Miller S-75SC Manuel du propriétaire - Page 28

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7-3. Diagnostics

Display On

Meter

(If Equipped)

HELP 11

HELP 12

HELP 13

HELP 14

*Since blink On time and blink Off time are equal in a four-blink

cycle, the four−blink sequence appears as constant blinking.

• Error Indications

Error conditions are indicated by LED3 on

PC1 or on display (on models with meters). To

view LED3, turn Off unit, remove wrapper, and

turn unit On. LED3 is most easily observed

from the left side of the unit.

The LED blinks in a 2.5 second cycle. The

number of blinks in this period indicates the

type of error.

The priority of the errors is related to the num-

ber of blinks indicating the error. The more

blinks, the more severe the error (motor error

is top priority). A higher priority error overrides

OM-223 605 Page 24

Front panel is shown removed for purpose of

illustration only. In actual use, front panel

would be in place.

LED3 Sequence On

Motor Control Board PC1

1 Blink

2 Blinks

3 Blinks

*4 Blinks

a lower one (if a motor error and a communica-

tion error existed, the light would blink four

times for the motor error).

• The communication error occurs 2.5 sec-

onds after a loss of communication between

the motor and the meter board (if equipped).

The user may continue to weld with this er-

ror. The error may be cleared by turning

power Off, waiting a minimum of two sec-

onds, and turning power On.

• The trigger error occurs if the user has the

trigger held for more than two minutes with-

out striking an arc (providing current over-

ride is not enabled), or if the user holds the

Indicated Error

Communication Error

Trigger Error

Tach Error

Motor Error

trigger past the postflow phase in a timed

weld. This error also occurs if the trigger is

held when the feeder is powered up. The er-

ror may be cleared by releasing the trigger.

• The tach error occurs 2 seconds after the

loss of tachometer feedback. The user may

continue to weld with this error. The motor

speed is regulated through the monitoring of

voltage and current.

• The motor error indicates that the motor

has been drawing too much current for too

long. To remedy this, reduce the wire feed

speed or the wire feeder torque load/duty

cycle.

Wrapper

Motor Control Board PC1

LED3

Ref. 802 687