDC defective 1) Replace the WDC.
P3 Blinking “ON” LED 1) Current sensor connector P3
2) Aux power voltage value (±15V)
too high or too low
1) Connector P3 not inserted or defective - see drawing 5
2) Check the aux trasformer, see drawing 1
P4 Blinking red LED 1) The chopper thermic protection is
intervening
2) Temperature sensor situated on
chopper (NTC resistor) short cir-
cuited or open.
3) WDC defective
1) The output is inhibited automatically; let the motor continue to run to cool
down the chopper, and after a few minutes the LED will automatically
switch off and there will be current/voltage once again at the welding
sockets.
2) Check chopper connector, drawing 2, from pin 1-2. The resistor must be
bigger than 1800
Ω
and less than 25 K
Ω,
otherwise the led blinking.
Replace the chopper.
In the meantime you can work cutting the wire which arrives to pin
1 - pin 2 and put on it one resistor 10
K Ω.
In this case the thermic protection don’t work but you can use the
machine.
3) Replace the WDC.
P5 Red LED always on 1) WDC defective
2) Chopper defective
3) Current sensor defective
1) Switch off the machine and start it up again; if the LED remains off try
to weld, verifying that the welding is regular; if the LED lights up again.
Replace the WDC.
2) Check the chopper as shown on drawing 2.
3) Replace the sensor.
P6 RC remote does not ope-
rate.
1) Remote control (or cable) defecti-
ve.
2) WDC defective.
1) Check the RC. See drawing 4.
2) Replace the WDC
P7 The welding current is
always at max or always
at minimum
1) Potentiometer on WDC defective
2) WDC defective
3) Welding current sensor defective
1) Check from pin 1-12 connector P4 (pin 1 - ground see drawing 3)
2) Replace the WDC
3) Replace the current sensor
P8 No voltage at the welding
sockets in CV mode
1) Defective wire feeder cable
2) Defective wire feeder
3) Defective WDC
1) Check the connections pin to pin of the wire
2) Check the wire feeder
3) Without wire feeder cable put the pin I in short circuit with G on remote
control connector, the led ON must be light - WDC ok otherwise change
WDC
P9 No welding or generation
output
1) Short circuit of chopper.
2) Short circuit of generation unit.
3) Alternator defective.
1) Disconnect the chopper and re-start the machine; if there is now an
output present, replace the chopper
2) Disconnect the auxiliary output circuit and re-start the machine; if there
is now an output present, there is a short circuit in the auxiliary output
circuit or in one of the components
3) Disconnect all outputs on the alternator (welding and generation
unless the output going to the condensers) and check the capacity of
the condensers. Restart the machine, if there is still no output, replace
the alternator.
TROUBLE SHOOTING DSP - EP5/EP7/ES
M
40.1
REV.0-05/05
12/05/05 M40DSP/EP5-ES_GB