User manual

Maintenance 57
Emerson Energy Systems MFA150 Power System  NT6C28C User Manual
Procedure 2 – Replacing the NT6C14PG meter display card ( continued )
Step Action
14 If the reading on the meter display of the control and distribution
panel is off by more than 1% of what it should be, slowly rotate
potentiometer R30 (located on the right side of the meter display
card) clockwise or counterclockwise until the reading is within 1% of
what it should be.
15 Disconnect the external digital multimeter connected in step 12 and
close the front door of the control and distribution panel.
–end–
Figure 20 – Setting the S3 dip switches on the meter display card
Edge of meter display card
ON
OFF
6
5
4
32
1
S3
R30
Adding or replacing a rectifier
WARNING
Precautions to take to avoid service interruptions
When installing a rectifier, the FLOAT and EQUALIZE
voltages must be set according to the type of batteries
used with the system. Failure to set these voltages
properly may result in battery under charging or over
charging and battery damage.
Adding a rectifier
Add a rectifier as described in Procedure 3 for an MPR15, MPR25 or
Helios Rectifier 25/48, or Procedure 4 for a Helios Rectifier 50/48.
Procedure 3 – Installing an MPR15, MPR25 or Helios Rectifier 25/48
Step Action
1
Using a flat blade screwdriver lossen the captive screws on the
rectifier retaining bar of the rectifier and swing it down.
2
Remove the rectifier blank filler plate by putting a finger in the hole,
lifting it up, and pulling it out towards you.
3
With the angle up and oriented towards the rear of the shelf, put the
blank filler on the bottom of the shelf.
Note: If a rectifier is removed, reinstall the blank plate to meet
regulatory requirements.
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