York R123 - Manual (Page 104)

YORK INTERNATIONAL
104
FORM 160.55-O1 (604)
This is generally indicative of a wiring problem be tween
the OptiView Control Center and the VSD.
“VSD – SERIAL COMMUNICATIONS”
This message is generated when communications be-
tween the Adaptive Capacity Control (ACC) Board
and the VSD Logic Board or between the OptiView
Con trol Center Microboard and the VSD Logic Board,
is disrupted. This is generally indicative of defective
wir ing between J11 on the VSD Logic Board and J8 on
the ACC Board.
“HARMONIC FILTER – LOGIC BOARD OR
COMMUNICATIONS”
This message is generated when communications be-
tween the Harmonic Þ lter and the VSD Logic Board, is
disrupted. If equipped with Flash Memory Card version
C.MLM.02.03.xxx and later, the communications must
be interrupted for 10 con tin u ous communications cy cles
(20 seconds) before the shutdown will occur.
“HARMONIC FILTER – HIGH DC BUS
VOLTAGE”
The Harmonic Þ lter’s DC Link voltage is continuously
monitored and if the level exceeds 860VDC, this shut-
down is performed. The Harmonic Filter has its own
DC bus as part of the Filter power assembly and this
DC Link is not connected in any way with the VSD’s
DC link. If this shutdown occurs, it will be necessary
to look at the level of 460VAC applied to the Har mon ic
Filter. The speciÞ ed voltage range is 414 to 508. If the
incoming voltage is in excess of 508, steps should be
taken to reduce the level to within speciÞ ed limits. The
cause of this message is typically high line voltage or a
surge on the utility supply.
“HARMONIC FILTER – HIGH PHASE A
CURRENT”
The maximum instantaneous harmonic Þ lter current is
monitored and compared to a preset limit. If this limit
is exceeded, a shutdown is performed and this message
is generated. The Filter current is monitored using two
DCCT’s and these signals are processed by the Þ lter
logic board. The preset limits are as follows:
351/292 HP = 356 Amps
503/419 HP = 496 Amps
790/658 HP = 745 Amps
If the VSD automatically restarts after this shutdown and
continues to operate properly with the Þ lter op er at ing,
it is likely the Þ lter tripped due to a sag or surge in the
voltage feeding the VSD. If this message re oc curs, pre-
venting the chiller from starting, the VSD will re quire
service.
“HARMONIC FILTER – HIGH PHASE B
CURRENT”
See “Harmonic Filter – High Phase A Current” mes-
sage above.
“HARMONIC FILTER – HIGH PHASE C
CURRENT”
See “Harmonic Filter – High Phase A Current” mes-
sage.
“HARMONIC FILTER – PHASE LOCKED
LOOP”
This shutdown indicates that a circuit called “Phase
Locked Loop” on the Þ lter logic board has lost syn chro -
ni za tion with the incoming power line. This is usu al ly
indicative of an open fuse in one of the Þ lter’s in com ing
power line. Filter power fuses 11FU, 12FU and 13FU
should be checked.
“HARMONIC FILTER – PRECHARGE –
LOW DC BUS VOLTAGE”
During pre-charge, the Þ lter’s DC link must be equal
to or greater than 50VDC (41VDC for 50 Hz) within
1/10 second after the pre-charge relay is energized. If
this condition is not met, a shutdown is performed and
this message is generated.
“HARMONIC FILTER – LOW DC BUS
VOLTAGE”
The Harmonic Filter generates its own Þ lter DC link
voltage by switching its IGBT’s. This DC level is ac-
tu al ly higher than the level that one could obtain by sim-
ply rectifying the input line voltage. Thus, the har mon ic
Þ l ter actually performs a voltage “boost” function. This
is necessary in order to permit current to ß ow into the
power line from the Þ lter when the input line is at its
peak level. This shutdown occurs when the Þ lter’s DC
link voltage decreases to a level less than 60VDC be-
low the Þ lter DC link voltage setpoint. This Setpoint is
determined by the Þ 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 volt age
plus 32 volts, not to exceed 760 volts and it varies with
the input line-to-line voltage. If this shutdown oc curs
occasionally, the likely cause is a severe sag in the input
line voltage.
“HARMONIC FILTER – DC BUS VOLTAGE IM-
BAL ANCE”
The Þ lter DC link is Þ ltered by large, electrolytic ca-
pac i tors, rated for 450VDC. These capacitors are wired
OptiView Control Center