Auxiliary Control Boards (Ccb1, Ccb2, Gcb1, Ehb1, And Erb1) Output Relays; Keypad/Display; Remote Keypad Display Option - Daikin MicroTech II Installation And Maintenance Manual

General Description
Auxiliary Control Boards (CCB1, CCB2, GCB1,
EHB1, and ERB1) Output Relays
Binary outputs BO1 and BO2 control high power Form A
electromechanical relays mounted on the auxiliary control
board. The output terminals of these relays are connected to
the binary output terminals located on the left side of the
auxiliary control board. These relays are designed to switch
loads with either of the following characteristics:
• 1 hp 120 VAC
• 25 A resistive @ 120 VAC
Note – For this product application, place both jumpers on the
boards just below the upper right corner of the RS-485
Communication Card on the right most pins. If these are
not positioned correctly, the devices controlled by binary
outputs BO1 and BO2 will not function properly.
Binary outputs BO3 through BO5 and BO7 through BO9
control low power Form A electromechanical relays mounted
on the auxiliary control board. The output terminals of these
relays are connected to the binary output terminals located on
the left side of the auxiliary control board. These relays are
designed to switch loads with either of the following
characteristics:
• 1/10 hp 120 VAC
• 5 A resistive @ 120 VAC
Binary output BO6 controls one low power Form C
electromechanical relay mounted on the auxiliary control
board. The output terminals of this relay are connected to the
binary output terminals located on the left side of the auxiliary
control board. This relay is designed to switch loads with
either of the following characteristics:
• 1/10 hp 120 VAC
• 5 A resistive @ 120 VAC

Keypad/Display

The keypad/display, shown in Figure 7 on page 10, has eight
keys and a 4-line by 20-character LCD display. The keypad/
display is the operator interface to the MCB. All operating
conditions, system alarms, control parameters, and schedules
can be monitored from the keypad/display. If the correct
password is entered, adjustable parameters or schedules can be
modified. For information on using the, keypad/display refer
to the "Getting Started" section of the applicable operation
manual (Refer to Table 1 on page 1).
10
Figure 7. Keypad/display

Remote Keypad Display Option

A unit may be equipped with a remote keypad/display option.
When this is the case, either the local unit keypad/display or
the remote keypad/display is active. When the selector switch
on the remote keypad/display control board in the unit is
switched to the "local" setting, the local keypad/display is
active and the remote keypad/display is disabled (the "local"
LED on the board is ON and the "remote" LED on the board is
OFF). When the selector switch is switched to the "remote"
setting, the remote keypad/display is active and the local
keypad/display is disabled (the "local" LED on the board is
OFF and the "remote" LED on the board is ON).
Note – When the selector switch position is changed, the
selected keypad/display goes through the "normal"
power up sequence before becoming active. Generally
this takes about 60 seconds.
The operation of the remote keypad is identical to that of the
local keypad/display as described in the appropriate operation
manual for the unit. Refer to Table 1 on page 1.
Unit can be started from a remote location. Severe
personal injury or death can occur.
When the remote keypad is enabled, the unit can be started
from a remote location. Before servicing unit, make sure the
keypad/display selector switch is in the "local" position ("local"
LED on the remote keypad/display control board is ON and the
"remote" LED is OFF) or that remote keypad is physically
disconnected. If the local unit keypad/display is blank, assume
that the remote keypad display is enabled.
WARNING
Daikin IM 696-4