Hypertherm MAX42, Service Manual

Page: 47 / 100

MAINTENANCE
Page 3-12 MAX42 Service Manual
No
From page 3-7
Yes
While pressing GAS TEST switch
S2 observe the POWER and TEMP/
PRESS LEDs for dimming or
blinking.
LEDs dim or
blink?
Yes
No
Pilot arc fires?
No Check to see if
air is coming
out of torch.
Yes
Yes
Air coming out
of torch?
To page 3-13
To page 3-14
No
To page 3-15
6
8
7
Pressure
gauge indicates
70 psi?
5
Press and hold GAS TEST switch S2
and adjust for 70 psi (dynamic)
indication at pressure regulator
gauge. (Refer to regulator pressure
adjustment in this Section).
Check P102/J102 at PCB14 ( Fig. 4-3 [6] ),
wires W106-W109, air solenoid V1 ( Fig. 4-5
[6] ), and pressure regulator ( Fig. 4-6 [9] ).
Repair or replace as required. If no faults
are found, replace PCB14.
Check voltage regulator LM350 ( Fig. 4-6
[9] ), air solenoid valve V1 ( Fig. 4-5 [6] ),
and control board PCB14 ( Fig. 4-6 [9] ).
Replace as required. Also check wires
W106 - W109, and connectors P102/J102.
Repair or replace as required.
Press torch start
switch to fire pilot