BENSHAW RediStart EXEXMVRMX3 Series, User Manual

Page: 180 / 222

8.9.4 Conducting a BIST
To conduct a BIST Test , follow these steps:
•
Press the [MENU] button six times to scroll to th FUN group.
•
Press the [DOWN] button five times to get to FUN 22.
•
Press the [ENTER] button.
•
Press the [UP] button seven times to set parameter to "Std BIST".
•
Press the [ENTER] button to begin the BIST test.
8.9.5 Begin BIST Test
Once started, the EXMVRMX
3
will log an event log 193 - "Std BIST Enter" in the event recorder and check the state of the disconnect
switch. If the disconnect switch is closed, the EXMVRMX
3
will display:
8.9.6 RUN relay and In-line Test
The EXMVRMX
3
will begin the test sequence by operating the in-line contactor and monitoring the 120VAC feedback for proper
operation. The RUN assigned relays are cycled on and off once and the feedback from an inline contactor is verified. In order to have a
valid inline contactor feedback, a digital input (I/O 01 – 08) needs to be set to "Inline Confirm" and the input needs to be wired to an
auxiliary contact of the inline contactor. The feedback is checked in both the open and closed state. If the feedback does not match the
state of the RUN relay within the amount of time set by the Inline Config (I/O 24) parameter an “Inline” fault (Fault #49) will occur.
z
NOTE: If no digital input is assigned as an Inline Confirm input this test will always pass.
z
NOTE:
If the Inline Config (I/O 24) parameter on page 96 is set to "Off" this test will be skipped. During the in-line contactor test,
the EXMVRMX
3
will display the following:
8.9.7 UTS relay and Bypass Test
In this test, the dedicated bypass relay (if assigned) and UTS assigned relays are cycled on and off once and the feedback from a bypass
contactor is verified. In order to have a valid bypass contactor feedback, the dedicated bypass confirm input and any other inputs set to
bypass confirm needs to be wired to an auxiliary contact of the bypass contactor. The feedback is checked in both the open and closed
state. If the feedback does not match the state of the UTS relay within the amount of time set by the Bypass Feedback (I/O 25) parameter
a “Bypass/2M Fault” (Fault #48) will occur.
z
NOTE
: If the dedicated bypass relay is set to "fan" and if no digital inputs are assigned as a Bypass Confirm input this test will
always pass.
170
8 - TROUBLESHOOTING & MAINTENANCE
Open disconnect
to begin BIST
FUN: Misc Command
22
Std BIST
BIST Mode
Inline Closed
BIST Mode
Inline Open
BIST Mode
Bypass Closed
BIST Mode
Bypass Open