User's Manual

31-3MDR00HB Page 10
Contents (continued)
Page
Draft
Maintenance 49
Maintenance Policy 50
Unscheduled Maintenance 50
Scheduled Maintenance 50
Cleaning the Equipment 50
Security of External Connections 50
Checking the MDR’s Internal Reference Frequency 51
Initiating an Interruptive BIT Test 52
Removing and Refitting the Cooling Fan 54