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F-9
TROUBLESHOOTING AND REPAIR
F-9
DH-10
Observe all Safety Guidelines detailed throughout this manual.
PROBLEMS
(SYMPTOMS)
POSSIBLE AREAS OF
MISADJUSTMENT(S)
RECOMMENDED
COURSE OF ACTION
The “Timer”, "Control” and/or
“Trigger” buttons do not function
correctly.
One of the encoder control knobs
functions but the other one does
not.
Neither encoder control knob
functions.
1. Make certain the DIP switches
on the control board are not set
for the security mode. DIP
switch S1 position 5 and posi-
tion 8 must be in the OFF posi-
tion.
2. Check the connectors and wires
between the display board and
the control board for loose or
faulty connections. (J11 and J3)
3. Check the connector J10
between the keypad and the
display board for loose
connections.
1. The unit maybe in a mode that
utilizes only one display. To
check if this is the problem,
make sure that both knobs
change the display when both
displays are showing a number
and the high security mode is
disabled.
2. Check the wiring and plug con-
nections between the encoder
boards and the control board.
(Plug J2) See the Wiring
Diagram.
1. Make sure the DIP switches on
the control board are NOT set
for the high security mode. The
high security mode disables the
encoder controls. See the
Operation Section
.
2. Check the wiring and plug con-
nections between the encoder
boards and the control board.
(Plug J2) See the Wiring
Diagram.
1. Perform the
Keypad Resis-
tance Test.
2. The display board may be
faulty.
3. The control board may be
faulty.
1. Perform the
Encoder Board
Test
.
2. The control board may be
faulty.
1. Perform the
Encoder Board
Test
.
2. The control board may be
faulty.
FUNCTION PROBLEMS (Continued)
CAUTION
If for any reason you do not understand the test procedures or are unable to perform the tests/repairs safely, contact the Lincoln Electric
Service Department for technical troubleshooting assistance before you proceed. Call 216-383-2531 or 1-800-833-9353.
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