JOHNSON CONTROLS
142
FORM 160.79-O3
ISSUE DATE: 11/09/2018
SECTION 2 – OPTIVIEW CONTROL CENTER
“OIL PUMP #2 – PRESSURE TRANSDUCER
OUT OF RANGE”
The Chiller (both compressors) has shutdown because
compressor #2 Pump oil pressure transducer is out of
range (< 0.0 PSIG or >300.0 PSIG). The chiller can
be started after the pressure is within range and the
Operator presses the Clear Faults button.
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.
“OIL SUMP – PRESSURE TRANSDUCER OUT
OF RANGE”
The chiller (both compressors) has shut down because
the Sump oil pressure transducer is out of range (< 0.0
PSIG or >300.0 PSIG). The chiller can be started after
the pressure is within range and the Operator presses
the Clear Faults button.
“OIL PUMP #1 – SETPOINT NOT ACHIEVED”
The chiller (both compressors) has shutdown because
compressor #1 differential oil pressure, as sensed by
compressor #1 Pump transducer and the Sump trans-
ducer, failed to meet the following requirements:
1. The differential oil pressure was <35.0 PSID for
5 continuous seconds during the last 10 seconds
of compressor #1 prelube or during the first 15
seconds of compressor #1 run.
-OR-
2.
After the first 30 seconds of compressor #1 run,
the differential oil pressure was < the Setpoint/
Target oil pressure with the oil pump drive speed
command at 60 Hz for 5 continuous seconds.
The chiller can be started after the Operator presses the
Clear Faults button.
“OIL PUMP #2 – SETPOINT NOT ACHIEVED”
The chiller (both compressors) has shutdown because
compressor #2 differential oil pressure, as sensed by
compressor #2 Pump transducer and the Sump trans-
ducer, failed to meet the following requirements:
1. The differential oil pressure was <35.0 PSID for
5 continuous seconds during the last 10 seconds
of compressor #2 prelube or during the first 15
seconds of compressor #2 run.
-OR-
2.
After the first 30 seconds of compressor #2 run,
the differential oil pressure was < the Setpoint/
Target oil pressure with the oil pump drive speed
command at 60 Hz for 5 continuous seconds.
The chiller can be started after the Operator presses the
Clear Faults button.
“SURGE PROTECTION – EXCESS SURGE”
(Applies only to single compressor operation and if the
Surge Protection SHUTDOWN setpoint is enabled)
The running compressor has shutdown because the
Surge Window Count exceeded the Count Limit
setpoint. If the Surge Protection Extended Run feature
is Disabled, the chiller shutsdown as soon as the count
exceeds the limit. If the Extended Run feature is En-
abled, this shutdown occurs only if the Surge Window
Count exceeds the Count Limit setpoint at completion
of the 10 minute Extended Run period. The chiller can
be started after the Operator presses the Clear Faults
button.
“CONDENSER – HIGH PRESSURE”
The condenser pressure, as sensed by the Condenser
Transducer, has increased to >180.0 PSIG (R134a).
The chiller can be started after the pressure decreases
to < 120.0 PSIG (R134a), and the Operator presses the
Clear Faults button.
“CONDENSER – PRESSURE TRANSDUCER
OUT OF RANGE”
The Condenser Pressure Transducer is indicating a
pressure that is < 6.8 PSIG (R134a), or > 300.0 PSIG
(R134a). This is outside the normal operating range of
the transducer. This is generally indicates a defective
transducer. The chiller can be started after the trans-
ducer is indicating a pressure that is within range and
the Operator presses the Clear Faults button.
