VYPER
™
VARIABLE SPEED DRIVE
MAINTENANCE
100-200 IOM (FEB 09)
Page 60
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 filter 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 verified on every power-up.
A known value is written to a specified 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.
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 commu-
nications were lost from the Vyper
™
to the Harmonic Filter. If
this bit is high for twenty consecutive seconds, this warning is
indicated. This warning is also indicated whenever a receive,
timeout, or checksum fault is detected on the Harmonic Filter
communications, for twenty continuous seconds.
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 communications 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.
