FORM 160.55-O1 (920)
109
YORK INTERNATIONAL
“
VSD SHUTDOWN – REQUESTING FAULT
DATA
”
The VSD has shut down the chiller and the control
center has not yet received the cause of the fault from
the VSD, via the serial communications link. The VSD
shuts down the chiller by opening the Motor Control-
ler “VSD Stop Contacts” (located on the VSD Logic
Board and connected between TB6-16 and TB6-53 in
the Control Center). The Microboard in the Control
Center then sends a request for the cause of the fault to
the VSD Logic Board via the Adaptive Capacity Control
Board, over the serial link. Since serial communications
are initiated every 2 seconds, this message is typically
displayed for a few seconds and then replaced with one
of the following fault messages.
“
VSD – 105% MOTOR CURRENT OVERLOAD
”
This shutdown is generated by the VSD Logic Board
and it indicates that a motor overload has occurred. The
shutdown is generated when the VSD Logic Board has
detected that at least 1 of the 3 output phase currents has
exceeded 105% of the chiller Full Load Amps (FLA)
value for > 7 seconds. The chiller FLA value is set
by adjustment of the FLA potentiometer on the VSD
Logic Board. The chiller can be started after the RESET
push-button on the VSD Logic Board is pressed and
the COMPRESSOR switch is placed in the Stop-reset
position (O).
“
VSD – HIGH PHASE A INVERTER HEATSINK
TEMPERATURE
”
(Style D VSD)
This shutdown will occur if the heatsink temperature
exceeds 158°F on any of the output pole assemblies.
This shutdown will seldom occur. In most cases where
the coolant temperature has risen abnormally, the VSD
will shut down on “Ambient Temperature” @ 140.0 °F
before the heatsinks can reach 158°F. If this message
is displayed, make sure there is adequate coolant level,
ascertain the pump is operating when the chiller is run-
ning and check the strainer in the primary of the heat
exchanger for clogs and silt. The chiller can be started
after the fault condition clears, the RESET button on the
VSD Logic Board is pressed and the COMPRESSOR
switch is placed in the Stop-reset position (O).
“
VSD – HIGH PHASE B INVERTER
HEATSINK TEMPERATURE
”
(Style D VSD)
See Phase A message above.
2
“
VSD – HIGH PHASE C INVERTER
HEATSINK TEMPERATURE
”
(Style D VSD)
See Phase A message above.
“
VSD – HIGH CONVERTER HEATSINK TEM-
PERATURE
”
(Style D VSD)
See Phase A message above.
“VSD – HIGH CONVERTER HEATSINK TEM-
PERATURE”
(Applicable to VSD with part number 371-02767-
XXX (60 Hz) and 371-03700-XXX (50 Hz))
(Requires Flash Memory Card version C.MLM.-
02.02A.xxx and later)
This shutdown will occur if the heatsink temperature
exceeds 170ºF. The chiller can be started after the fault
condition clears and the COMPRESSOR Switch is
placed in the Stop-reset (O) position.
“VSD - HIGH INVERTER BASEPLATE TEM-
PERATURE”
(Applicable to VSD with part number 371-02767-
XXX (60 Hz) and 371-03700-XXX (50 Hz))
(Requires Flash Memory Card version C.MLM.-
02.02A.xxx and later)
This shutdown will occur if the baseplate temperature
exceeds 175ºF. The chiller can be started after the fault
condition clears, the RESET button on the VSD Logic
Board is pressed and the COMPRESSOR Switch is
placed in the Stop-reset position (O).
“VSD – HIGH PHASE A INVERTER BASE-
PLATE TEMPERTURE”
(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 tempera-
ture has increased to >158 ºF. The chiller can be stated
after the fault condition clears, the RESET button on the
VSD Logic Board is pressed and the COMPRESSOR
switch is placed in the Stop-reset (O) position.
“VSD – HIGH PHASE B INVERTER BASE-
PLATE 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 tempera-
ture has increased to >158 ºF. The chiller can be stated
after the fault condition clears, the RESET button on the
