Tweco 186 DC Inverter - Manual (Page 72)

186 AC/DC INVERTER SERVICE
POWER SOURCE PROBLEMS AND ROUTINE SERVICE REQUIREMENTS 5-2 Manual 0-5237
FAULT CAUSE REMEDY
Error Code “Err 001” is
displayed on the digital
displays in conjunction
with the Fault Indicator
Illuminating.
A Thermal Overload This is due to the duty cycle of
the power source being exceeded.
Once the power source cools
sufficiently it will automatically
reset and the Fault Indicator and
Err 001 will go off and the power
source is then able to continue
welding. During the time of
cooling the power source should
remain ON such that the fan
continues to operate allowing the
unit to cool sufficiently. If after 30
minutes with the fan running the
Fault Indicator has not gone OFF
then have an Accredited Thermal
Arc Service Provider check the
power source.
B Primary Circuit Overload
This is due to primary circuit
component(s) malfunctioning
which results in excessive primary
circuit current. Switch the power
source to OFF immediately to
allow all components to cool
down for at least 30 minutes.
If after 30 minutes “Err 001” is
displayed and Fault Indicator
illuminates when the power
source is switched back ON turn
the power source OFF and have an
Accredited Thermal Arc Service
Provider check the power source.
Table 5-1: Power Source Problem
5.03 Routine Service and Calibration Requirements
!
WARNING
There are extremely dangerous voltage and power levels present inside this Inverter Power Source. Do
not attempt to open or repair unless you are an accredited Thermal Arc Service Provider. Disconnect
the Welding Power Source from the Mains Supply Voltage before disassembling.
Routine Inspection, Testing & Maintenance
The inspection and testing of the power source and associated accessories shall be carried out in accordance
with Section 5 of EN 60974.1: Safety in Welding and Allied Processes-Part 2 Electrical. This includes an insula-
tion resistance test and an earthing test to ensure the integrity of the unit is compliant with Thermal Arc original
specifications.
If equipment is to be used in a hazardous location or environments with a high risk of electrocution as outlined in
EN 60974.1, then the above tests should be carried out prior to entering this location.