Power Supply Parts Replacement - Firepower FP-78 Operating Manual

2. Incorrect setting of CURRENT control
a. Check and adjusted to proper setting.
3. Faulty components in unit
a. Return for repair or have qualified technician
repair per Service Manual.
G. Erractic or improper cutting output
1. Poor input or output connections
a. Check all input and output connections.
2. Incorrect type and size cable on input or output
a. Use proper type and size cables.
H. AC Power indicator ON; Cutting output avail-
able; Fans not operating,
1. Fan blades blocked
a. Check and clear blades.
2. Faulty components in unit
a. Return for repair or have qualified technician
repair per Service Manual.
I. AC POWER indicator ON; Fans operate; No gas
flow
1. Gas not connected or pressure too low
a. Check source for at least 60 psi (4.1 bar or 410
kPa).
2. Faulty components in unit
a. Return for repair or have qualified technician
repair per Service Manual.
J. Torch cuts but not adequately
1. Current set too low
a. Increase current setting.
2. Torch is being moved too fast across workpiece
a. Reduce cutting speed (refer to Instruction
Manual supplied with torch.
3. Excessive oil or moisture in torch
a. Hold torch 1/8 inch (3 mm) from clean surface
while purging and observe oil or moisture
buildup (do not activate torch)
SERVICE
5.05 Power Supply Parts
Replacement
Disconnect primary power to the system before
disassembling the torch, leads, or power supply.
A. Cover Removal
1. Remove the four screws securing the Handle and
the Leads Wrap to the top of the Cover.
Mounting Screws
A-01693
Figure 3-1 Handle and Leads Wrap Removal
2. Using a phillips head screw driver remove the ten
screws which secure the Cover to the frame as-
sembly.
26
WARNING
Handle
Mounting Screws
Leads Wrap
Manual 0-2700