JOHNSON CONTROLS
131
SECTION 2 – OPTIVIEW CONTROL CENTER
FORM 160.69-O1
ISSUE DATE: 9/30/2012
2
Cycling shutdown when displayed in orange charac-
ters; Safety shutdown when displayed in red charac-
ters. The Control center is configured for auto-restart
or manual restart after power failure by a qualified
Service technician following instructions in YORK
Service Manual 160.69-M1.
“THRUST BEARING #1 – PROXIMITY PROBE
CLEARANCE”
The chiller (both compressors) has shutdown because
the clearance between Compressor #1 high speed
thrust collar and the tip of the proximity Probe has
increased > +10 mils (instantaneous) or decreased >
-25 mils (for 2 continuous seconds) from the Refer-
ence Position. The minimum allowed clearance is 23
mils. Therefore, if the Reference Position is < 47 mils,
the shutdown will occur when the actual position is
< 22 mils. The chiller cannot be started until the spe-
cial reset procedure is performed as referenced in the
CAUTION below.
With software version C.OPT.11.03.01.004 (or later),
if compressor #1 is locked-out using the Lockout key
on the Capacity Compressor Cycling Screen, this fault
does not cause compressor #2 to shutdown or prevent
it from starting. When this fault occurs on a locked-out
compressor, it is displayed as a warning. This allows
the user to know that a fault exists on the locked-out
compressor. The condition must be corrected prior to
the lockout being removed from the compressor. If it
is not, the warning condition will revert back to a shut-
down as soon as the lockout is removed and will cause
the chiller to trip.
If equipped with software version C.MLM.11.02.xxx
(and later) or C.OPT.11.02.300 (and later), the opera-
tion is as follows: the clearance is only checked during
the last 20 seconds of “System Prelube”, during “Sys-
tem Run” and during “Coastdown”. Therefore, the
fault is only detected during those periods. Also, the
+10mil threshold must be exceeded for 2 continuous
seconds (instantaneous with previous software).
“THRUST BEARING #2 – PROXIMITY PROBE
CLEARANCE”
The chiller (both compressors) has shutdown because
the clearance between Compressor #2 high speed
thrust collar and the tip of the proximity Probe has
increased > +10 mils (instantaneous) or decreased >
-25 mils (for 2 continuous seconds) from the Refer-
ence Position. The minimum allowed clearance is 23
mils. Therefore, if the Reference Position is < 47 mils,
the shutdown will occur when the actual position is
< 22 mils. The chiller cannot be started until the spe-
cial reset procedure is performed as referenced in the
CAUTION below.
With software version C.OPT.11.03.01.004 (or later),
if compressor #2 is locked-out using the Lockout key
on the Capacity Compressor Cycling Screen, this fault
does not cause compressor #1 to shutdown or prevent
it from starting. When this fault occurs on a locked-out
compressor, it is displayed as a warning. This allows
the user to know that a fault exists on the locked-out
compressor. The condition must be corrected prior to
the lockout being removed from the compressor. If it
is not, the warning condition will revert back to a shut-
down as soon as the lockout is removed and will cause
the chiller to trip.
If equipped with software version C.MLM.11.02.xxx
(and later) or C.OPT.11.02.300 (and later), the opera-
tion is as follows: the clearance is only checked during
the last 20 seconds of “System Prelube”, during “Sys-
tem Run” and during “Coastdown”. Therefore, the
fault is only detected during those periods. Also, the
+10mil threshold must be exceeded for 2 continuous
seconds (instantaneous with previous software).
This shutdown must be evaluated by a
qualified Service Technician prior to
starting the chiller. Starting the chiller
without this evaluation could result in
severe compressor damage. To prevent the
chiller from starting without the proper
evaluation, restart is inhibited until the
clearance is within acceptable limits and a
special reset procedure is performed by the
Service Technician. The evaluation and
reset procedure are contained in YORK
Service Manual 160.69-M1.
“THRUST BEARING #1 – PROXIMITY PROBE
OUT OF RANGE”
The chiller (both compressors) has shutdown because
the clearance between compressor #1 high speed thrust
collar and the tip of the proximity Probe has decreased
to <17 mils. The chiller cannot be started until the spe-
cial reset procedure is performed as referenced in the
CAUTION below.
With software version C.OPT.11.03.01.004 (or later),
if compressor #1 is locked-out using the Lockout key
on the Capacity Compressor Cycling Screen, this fault
does not cause compressor #2 to shutdown or prevent
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