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Section 8 - Micropanel
Figure 144 - Service key
Service key operation
The SERVICE key allows viewing data related to the
internal function of the chiller system electronics. Data
such as circuit board output status as controlled by the
Chiller Control software while operating can be viewed
and compared to actual chiller operation in the event
servicing is required. The SERVICE key allows con-
trolling of analog and digital outputs for troubleshoot-
ing purposes when the unit is not running. The Unit
Serial Number and Optimized IPLV Control mode are
also entered using the SERVICE key.
The
▲▼
(ARROW) keys allow scrolling through the
displays. The
▼
(ARROW) key scrolls through the
displays in the forward direction.
When the SERVICE key is pressed, the following mes-
sage will appear:
SERVICE MODE XXXX
PRESS ENTER KEY TO CONTINUE
XXXX will display a password, if a numerical pass-
word is entered.
278
Service key
Pressing the
vice Mode operation. All control board I/O will be
viewable in this mode. No outputs can be changed. For
troubleshooting or start-up commissioning purposes,
the Chiller Micro Board and some VSD outputs can be
toggled or changed by turning off the UNIT SWITCH,
pressing the SERVICE key, entering password 9675,
and pressing the
is entered, the Digital Outputs (DO) can be toggled by
pressing the
be programmed to output a specific value using the
keypad and programming in the desired value, which
will usually be noted as a % or VDC. If the UNIT
SWITCH is turned back on, the chiller will revert to
normal viewable only control.
Displays can be viewed by pressing the ▲and
ROW) keys. The
displays in the forward direction.
The
◄
and
►
data section to data section to avoid scrolling sequen-
tially through all the data. Once in a data section, the
▲and
▼
(ARROW) keys allow scrolling through the
data under the section. Pressing the
ROW) keys at any time moves to the top of the next
data section.
Form 201.23-NM2
Issue date: 12/19/2023
SERVICE
KEY
LD10605
(ENTER) key allows "view only" Ser-
(ENTER) key. Once the password
(ENTER) key. The Analog Outputs can
▼
(ARROW) key scrolls through the
(ARROW) keys allow jumping from
◄
▼
(AR-
►
and
(AR-
Johnson Controls
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