York VSD 292, Руководство по эксплуатации

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JOHNSON CONTROLS
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SECTION 4 - CYCLING SHUTDOWNS
FORM 160.00-O4
ISSUE DATE: 07/31/2019
4
MESSAGE DESCRIPTION
VSD - Low Inverter Baseplate
Temperature
LOW INVERTER BASEPLATE
TEMPERATURE FLT
A thermistor sensor is located inside the transistor module(s) on the OSCD power
unit. Any time this thermistor detects a temperature of 37°F (3°C) or lower a shut-
down will occur. The displayed message will change to LOW INVERTER PHASE
(A, B, or C) when more than one transistor module is used in the power assembly.
VSD - Phase A (or B, C) Gate
Driver
PHASE A (B, C) GATE DRIVER FLT
A second level of overcurrent current protection exists on the OSCD gate driver
board. The collector-to-emitter voltage of each transistor module is checked while
the device is turned on. This is called the collector-to-emitter saturation voltage. If
the voltage across the transistor module is greater than a set threshold, the transis-
tor module is turned off. This fault can also be caused if the transistor is not being
turned on when it should.
VSD - Precharge - DC Bus
Voltage Imbalance
PRECHARGE BUS V IMBALANCE
The definition for this fault is identical to “VSD - DC Bus Voltage Imbalance” except
that the fault has occurred during the precharge period, which begins during pre-
lube. Refer to “ VSD - DC Bus Voltage Imbalance” shutdown for more details.
VSD - Precharge - Low DC
Bus Voltage
PRECHARGE LOW VOLTAGE FAULT
This fault has two different timing events. First, the DC Bus voltage must be equal
to or greater than 50 VDC for 460 VAC input voltage, 41 VDC for 380, 400 and
415 VAC input voltage, or 60 VDC for 575 VAC input voltage, 4 seconds after
pre-charge has begun. Second, the DC Bus voltage must be equal to or greater
than 500 VDC for 460 VAC input voltage, 414 VDC for 380, 400 and 415 VAC input
voltage or 600 VDC for 575 VAC input voltage, 20 seconds after pre-charge has
begun.
VSD - Run Signal
RUN RELAY FAULT
Two run signals are generated by the Control Center, one via hardware and the
second via the communications link. Upon receipt of either of the two run signals
by the OSCD logic board, a 5-second timer will begin. If the missing run signal is
not received within the 5-second window the OSCD logic board will shut down and
the Control Center will display the shutdown message.
VSD - Serial Communications
SERIAL RECEIVE FAULT
This message is generated when communications between the micro board and
the ACC board, or the ACC board and OSCD logic board is disrupted for a least 22
seconds. If the optional Harmonic Filter is installed then the fault can be generated
when the communications between the OSCD logic board and the Harmonic Filter
logic board, or the Harmonic Filter logic board and the ACC board is disrupted.
VSD - Single Phase Input
Power
SINGLE PHASE POWER SUPPLY
This shutdown is generated by the SCR Trigger board and relayed to the OSCD
logic board to initiate a system shutdown. The single phase control uses circuitry to
detect the loss of any one of the three input phases. The trigger board will detect
the loss of a phase within one half line cycle of the phase loss. An LED on the SCR
Trigger board will indicate that the board is detecting the fault, and not a wiring
problem between the trigger board and the OSCD logic board. This message is
also displayed every time power to the OSCD is restored, or if the input power
dips to a very low level. Usually it indicates that someone has opened the circuit
breaker.
VSD - Stop Contacts Open
INVERTER INITIATED STOP FAULT
Whenever the OSCD initiates a fault, it first opens the fault relay on the OSCD
logic board. When the relay opens a message is sent to the ACC board, detailing
the cause of the fault. If this circuit ever opens without receiving an accompanying
cause for the fault over the communication link (within 11 communication tries, ap -
proximately 22 seconds) this message will be displayed. This fault may be replaced
with a Serial Communications fault if the serial link has failed.
TABLE 4 - CYCLING SHUTDOWN MESSAGE (CONT'D)