Tweco N7500 - Manual (Page 49)

Manual 89250890 8-1 TROUBLESHOOTING GUIDE
TROUBLESHOOTING GUIDE N7500
8.01 Arcair-Matic N7500 Gouging System
In all troubleshooting cases turn power OFF before performing work on the system unless otherwise directed to do so.
CAUTION
Use appropriate Lock OUT and tag OUT measures when working with electrical equipment or electrical
components.
8.02 N7500 General
General
Problem Possible Cause Possible Remedy
Torch Head
nozzle melting Low air pressure at nozzle
Increase air regulator pressure.
Dismantle Torch Head nozzle, clean and reassemble.
Check Air Solenoid Valve.
No power
Power Supply not turned ON Turn ON Power Supply.
AC Power Cable not connected to
N7500
Check AC Power Cable connection.
N7500 Control Box ON/OFF switch
not turned ON
Turn ON N7500.
Power Supply wiring not correct
Check wiring connections to Power Supply. Refer to "Fig-
ure 4-10: Power Supply Comm. Cable Pin Configuration"
on page 4-5 for recommended control wiring.
DC Power Cables not connected or
improperly connected
Check DC Power Cable connections. NOTE: Connections
must be wrench tight.
No operation
with power
supplied to
Remote Pen-
dant
DC Power Cable size too small
Refer to "Table 3-13: Power Cable Requirements" on page
3-10
No low current
No ground
Check ground wire, ground wire connections, work piece
clamp, Power Supply DC Power Cables and wiring con-
nections to Power Supply.
Incorrect control wiring to Power
Supply or from AC Power
Review "Table 4-11: Standard Wiring Connections" on
page 4-6.
Review "4.04 Control Box Installation" on page 4-4.
Programming on Remote Pendant
incomplete
Complete Pendant programming. Refer to "5.04 Remote
Pendant Programming" on page 5-3.
Incomplete, loose, or broken con-
nector
Check all N7500 connections. Repair or replace.
Signal Wire not connected Connect Signal Wire.
N7500 starts
operation but
Torch Head
does not begin
traveling or
delays start of
travel
Travel Delay improperly set
Review "Table 5-10: Travel Delay Setting" on page 5-6
and reprogram as necessary.
Traveler controls improperly set
Review connections from Control Box to Traveler.
Confirm Traveler is ON. Review the Traveler’s Owner /
Operation manual and correct.
SECTION 8:
TROUBLESHOOTING GUIDE