J.P. Instruments EDM-900 User Manual

For Your Safe Flight ............................................. Page 53
Troubleshooting the EDM
Diagnostic Testing on Startup and During Flight
When your EDM is first turned on, it tests internal components,
calibration and integrity of the probes. Most alarms are disabled until the
engine has been started.
During flight, probes are constantly checked for inconsistent or
intermittent signals. A faulty channel or probe encountered during start-up
or during flight will be deleted from the sequence, producing a missing
column or blank digital data.
Diagnostic Messages
The following displays indicate malfunctions in the system:
Startup and Operational Diagnostics
0.0 GPH
Zero’s indicate Fuel flow is too low to register
--- GPH
Dashes indicate No fuel flow transducer signals
--- H.M
Dashes indicate No fuel flow transducer signals
OPEN PRB
Open probe. Wiring to probe is open circuit. Check
wiring and crimps. Swap probes to troubleshoot.
BAD-PRB
Bad probe. Erratic reading. May be poor electrical
connection. Swap probes to troubleshoot.
Red ‘X’ drawn
through a gauge
Gauge is non-functional.
CAL ERR
Calibration error. Return unit to factory.
DSP XXX
Internal communication error. Return unit to factory.
COMM ERR
Internal communication error. Return unit to factory.
NO I 5 MV
Calibration error. Return unit to factory.
NO 50MV
Calibration error. Return unit to factory.

J.P. Instruments EDM-900 Specifications

General

Brand	J.P. Instruments
Model	EDM-900
Category	Control Panel
Language	English