24
6.2 PC Board Troubleshooting
SYMPTOM
POSSIBLE CAUSE
CORRECTIVE ACTION
Motor fuse blows continuously .
Motor wired improperly.
Correct. Refer to the certified
electrical schematic.
Motor jammed.
Inspect & replace.
Auger seized up in sampler.
Inspect & replace.
Mis-alignment of sampler mounting
flanges.
Check mounting of sampler to
ensure no binding is occurring.
Timer T-1 defective.
Inspect & replace. Refer to Section
4.1.7.
Sampler motor tries to start but
does not run (control resets).
Low voltage power supply.
107 vac minimum for 110/120 vac.
215 vac minimum for 220/240 vac.
Inadequate power supply wiring.
Monitor voltage when motor starts.
It should not drop below 107 vac, or
215 vac.
Mis-alignment of sampler mounting
flanges.
Check mounting of sampler to
ensure no binding is occurring.
Sampler digital display timer T-1
does not illuminate when in auto
Motor fuse blown.
Replace. Refer to Section 4.1.9.2.
mode.
Defective PC board.
Replace.
Motor and/or solenoid times cannot
be adjusted.
Defective PC board.
Replace.
Solenoid LED illuminates but no
Defective PC board.
Replace.
full line voltage signal at terminal
#13.
Improper ground wiring.
Correct. See note below.
Motor LED illuminates but no full
Motor fuse blown.
Replace. Refer to Section 4.1.9.2.
line voltage signal at terminal #10.
Defective PC board.
Replace.
Improper ground wiring.
Correct. See note below.
NOTE:
GSS-U SAMPLERS REQUIRE THE MODE SWITCH TO BE POSITIONED ON SETTING "2" (TWO).
IF THE MODE SETTING IS NOT CORRECTLY SET, TURN POWER OFF TO THE CONTROL PRIOR TO RE-
SELECTING. THE PC BOARD WILL ONLY CHANGE MODES WHEN POWER IS INITIALLY APPLIED.
NOTE:
SAMPLER MAY FAIL TO OPERATE OR OPERATE IMPROPERLY IF THE DC GROUND TRACE ON
THE PC BOARD IS NOT ISOLATED FROM THE AC GROUND OR NEUTRAL WIRING. REFER TO THE
CERTIFIED ELECTRICAL DRAWING(S) FOR AC GROUND CONNECTIONS.
