York YZ MODEL A, Руководство по эксплуатации и обслуживанию

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JOHNSON CONTROLS
96
FORM 161.01-OM1
ISSUE DATE: 6/8/2018
SECTION 3 - OPTIVIEW™ CONTROL CENTER FUNCTIONS AND NAVIGATION
MESSAGE DESCRIPTION
ISOLATION VALVES - NOT
CLOSED
The optional brine freeze protection motorized isolation valves Close output is ener-
gized > 40 seconds but the feedback from the valve limit switch does not indicate it
closed for 3 continuous seconds. This cycling fault is released when the isolation valves
closed input is energized
LEAVING CHILLED LIQUID –
LOW TEMPERATURE
The Leaving Chilled Liquid Temperature has decreased to the programmed Shutdown
Temperature Setpoint. If the chiller is running when this occurs, a Soft Shutdown is
performed. The chiller will automatically restart when the temperature increases to the
programmed Restart Temperature Setpoint.
MBC- CALIBRATION FAULT
This Cycling Shutdown is displayed when the MBC Calibration has not successfully
completed. It will automatically clear when the MBC calibration is successful.
MBC – FAULT
CONTACTS OPEN
This Safety Shutdown is set when the MBC detects a fault condition and opens a relay
contact which is read by the 03631 I/O Board at TB15-70. The fault is cleared when the
MBC contact closes. If this happens 3 times in a 15 minute period, the fault becomes a
Safety Fault.
MBC - LOW DC BUS VOLTAGE
The MBC DC BUS Voltage has dropped below 300 VDC. The fault will clear when the
voltage rises above 300 VDC
MBC – H RADIAL POSITION
The MBC has measured a severe deviation of the H Bearing position while running.
MBC – J RADIAL POSITION The MBC has measured a severe deviation of the J Bearing position while running.
MBC – K RADIAL POSITION The MBC has measured a severe deviation of the K Bearing position while running.
MBC – SERIAL
COMMUNICATIONS
This Cycling Shutdown is set when an invalid or no response is received from the MBC
to a Modbus command from the panel for 3 consecutive attempts with a 2 second
timeout between attempts. It shall be triggered by the Modbus communications task
when its fault conditions are met (thresholds of consecutive timeouts, ID mismatches,
checksum failures, or error packets). It is released when a valid response is received.
MULTIUNIT CYCLING –
CONTACTS OPEN
The Multiunit Cycling contacts connected to I/O Board TB2-9, have opened to initiate a cy-
cling shutdown. If the chiller is running when this occurs, a soft shutdown will be initiated.
The chiller will automatically restart when the contacts close.
SYSTEM CYCLING –
CONTACTS OPEN
The System Cycling contacts connected to I/O Board TB2-13, have opened to initiate a
cycling shutdown. If the chiller is running when this occurs, a soft shutdown will be initi-
ated. The chiller will automatically restart when the contacts close.
SYSTEM - STARTUP FAILURE
The System has failed to progress from the Startup state for 60 seconds after start. If
this occurs 3 times in 90 minutes the system will lock out on a Safety. The cycling fault
is released when the chiller is stopped.
UPS – LINE LOW BATTERY
VOLTAGE
This cycling fault initiates a soft shutdown if it is set while the chiller state is Running. It
is set during chiller state Running or Soft Shutdown when all of the following are true:
• Battery Voltage Faults setting is “Enabled”
• “Warning – UPS – Line Low Battery Voltage” warning has been set for 60 continuous
minutes
This fault is also set during chiller state Stopped when all of the following are true:
• Battery Voltage Faults setting is “Enabled”
• Control Voltage digital input is high (indicates line power is available)
• Battery Voltage < Line Low Battery Voltage Threshold
It is released when any of the following are true:
• Battery Voltage Faults is Disabled
• Battery Voltage > Line Low Battery Voltage Thr 0.1 V.
VGD ACTUATOR - SERIAL
COMMUNICATIONS
When valid communications do not occur between the microboard and the VGD
actuator for 3 times within 6 seconds. The fault is reset when the communications are
established.
VSD – DC BUS VOLTAGE
IMBALANCE
The VSD’s DC link voltage is continuously monitored. If the 1/2 BUS voltage is not
/- 88 VDC of the 1/2 of the total Bus Voltage then this message is displayed.
Typically this indicates a problem with some of the BUS capacitors.
TABLE 11 - CYCLING SHUTDOWN MESSAGES (CONT'D)