The CVM or CVMT have been replaced and now the meter does not work properly. In addition, User verified that meter has control power but there are dashes across the display as shown below:
CVM, CVMT (CM3 and CM4 display)
CM3 and CM4 display
Replacing a CVM (Current/Voltage module) OR CVMT (Current/Voltage Module Transient)
If the user did not turn off control power to the CM3 or CM4 while replacing the CVM/CVMT then it's possible that a surge or arc occurred during this process. However, if the control power was turned off for the CM3 or CM4 while customer replaced the CVM/CVMT follow the resolution below.
NOTE: CM3000 or CM4000 meter has to be turned off before replacing the CVM/CVMT. (Failure to do this can result in damage to meter or arc)
The proper procedure to replace the CVM/CVMT is mentioned in FA203019
*Warning: Installation and maintenance of this device should only be performed by qualified, competent personnel that have appropriate training and experience with high voltage and current devices. Failure to follow the instructions / warnings in the Meter Installation Guide can result in permanent damage to the meter, severe injury or death.
If control power was turned off to the CM3 or CM4 while the user replaced the CVM/CVMT, then user should turn off control power and check the pins on the back of the CVM/CVMT to make sure the pins are not bent or damaged. If the pins are bent the user can attempt to straighten them out and reconnect the CVM/CVMT then test the meter again.
If the issue remains, check the status of the Maintenance LED on meter. If the Maintenance LED is illuminated red, the user will need to send the meter in for repair.