Johnson Controls YORK YK MaxE, Operation Manual

Page: 146 / 184

JOHNSON CONTROLS
146
FORM 160.54-O1
optiView Control Center
“VSD – FREQUENCY > 0Hz”
(Software version C.MLM.01.14.xxx (and later) or
C.OPT.01.14.306 (and later))
This start inhibit is set whenever the chiller is shutdown
and a compressor motor Variable Speed Drive (VSD)
Output Frequency of greater than 0Hz is detected. This
fault is released and the chiller can be started after the
frequency is at 0Hz and the COMPRESSOR Switch is
placed in the STOP-RESET (O) position. The Oil Pump
is started (with a starting frequency of 45Hz) as soon as
this fault is detected. A System Coastdown is performed
whenever this fault is released.
“LCSSS – HIgH TEMPERATURE PHASE X -
STOPPED”
(Mod. “B” Solid State Starter only)
The chiller is stopped and the Liquid Cooled Solid
State Starter Logic/Trigger Board has detected that the
temperature of phase A, B, or C (designated as X in this
message) Silicon Controlled Rectifier (SCR) module is
greater than 110°F. The starter cooling pump will run
and the chiller will be inhibited from starting until the
temperature decreases to less than 109°F.
WarNiNg Messages
“ WARnIng – REAL TIME CLOCK FAILURE ”
During the initialization process that occurs when power
is applied to the Control Center, test data is written to a
location in the BRAM battery backed memory device
(IC location U52 on Microboard). This data is then read
from the BRAM and compared to the test data. If the
read data is not the same as that which was written to the
device, it is assumed the BRAM and Real time Clock
operation is defective and this message is displayed.
The BRAM should be replaced by a qualified Service
Technician. This message automatically clears when the
BRAM problem has been solved.
“
WARnIng – COnDEnSER OR EVAPORATOR
XDCR ERROR ”
The Evaporator pressure Transducer is indicating a
higher pressure than the Condenser pressure Transducer
after the chiller has been running for 10 minutes. This
is indicative of a Condenser or Evaporator Transducer
failure. This message will be displayed until the condi-
tion clears and the WARNING RESET Keypad key is
pressed in OPERATOR (or higher) access mode. Con-
dition not checked in Brine mode.
“ WARnIng – REFRIgERAnT LEVEL OUT OF
RAngE
”
(Flash Memory Card version C.MLM.01.05C.xxx and
earlier and “P” compressors with C.MLM.04.01B and
earlier)
The output of the Condenser Refrigerant Level Sensor
is greater than 5.1VDC. This is indicative of a Level
Sensor failure. While this condition exists, the Refriger-
ant Variable Orifice is driven to the full open position.
This message automatically clears when the Refrigerant
Level sensor output is within range.
“ WARnIng – STAnDBY LUBE – LOW OIL PRES-
SURE ”
A minimum of 15 PSID of oil pressure was not achieved
in the first 30 seconds of a Standby Lubrication cycle, or
the pressure decreased below this value during the re-
mainder of the cycle. This message will be displayed and
no further Standby Lubrications will be performed until
the WARNING RESET key is pressed in OPERATOR
(or higher) access mode.
“ WARnIng – SETPOInT OVERRIDE ”
A blank BRAM battery-backed memory device (IC
location U52 on Microboard) or a failure of this device
was detected during the initialization process that occurs
when power is applied to the Control Center. Due to this
failure, any or all of the programmed Setpoints could have
been corrupted. Therefore, all Setpoints have been auto-
matically changed to their Default values. All Setpoints
will have to be programmed to their desired values. This
message will clear when the WARNING RESET key is
pressed in OPERATOR (or higher) access mode.
“ WARnIng – COnDEnSER – HIgH PRESSURE
LIMIT ”
The Condenser Pressure exceeds the High Pressure Warn-
ing Setpoint threshold, programmed by a Service technician
logged in at SERVICE access level. While this condition
is in effect, the Pre-rotation Vanes are inhibited from
further opening. This message automatically clears and
the Vanes are permitted to open when the Condenser
pressure decreases to 5 PSIG below the Setpoint.
“ WARnIng – EVAPORATOR – LOW PRESSURE
LIMIT ”
The Evaporator pressure has decreased to the Warning
threshold. This threshold is fixed in Water cooling appli -
cations. In Brine cooling applications, the threshold is a fixed
amount above the programmable safety shutdown threshold.
The Safety threshold in Brine applications is determined by
the Brine solution and is determined by the YORK Factory.
While this condition is in effect, the Pre-rotation Vanes are