Filter
Top Products
FORM 160.55-O1 (604)
103
YORK INTERNATIONAL
• Low Condenser Flow – The VSD sys tem re quires
8 feet of pressure drop across the heat ex chang er
to maintain adequate GPM. If the pres sure drop is
less than 8 feet, it will be nec es sary to correct the
ß ow prob lem or add a boost er pump as is applied
on ret ro Þ t chill ers.
“VSD – INVALID CURRENT SCALE
SELECTION”
Since the part number of the VSD Logic Board is the
same on all horsepower sizes, the position of Program
Jumpers tells the Logic Board the size of the VSD
em ployed. This allows the VSD to properly scale the
out put current. If the Jumper conÞ guration is invalid, a
shut down is performed and this message is generated.
Re fer to YORK VSD Service manual 160.00-M1.
“VSD – LOW PHASE A INVERTER HEATSINK
TEMPERATURE”
(Style D VSD)
A Heatsink temperature sensor indicating a tem per a ture
<37°F will cause the chiller to shut down and dis play
this message. In most cases, the problem will be an open
thermistor or broken wiring to the ther mistor. The nor-
mal thermistor resistance is 10K ohms at 77°F.
“VSD – LOW PHASE B INVERTER HEATSINK
TEMPERATURE”
(Style D VSD)
See “Low Phase A Inverter Heatsink Tem per a ture”
message above.
“VSD – LOW PHASE C INVERTER HEATSINK
TEMPERATURE”
(Style D VSD
See “Low Phase A Inverter Heatsink Tem per a ture”
message above.
“VSD – LOW CONVERTER HEATSINK
TEMPERATURE”
If VSD part number is 371-02767-XXX (60 Hz) or
371-03700-XXX (50 Hz), a heatsink temperature sen sor
in di cat ing a temperature of <37ºF will cause the chiller
to shutdown and display this message. In most cases,
the problem will be an open thermistor or broken wir-
ing to the thermistor. The normal thermistor re sis tance
is 10K ohms at 77ºF.
“VSD – LOW PHASE A INVERTER BASEPLATE
TEMPERATURE”
(VSD part number 371-03789-xxx (503HP 60Hz; 419HP
50Hz (Flash Memory Card version C.MLM.02.04.xxx
and later)
The chiller has shutdown because the baseplate tem-
perature has decreased to <37 ºF.
“VSD – LOW PHASE B INVERTER BASEPLATE
TEMPERATURE”
(VSD part number 371-03789-xxx (503HP 60Hz; 419HP
50Hz (Flash Memory Card version C.MLM.02.04.xxx
and later)
The chiller has shutdown because the baseplate tem-
perature has decreased to <37 ºF.
“VSD – LOW PHASE C INVERTER BASEPLATE
TEMPERATURE”
(VSD part number 371-03789-xxx (503HP 60Hz; 419HP
50Hz (Flash Memory Card version C.MLM.02.04.xxx
and later)
The chiller has shutdown because the baseplate tem-
perature has decreased to <37 ºF.
“VSD – LOW INVERTER BASEPLATE TEM-
PER A TURE”
(Applicable to VSD with part number 371-02767-
XXX (60 Hz) or 371-03700-XXX (50 Hz))
(Requires Flash Memory Card version C.MLM.-
02.02A.xxx and later)
A baseplate temperature sensor indicating a tem per a ture
of <37ºF will cause the chiller to shut down and display
this message. In most cases, the problem will be an open
thermistor or broken wiring to the thermistor. The nor-
mal ther mistor resistance is 5K ohms at 77ºF.
“VSD – PRECHARGE – LOW DC BUS
VOLTAGE”
During Pre-charge, the DC link must be equal to or
great er than 50VDC (41VDC for 50 Hz) within ½ sec ond
and 500VDC within 15 seconds after the Pre-charge re-
lay is en er gized. If this con di tion is not met, a shut down
is per formed and this mes sage is generated.
“VSD – LOGIC BOARD PROCESSOR”
This shutdown is generated if a communications prob-
lem occurs between the two microprocessors on the
VSD Logic Board.
“VSD – RUN SIGNAL”
Redundant RUN signals are generated by the OptiView
Control Center; one via TB6-24 and the second via the
Serial Communications link. Upon receipt of either of
the two RUN commands by the VSD, a 5 second timer
shall commence timing. If both run commands are not
re ceived by the VSD Logic Board within 5 seconds, a
shutdown is performed and this message is displayed.
2