Installation manual

610C-001 INSTALLATION MANUAL DOCUMENT No. 070906 REV. 1.2

INSIGHT INSTRUMENT CORP. BOX 122, FORT ERIE, ONTARIO, L2A 5M6

Trouble-shooting

The following is a compilation of the common symptoms and causes of problems which may be experienced

with the GEM Systems. Close examination of these symptoms should assist in identifying the cause of the

problem.

Symptom: The G3 series Display does not illuminate.

Cause: No ground return at Pin 15, of the edge connector either from the engine case or from airframe ground

Symptom: The G3 series Display does not illuminate.

Cause: Voltage is missing at Pin S, of the edge connector from the circuit breaker or bus.

Symptom: One or more columns will not illuminate.

Cause: Try recycling power to check the Display. If all columns do not illuminate, the GEM series display has

been damaged or is inoperative.

Symptom: One or more columns will not illuminate.

Cause: Check the probe connections, the display will blank columns with poor EGT and CHT connections. Col

umns 5 and 6 shouldn’t illuminate on a 4 cylinder engine. Turn top knob on G3 to the probe analysis page

to check probe Integrity.

For 8 foot harness on probe analysis page resistance should be 8 - 3 EGT / 1 - 6 CHT

For 24 foot harness on probe analysis page resistance should be 26 - 10 EGT / 4 - 18 CHT

Symptom: No EGT in one or more columns.

Cause: Errors in harness wiring. Visually check probe connections and polarity. Check for probe continuity

at the display connector. The resistance of the lead wire is approximately 1 ohm per foot. Take extreme care

to not damage the connector terminals with the meter probes. Turn top knob on G3 to the probe analysis

page to check probe Integrity.

Symptom: No CHT in one or more columns.