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VYPER
™
VARIABLE SPEED DRIVE
MAINTENANCE
100-210 IOM (
JUL
09)
Page 68
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 triggered 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 increased by 6 RPM every two seconds, until
the actual speed command falls within ± 6 RPM of the initial
speed command, when speed returns to the initial speed
command, the warning is cleared. The actual speed com-
mand is used to set the Quantum
™
LX Vyper
™
operating
speed.
Fault 83: Harmonic Filter Serial Communication
(Warning Only)
Message
Quantum: “Fault 83”
Quantum LX: “Harmonic Filter Serial Communication (Warn-
ing Only)”
When requesting Status data, the response data from the
Harmonic Filter includes a bit that indicates whether com-
munications were lost from the Vyper
™
to the Harmonic Filter.
If this bit is high for twenty consecutive seconds, this warning
is triggered. This warning is also triggered whenever a twenty-
second receive, timeout, or checksum fault is detected on
the Harmonic Filter communications.
This message can also occur as a background message
when the chiller is running. When this message is displayed,
all filter related values are unavailable. If communication is
reestablished, the message will disappear and normal values
will again be displayed. If this problem is encountered, the
ribbon cable connecting the Vyper
™
Logic board to the Filter
logic board should be checked.
Fault 84: Harmonic Filter Input Frequency Out of Range
(Warning Only)
Message
Quantum: “Fault 84”
Quantum LX: “Harmonic Input Frequency Out of Range
(Warning Only)”
The power line frequency detected by the Vyper harmonic
filter is outside the range of 58 to 62 Hz (60 Hz), or 49 to
51 Hz (50 Hz) and the Quantum
™
LX panel displays Fault 84.
This message automatically clears when the line frequency
is within range.