The EDM-930 shows a black screen and a “Data Communication Error” message at start up or during operation. Check the J1(P1) 25 pin Power/Option connector to see if anything is pinned into pins #11 and #24. If so remove these. Retry. If you still receive the“Data Communication Error” message, then the EDM will need to come in for repair. Please call Technical Support at 800-345-4574 for a RMA number before sending in.

Catastrophic errors. The only option the user has is to power the unit off and return it to JPI for repair.

Call Technical Support at 800-345-4574 for a RMA number before sending in.

Catastrophic errors. The only option the user has is to power the unit off and return it to JPI for repair.

Call Technical Support at 800-345-4574 for a RMA number before sending in.

The Hobbs data has been corrupted. The Hobbs meter will be cleared.

Transient warning message. If it persists, return the unit to JPI for repair.

Call Technical Support at  800-345-4574 for a RMA number before sending in.

Power down the instrument and power up again.

Calibration error. Return unit to factory. Call Technical Support at 800-345-4574 for a RMA number before sending in.

Calibration error. Return unit to factory. Call Technical Support at 800-345-4574 for a RMA number before sending in.

Calibration error. Return unit to factory. Call Technical Support at 800-345-4574 for a RMA number before sending in.

Internal communication error. Return unit to factory. Call Technical Support at 800-345-4574 for a RMA number before sending in.

Internal communication error. Return unit to factory. Call Technical Support at 800-345-4574 for a RMA number before sending in.

Calibration error. Return unit to factory. Call Technical Support at 800-345-4574 for a RMA number before sending in.

Low. Measurement under range.

High. Measurement over range.

Dashes indicate no FF transducer signals.

Open probe. Wiring to probe is open circuit. Check wiring and crimps. Swap probes to troubleshoot.

Bad probe. Erratic reading. May be poor electrical connection. Swap probes to troubleshoot.

Dashes indicate no FF transducer signals.

Zero’s indicate FF is too low to register.

‘Change’ tapped during self test. Tap ‘Change’ again later.

Not an error. Hobbs on. RPM exceeds the Hobbs RPM enable value.

Not and error. Memory on. Recording is enabled when EGT exceeds 500 F or the RPM exceeds the Hobbs RPM value.

“Configuration Error” on the 930. “Config Err” on the 900.

If the 900/930 is an ‘experimental’ model then reload the configuration in the EDM. Then power up the 900/930 when done. If the ‘Config Err’ message still comes up then the CPU board has an issue and the EDM will need to come in for repair.

If the 900/930 is a ‘primary’ unit, then follow the ‘key’ change procedure and remove the ‘key’ in the unit. This key is located under the EDM’s label. After following the steps in the Key procedure, and it still comes up with the error, then it will need to come in for repair – a CPU board issue.

** The Primary Key Installation Procedure can be found below. Please click the link:

Transient warning message. If it persists return for re-calibration.