PPM-350C Troubleshooting
The PPM-350C PON Power Meter was designed for two main purposes: Suit FTTP testing needs and to be easy to use for people who are not necessarily familiar with fiber optics in FTTx. Be used as a standard optical power meter (OPM operation mode).
Solving Common Problems
| Problem | Possible Cause | Solution |
| One of the LEDs remains off. OR One of the LEDs remains green or red even if the status is Warning. | LED is burnt. Verify LEDs (see verifying the LEDs and LCD on page 29). | Contact EXFO. |
| P/F Pressing the button mode does not activate Pass/Fail mode. | Unit is currently nulling offsets, verifying thresholds or verifying LEDs and LCD. The current threshold set contains an unusable (corrupted) value. No threshold sets have been defined. | Let the unit complete the operation. If the unit was verifying LEDs and LCD, press any key to return to your previous mode (Pass/Fail or Normal). See Error Codes and Descriptions on page 31. See Error Codes and Descriptions on page 31. |
| Problem | Possible Cause | Solution |
| The threshold set name is not displayed correctly. | Name contains characters that your unit cannot display. Unsupported characters are replaced with dashes, spaces or “+”. | Rename the threshold set using only supported characters: 0 through 9, A through Z (both lowercase and uppercase) , – (dash) + / . < = > ? [ \ ] _ (underscore) and space For more information on renaming threshold sets, see Configuring Thresholds, Correction Factors, Wavelength List, and Storage Details on page 13. |
| In Pass/Fail mode, impossible to see all wavelengths and some of the LEDs are off. | At least one signal is deactivated (see Selecting a Threshold Set on page 14). | Reactivate the signal (see Configuring Thresholds, Correction Factors, Wavelength List, and Storage Details on page 13). |
Error Codes and Descriptions, ER: error code displayed until you press a key. WR: warning code displayed for 3 seconds, then unit returns to normal.
| Error Code | Description | Solution |
| EMPT | Storage memory is empty, there is nothing to recall. | Store at least one measurement before going in recall mode. |
| FULL | Storage memory is full. | Free some storage space by eleting measurements. |
| LIGH | Light detected while nulling offsets. Nulling is not performed. | Correctly place protective cap on ports, then retry. If the problem persists, contact EXFO. |
| ER 9 | Configuration for storage information is not usable (corruption problem). | Download new storage information (see Configuring Thresholds, Correction Factors, Wavelength List, and Storage Details on page 13). |
| Error Code | Description | Solution |
| ER 10 | Configuration for wavelength list and correction factors is not usable (corruption problem). | Download new wavelength list and correction factors (see Configuring Thresholds, Correction Factors, Wavelength List, and Storage Details on page 13). |
| ER 12/16 | Threshold values are not usable (corruption problem). Would occur: during unit initialization after threshold verification (see Verifying the Integrity of User Information in Memory on page 28) after threshold set selection | Download new threshold sets to your unit. For more information, see Configuring Thresholds, Correction Factors, Wavelength List, and Storage Details on page 13. |
| ER 13 | EEPROM corrupted (would occur during unit initialization). | Unit must be recalibrated. Contact EXFO. |
| ER 17 | No signal is activated for the selected threshold. The error is displayed again if you try to activate the threshold. You must enter the threshold selection mode to select another threshold. This error can be displayed at startup if no threshold signal is selected when shutting down the unit. The threshold signal activation is done through the threshold download application. | Enter the threshold selection mode Activate another threshold. |
| WR 23 | No threshold sets have been defined. Pass/Fail mode cannot be activated. | Download new threshold sets to your unit. For more information, see Configuring Thresholds, Correction Factors, Wavelength List, and Storage Details on page 13. |
| WR 24 | Date and time of the real-time clock are not valid. | Use HHDT to transfer date and time of the real-time clock by configuring the PPM-350C. If the problem persists, you may have to change the real-time clock battery. Contact EXFO for details. |
