Tweco 1000 Merlin(Dec2004) - Manual (Page 47)

Manual 0-2708 5-1 SERVICE
SECTION 5:
SERVICE
5.01 Introduction
This section describes maintenance procedures, basic
troubleshooting and service performable by operating
personnel. No other adjustments or repairs are to be at-
tempted by other than properly trained personnel.
For major troubleshooting and parts replacement pro-
cedures refer to Merlin 1000 Power Supply Service
Manual 0-2709.
5.02 General Maintenance
A. Routine Maintenance
NOTE
Refer to Appendix 9 for a recommended mainte-
nance schedule for water cooled plasma cutting
systems.
Routine maintenance for the Power Supply should in-
clude an occasional thorough cleaning and inspection. The
frequency depends on the usage and the operating envi-
ronment.
WARNING
Disconnect primary power at the source before as-
sembling or disassembling power supply, torch
parts, or torch and leads assemblies.
B. Power Supply Cleaning
To clean the unit, open the enclosure and use a vacuum
cleaner to remove any accumulated dirt and dust. The
unit should also be wiped clean. If necessary, solvents
that are recommended for cleaning electrical apparatus
may be used.
WARNING
Do NOT blow air into the power supply during
cleaning; make sure to always blow air out of the
unit. Blowing air into the unit can cause metal
particles to interfere with sensitive electrical com-
ponents and cause damage to the unit.
While the unit is open, inspect the wiring in the unit. Look
for any frayed wires or loose connections that should be
corrected.
C. Coolant Filter Assembly
The filter screen should be cleaned periodically. Remove
the filter screen by unscrewing the filter holder from the
Coolant Filter Assembly on the rear panel. Clean the fil-
ter screen by rinsing with hot soapy water. Remove soap
residue by rinsing with clean hot water. Be sure that all
the soap has been removed and the screen is dry of water
before re-installing in the Coolant Filter Assembly.
A-02152
Filter Holder
Filter
Figure 5-1 Coolant Filter Assembly
D. In-Line Filter Assembly
The in-line filter screen should be cleaned periodically.
To gain access to the In-Line Filter Assembly remove the
right side panel (viewed from the front of unit) of the
Power Supply. Remove the filter screen by unscrewing
the filter holder from the In-Line Filter Assembly. Clean
the filter screen by rinsing with hot soapy water. Remove
soap residue by rinsing with clean hot water. Be sure
that all the soap has been removed and the screen is dry
of water before re-installing in the In-Line Filter Assem-
bly.