Main Control Board Leds; Auxiliary Control Boards (Ccb1And Ccb2) - McQuay MicroTech II Installation And Maintenance Manual

Figure 3:MCB communication interface
BACnet
MS/TP
BACnet

Main Control Board LEDs

There are a number of LEDs in various locations on the
MCB. These LEDs consist of three groupings. There are 16
Binary Input (BI) LEDs located in the upper left corner of
the MCB. These LEDs are lit when the corresponding
Binary Input is turned ON. For information regarding the
functions of the Binary Inputs refer to "Binary Inputs-Main
Control Board (MCB)" on page 19. There are 16 Binary
Output (BO) LEDs, one located next to each Binary Output
on the right side of the MCB. These LEDs are lit when the
corresponding Binary Output is turned ON. For information
regarding the functions of the Binary Outputs refer to
"Binary Outputs-Main Control Board (MCB)" on page 21.
There are 4 Miscellaneous LEDs. These LEDs provide error
code information and indication of activity on the various
communication channels. Table 3 lists these LEDs with their
functions.
Table 3: Main control board miscellaneous LEDs
RS-485 (LED is ON when activity present on the RS-485 bus)
bus activity indication
RS-232 port Activity Indication (LED is ON when activity present at the RS-232 port)
BACnet/IP port activity indication (LED is ON when activity present at the BACnet/IP Port)
Off
Normal
*Refer to "Troubleshooting Main Control Board (MCB)" on page 35.
6
Unit Terminal Unit Terminal
Block TB2
128
129
130
128
130
IP
10 BASE-T STYLE CONNECTION
SERVICE
TOOL
SERIAL COMM.
LOCATED ON
DEADFRONT
(DB-9 MALE)
LED function
MCB Error Indication*
Battery low or defective
MAIN CONTROL BOARD (MCB)
522 (CLR) N2 +
523 (BLK) N2 -
524 (DRN) REF
A
522 +
B
523 -
RJ-45
MODULAR
JACK
RS-232 PORT
(DB-9 MALE)

Auxiliary Control Boards (CCB1and CCB2)

There are up to two optional auxiliary cooling control boards
(CCB1 and CCB2). Although the input and output functions
on the two boards are defined differently in software, the
boards are physically identical.
The CCB1 and CCB2 are used whenever a unit is equipped
with factory DX cooling (models SWP and SWT). The
CCB1 and CCB2 are not used on units equipped with chilled
water or no cooling.
A typical auxiliary control board is shown in Figure 4 on
page 7. This board receives up to 6 analog and 12 binary
inputs and exchanges information with the MCB via an
RS-485 communication bus.
Left of BACnet/IP port connector
Right of BACnet/IP port connector
Blinking
Location on MCB
Left of RS-485 port connector
Left of RS-232 port connector
McQuay IM 710-1
LED color
Green
Green
Green
Red