Lincoln Electric IDEALARC CV-305 - Manual (Page 24)

MAINTENANCE D-2 D-2
IDEALARC® CV-305
SAFETY PRECAUTIONS
GENERAL MAINTENANCE
1. The fan motor has sealed bearings which require
no service.
2. In extremely dusty locations, dirt may clog the air
channels causing the welder to run hot with prema-
ture tripping of thermal protection. Blow out the
welder with low pressure air at regular intervals to
eliminate excessive dirt and dust build-up on inter-
nal parts.
MACHINE AND CIRCUIT PROTECTION
The CV-305 Control PC Board has built-in diagnostic
routines to alert the operator when trouble exists.
When a trouble condition occurs, the CV-305 meter will
display an error code, in the form "EXX", where "XX"
refers to a specific error. See
TROUBLESHOOTING
section for an explanation of the error codes.
The power source is thermostatically protected against
overload or insufficient cooling. If the machine is over-
loaded, the thermostat will open, thermal protection
indicator light will turn on, and the output will be zero.
The fan will continue to run and auxiliary power will still
be available. The thermostat will remain open until the
machine cools, at which time it will close and the out-
put will again be available.
The CV-305 is electronically protected against over-
loads and accidental short circuits. The overload pro-
tection circuit automatically reduces the output current
to a safe value when an overload is detected. If the cir-
cuitry senses a short circuit, it will shut off the CV-305
output. The short circuit protection circuit can be reset
by turning the CV-305 Power switch OFF for at least 10
seconds. Remove the short before turning the Power
switch ON again.
ELECTRIC SHOCK can kill.
• Only qualified personnel should
perform this maintenance.
• Turn the input power OFF at the
disconnect switch or fuse box
before working on this
equipment.
• Do not touch electrically hot
parts.
WARNING
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