Override Jumper; Fuses - Siemens SED2 VFD Operating Instructions Manual

SED2 VFD Electronic Bypass Option Operating Instructons

Override Jumper

An Override Jumper (J8) is supplied
on the Controller board. Moving this
jumper to the override position
removes the Controller board and its
keypad from the control and closes the
drive output contactor (and the input
contactor if supplied).

Fuses

The Controller board contains a fuse (F1) under its cover (Figure 12). Determine if the fuse F1
needs replacement as follows:
1. If the basic sanity test indicator (Figure 12) is flashing, fuse F1 is okay and no action is
required.
2. Verify that 120 Vac power is available on the secondary side of the Electronic Bypass Option
power transformer (Figure 12). If power is not proper, check the Electronic Bypass Option
components such as:
•
Power transformer
•
Power transformer fuses (F2, F3, and F4). Table 8 provides fuse replacement
information.
3. If power is proper, check fuse F1 as follows:
•
Power down the Electronic Bypass Option.
•
Remove the Controller board cover.
•
Remove fuse F1.
•
Use an ohm meter to check the fuse.
•
Replace fuse F1 if necessary.
NOTE: Replace fuse F1 with an 8 AG, 1/2 amp, 250V, fast-acting instrument fuse such as a
Bussmann AGX1/2 or Littlefuse 361.500.
28
BPEC
J2
J1
J8
OVERRIDE JUMPER
J8 SHOWN IN
NORMAL POSITION
Figure 11. Override Jumper J8 Location and Positions.
BPEC
J2
J1
J8
OVERRIDE JUMPER
J8 SHOWN IN
OVERRIDE POSITION
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