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Table of Contents
December 2021
Service Manual
MDE 252 Rev. 1
Table of Contents
2.5
DC Output Voltage Not Available at the Actuator Terminals ........................ 23
2.6
The Actuator Does Not Work with Remote Controls .................................... 24
2.7
The Motor is Very Hot and Does Not Start ................................................... 24
2.8
The Motor Runs but the Actuator Does Not Move the Valve ........................ 25
2.9
The Manual Override Cannot Be Engaged .................................................... 26
2.10
The Valve Does Not Seat Correctly .............................................................. 27
2.11
Excessive Torque for Valve Operation .......................................................... 27
2.12
The Actuator Does Not Stop in Fully Open or Fully Closed Position............... 27
2.13
The Numeric Position Display Indicates "---" ................................................. 27
2.14
The Electrical Power is off and Numeric Display is Off .................................. 28
2.15
Replacement of the 9 V Lithium Battery ...................................................... 28
2.16
2.17
Instruction to Disconnect C_GRID Connectors ............................................ 32