|CAUTION Before starting, read the maintenance safety section in the OPT100 User Guide (M211858EN). Familiarize yourself with the safety requirements of the installation site.
|CAUTION When performing the replacement outdoors, make sure weather conditions allow safe and clean maintenance. The spare parts and the interior of the DGA monitor must remain dry and clean to avoid equipment damage and contamination of the measurement system.
|Wear protective eyewear and gloves.
Follow the uninstallation procedure as described in the OPT100 User Guide
(M211858EN) up to the point where you select Finish to end the uninstallation sequence.
This empties the DGA monitor of oil and allows it to be successfully re-initialized after the repair is complete.
Open the OPTPSU power supply cabinet and turn off switch S1 and then circuit breaker F1. This turns off DC power to the DGA monitor. Make sure the DC OK
LED on the power supply unit turns off. Close the power supply cabinet when done.
- Open the DGA monitor cabinet and verify that the LEDs on the door and any LEDs inside the cabinet are off (= power is off). Let the device cool down for 15 minutes before continuing.
- Pull out the cable tray cover to remove it.
- Follow the MHT411 connection cable to connector X16 on the Control Unit. Note the orientation of the connector. Pull on the connector to disconnect it.