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A complete Parts List is available at www.MillerWelds.com
OM-272989 Page 43
Message
Remedy
Error
Fan error-The fan is running too
slow or is damaged.
The fan blades are obstructed.
Clear obstruction from fan.
The fan wiring harness is disconnected.
Reconnect the fan.
The fan is damaged.
Contact Miller Electric Mfg. Co. service department.
The control board is damaged.
Thermal error
−
Primary thermistor
range error.
The primary circuit thermistor is unplugged.
Reconnect the primary circuit thermistor.
The primary circuit thermistor is reading too high or
too low for a valid temperature.
Contact Miller Electric Mfg. Co. service department.
The control board is damaged.
Thermal error
−
Secondary ther-
mistor range error.
The secondary circuit thermistor is unplugged.
Reconnect the secondary circuit thermistor.
The secondary circuit thermistor is reading too high
or too low for a valid temperature.
Contact Miller Electric Mfg. Co. service department.
The control board is damaged.
Boost error
−
Cycle power to clear
error.
The primary boost has not successfully been
established.
Cycle power to clear error. If this error persists af-
ter a power cycle, contact Miller Electric Mfg. Co.
service department.
Over voltage
−
Cycle power to
clear error.
Primary voltage is above 310 volts.
Reduce primary voltage below 310 volts.
Under voltage
−
Cycle power to
clear error.
The primary voltage is below 90 volts.
Increase primary voltage above 90 volts.
Network error
−
Communication
between micros has been lost.
The two microcontrollers on the control board are
no longer communicating.
Cycle power to clear error. If this error persists after
a power cycle, contact Miller Electric Mfg. Co. ser-
vice department.
Network error
−
Communication
between boards has been lost.
The wiring harness between the control board and
interface board is damaged.
Cycle power to clear error. If this error persists after
a power cycle, contact Miller Electric Mfg. Co. ser-
vice department.
The control board is damaged.
The interface board is damaged.
Cable error
−
Connect wire feed
housing cable to clear error.
A process that requires a welding gun to be at-
tached to the internal motor is selected, but the wire
feed housing cable is not attached to either the pos-
itive stud or negative stud of the power source.
Connect wire drive assembly cable to either the
positive or negative stud, or select a different
process.
The control board is damaged.
Contact Miller Electric Mfg. Co. service department.
Cable error
−
Wire feed housing
cable is touching electrode or
work.
A process that does not require a welding gun to be
attached to the internal motor is selected, but the
wire drive assembly cable is attached to either the
positive or negative stud of the power source.
Remove wire drive assembly cable from either the
positive or negative stud, or select a different
process.
The control board is damaged.
Contact Miller Electric Mfg. Co. service department.
