Capacitor Board - Carrier 50JC04-06 Service And Maintenance Instructions

Capacitor Board

WARNING
ELECTRICAL SHOCK HAZARD
Failure to follow this warning could result in personal injury, or
death.
Unit is equipped with capacitors that take time to discharge
after power disconnect. Before performing service or
maintenance operations on this unit, ensure the power has
been off to the unit and locked out for at least 5 minutes.
After removal of the high voltage cover, ensure all LED
lights are off.
The Capacitor board is a support board that helps stabilize the DC
bus used by the drive board. There is a green LED mounted on the
board to indicate it has live voltage. The polarity is sensitive since
this is a DC voltage. Inspect the capacitors for bulging when
TERMINAL LABEL
DC+OUT, DC-OUT
DC+IN, DC-IN
DC-IN
Fig. 53 — Capacitor Board
Table 11 — Capacitor Board Inputs/Outputs
DESCRIPTION
DC Bus Out to Drive Board
DC Bus In from Drive Board
troubleshooting. See Fig. 53 and Table 11 below for more details
on the capacitor board.
LINE REACTOR
The line reactor is only used on 575 volt units. It is mounted and
used in place of the filter board and capacitor board. The line reac-
tor protects the drive board from noise and spikes on the supply
voltage. This is a three-phase line reactor so there is a filter for
each line of the three-phase power. There are two terminals for
each phase and not direction sensitive. For troubleshooting, check
the voltage for each phase going in and out of the line reactor to
ensure they are the same.
CHOKE
The choke is the heaviest component and used to protect the DC
bus from voltage spikes. This is wired between the +DC output of
the drive board and the +DC input to the capacitor board. It is not
direction sensitive so the wires can be swapped. Make sure the
voltage is the same leaving the drive board as entering the capaci-
tor board.
DC+OUT
DC-OUT
DC+IN
TYPE
DC High voltage
DC High voltage
34
CONNECTOR
2x 1/4-in. Quick Connect
2x 1/4-in. Quick Connect