Johnson Controls Frick vyper VYA PG -46, Руководство по обслуживанию

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VYPER ™ VARIABLE SPEED DRIVE
MAINTENANCE
S100-200 IOM (MAY 08)
Page 57
The DC link voltage magnitude should remain within -80 VDC
of the bus voltage setpoint determined from the peak input
voltage. If the DC link voltage magnitude falls outside this
range for 100 msec the unit will trip and the Quantum
™
LX
panel will display the message Fault 71. The harmonic fi lter
dynamically generates its own fi lter DC link voltage by the
interaction of the fi lter choke and switching its IGBT’s. This
DC level is actually higher than the level one could obtain
by simply rectifying the input line voltage. Thus the harmonic
fi lter actually performs a voltage “boost” function. This is nec-
essary in order to permit current to fl ow into the AC line from
the fi lter when the AC line is at its peak level. This particular
shutdown and its accompanying message is generated if the
fi lter’s DC link voltage drops to a level less than 80 VDC below
the fi lter DC link voltage setpoint. The fi lter DC link voltage
setpoint is determined by the fi lter logic board via the sensing
of the three phase input line-to-line voltage. This setpoint is
set to the peak of the sensed input line-to-line voltage plus
59 volts, not to exceed 760 volts and varies with the input
line-to-line voltage. If this shutdown occurs occasionally, the
likely cause is a severe sag in the input line voltage. A power
monitor should be installed to determine if a power problem
exists. Also, verify the operation of the AC line voltage isolator
board, by comparing the phase to phase voltage on J5 pins
1-3. The three voltage measurements should be almost the
same voltage, approximately 5.2 VAC.
Fault 75: Harmonic Filter DC Bus Voltage Imbalance
Message
Quantum: “Fault 75”
Quantum LX: “ Harmonic Filter DC Bus Voltage Imbalance”
The 1/2 DC link voltage magnitude will remain within
± 50VDC of the total DC link voltage divided by two during
the precharge interval for both 60 and 50 Hz 519 fi lters. If not,
the Quantum
™ LX panel will display the message Fault 75.
The 1/2 DC link voltage magnitude will remain within ± 50
VDC of the total DC link voltage divided by two for both 60
and 50 Hz 519 fi lters. If the 1/2 DC link magnitude exceeds
this ± 50 volt window, the unit will trip and the Quantum
™ LX
panel will display the message Fault 75.
The Filter DC link is fi ltered by large, electrolytic capacitors
which are rated for 450 VDC. These capacitors are wired
in series to achieve a 900 VDC capability for the DC link.
It is important that the voltage be shared equally from the
junction of the center or series capacitor connection, to the
negative bus and to the positive bus. This center point should
be approximately ½ of the total DC link voltage. Verify the
problem truly exists using a pair of digital meters, measuring
from the series capacitor connection point (wire 525A) to
the positive bus (wire 526A), and from the series capacitor
connection point to the negative bus (wire 524A). When the
fi lter precharge relay engages, both voltage readings should
come up together, and have a value that is within ± 50 VSD
of each other. If you fi nd the voltages are equal, you likely
have a problem with the fi lter bus isolator board, the fi lter
logic board, or the wiring/connectors between them. Check
the voltages at the input to the fi lter logic board, J5 pin 4 to
J5 pin 5 and J5 pin 5 to J5 pin 6. The voltages should be
approximately equal. If they are not, the likely cause is a bad
isolator board or a loose connection. If they are balanced, the
fi lter logic board should be replaced. If the voltages are not
equal, check the wiring between the bleeder resistors 12RES
and 13RES and the fi lter power unit. Also check the value of
these resistors. They should be 3000 ohms nominally. If no
problem can be found by performing these steps, replace
the fi lter power unit.
Fault 76: Harmonic Filter 110% Input Current Overload
Message
Quantum: “Fault 76”
Quantum LX: “ Harmonic Filter 110% Input Current Overload”
The overload threshold and timer functions reside in software
on the Harmonic Filter’s Logic board. The unit’s three phases
of RMS output current are compared to the overload thresh-
old magnitude. If this threshold is exceeded for 40 seconds
the unit will trip and the Quantum
™
LX panel will display the
message Fault 76. The nominal RMS current trip levels are
set at 110% of the maximum expected RMS input current
when running at 100% FLA and are as follows: 305 Hp (60
Hz) / 292 Hp (50 Hz) = 128 Amps.
Fault 77: Harmonic Filter Run Signal
Message
Quantum: “Fault 77”
Quantum LX: “ Harmonic Filter Run Signal Fault”
When a digital run command is received at the fi lter logic
board from the Vyper
™ Logic board via the 16 position rib-
bon cable, a 1/10 second timer is begun. A redundant run
command must also occur on the serial data link from the
Vyper
™ Logic board via the ribbon cable before the timer
expires. If not, the Vyper ™ will be shut down and this Fault
message will be displayed. If this shutdown occurs, check
the integrity of the 16-wire ribbon cable installed between the
Vyper
™ Logic board and the Filter Logic board. If the prob-
lem persists, replace the Vyper ™ Logic board. If the problem
remains, replace the Filter logic board.
Fault 81: Interface Board NovRAM Failure
(Warning Only)
Message
Quantum: “Fault 81”
Quantum LX: “VSD Interface Board NovRAM Failure (Warn-
ing Only)”
The integrity of the NovRAM is verifi ed on every power-up.
A known value is written to a specifi ed location in NovRAM,
read back from that location, and compared to the value
originally written. If the two values do not match, the NovRAM
Failure fault is set.
Fault 82: Interface Board Motor Current Limit Override
(Warning Only)
Message
Quantum: “Fault 82”
Quantum LX: Interface Board Motor Current Limit Override
(Warning Only)
This warning is indicated whenever the Frick Interface Board
is operating under Current Limit Override. If the Run Com-
mand signal is disengaged, any current limit in effect will be
cancelled. If the Run Command signal is engaged, the actual
speed command is set to the initial speed command, and the
Motor Current is monitored every two seconds. If the Motor
Current rises above 103%, the unit enters current limit and a
warning condition will be set. Thereafter, as long as the Motor
Current stays above 100%, the actual speed command will
be reduced by 6 RPM every two seconds. Once the Motor
Current falls below 100%, the actual speed command is in-
creased by 6 RPM every two seconds, until the actual speed
command falls within ± 6 RPM of the initial speed command,
when it is set to the initial speed command once again and
the warning is cleared. The actual speed command is used
to set the Quantum
™
LX Vyper
™
operating speed.