Section 33 - Diagnostics And Troubleshooting - Johnson Controls YORK OPTIVIEW YK Series Service Instructions Manual

FORM 160.54-M1

SECTION 33 - DIAGNOSTICS AND TROUBLESHOOTING

The problems that could be encountered in the OptiV-
iew™ Control Center are in the following categories:
• Keypad
• Display
• Serial Input/Output (I/O)
• Digital Input/Output (I/O)
• Analog Inputs
There is a Diagnostic and associated Troubleshooting
Procedure for each category. They are described on the
following pages. Each diagnostic is accessed from the
DIAGNOSTICS MAIN Screen, which is entered using
the procedure below. If there is an OptiView™ Control
Center problem, determine the category of the prob-
lem. Then perform the applicable diagnostic. If the
diagnostic reveals a malfunction, perform the trouble-
shooting procedure to locate the defective component.
There are several documents that must be referred to
while performing the Diagnostics and Troubleshooting
procedures. Each procedure references the Section and
figures of this manual that describe the operation of
the component being tested. Also, the applicable Op-
tiView™ Control Center wiring diagram must be used
as listed in the Associated Literature table at the front
of this manual.
There are two versions of the Diagnostics screens
available as follows:
1. Shown in Figure 90 on Page 231 through Figure
99 on Page 279. These screens are used during
the diagnostics and troubleshooting process. They
JOHNSON CONTROLS
allow output states to be changed. Access the DI-
AGNOSTICS MAIN Screen as follows:
a. The chiller must be stopped.
b. Place Compressor Start/Stop switch in the
Stop-Reset position (O).
c. Ensure the Compressor motor current is 0%
FLA.
d. Log in at SERVICE access level using access
code 1 3 8 0.
e. Move Microboard Program Switch SW1-4
(Microboard 031-01730-000);
(Microboard 031-02430-000 or 031-02430-
001) to the ON position. A watchdog reset
will occur and the boot-up process will com-
mence. At the completion of the boot-up pro-
cess, the DIAGNOSTICS MAIN Screen will
appear.
If the Program Switch is moved to the ON
position before step 4 above is performed,
the LOG IN key will be displayed and
logging in at SERVICE access level must
be performed before the Main Screen is
displayed.
2. Not shown. Available when logged in at SER-
VICE access level, whether the chiller is running
or not. Accessed from the SETUP Screen via the
SETPOINTS Screen. There are two screens avail-
able that allow the Analog Input voltage levels and
Digital I/O states to be monitored. These screens
are preceded by a general screen that provides the
installed software versions.
SW1-3
33
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