GERAFT LOGIQ P9/P7
D
IRECTION 5604324, REVISION 11 DRAFT (JANUARY 24, 2019) SERVICE MANUAL
10-32 Section 10-9 - When There’s Too Much Leakage Current...
Section 10-9
When There’s Too Much Leakage Current...
10-9-1 Earth and/or Enclosure Fails
Check the ground on the power cord and plug for continuity. Ensure the ground is not broken, frayed,
or intermittent. Replace any defective part. Tighten all grounds. Ensure star washers are under all
ground studs. Inspect wiring for bad crimps, poor connections, or damage. Test the wall outlet; verify it
is grounded and is free of other wiring abnormalities. Notify the user or owner to correct any deviations.
As a workaround, check the other outlets to see if they could be used instead.
NOTE: No outlet tester can detect the condition where the neutral wire and the grounding wire are reversed. If
later tests indicate high leakage currents, this should be suspected as a possible cause and the outlet
wiring should be visually inspected.
10-9-2 Probe Fails
• Test another probe to isolate if the fault lies with the probe or the scanner.
NOTE: Each probe will have some amount of leakage, dependent on its design. Small variations in probe
leakage currents are normal from probe to probe. Other variations will result from differences in line
voltage and test lead placement. The maximum allowable leakage current for body surface contact
probe differs from an inter-cavity probe. Be sure to enter the correct probe type in the appropriate space
on the check list.
• Test the probe in another connector to isolate if the fault lies with the probe or the scanner. If
excessive leakage current is slot dependent, inspect the system connector for bent pins, poor
connections, and ground continuity.
If the problem remains with the probe, replace the probe.
10-9-3 Peripheral Fails
Tighten all grounds. Ensure star washers are under all ground studs.
Inspect wiring for bad crimps, poor connections, or damage.
10-9-4 Still Fails
If all else fails, begin isolation by removing the probes, external peripherals, and then the on-board
peripherals one at a time while monitoring the leakage current measurement.
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