Fault Indications From The Vsop Drive; Oil Pump Drive Status Led; Vsop Drive Okay Relay; Auto-Resettable Shutdowns - York YK Service Instructions Manual

FAULT INDICATIONS FROM THE VSOP DRIVE

OIL PUMP DRIVE STATUS LED

The VSOP drive has a drive status LED located in the
lower right corner on the control board near the mount-
ing screw. The panel door for the VSOP drive must be
opened to view the drive status LED. The state and
color of the LED can determine the status of the VSOP
drive. The condition of the LED is as follows:
• A constant GREEN LED will indicate that the
VSOP drive is in a running condition with no fault
conditions valid.
• A constant RED LED will indicate that the VSOP
drive is in a stopped condition, or torque limit during
a running condition.
• If the LED is not lit at all, the VSOP drive has failed
or the input power has been removed.
• A flashing RED LED will indicate that the VSOP
drive is in a faulted condition. The fault conditions
are explained below.
STATUS LED

VSOP DRIVE OKAY RELAY

The VSOP drive is equipped with a set of normally open
contacts. These contacts are open when the VSOP drive
is in a faulted condition. These contacts are driven
closed when the VSOP drive condition is okay. The
contacts are connected between TB1-70 and TB1-1.
When the contacts are open a voltage of 115VAC will
be measured at the TB1 connections and the chiller will
initiate a Cycling Shutdown. The following message will
appear on the display when the STATUS key is pressed
on the Microcomputer Control Center.
YORK INTERNATIONAL
DAY-TIME-OIL PUMP DRIVE - AUTOSTART
Refer to the fault conditions below to determine if the
Cycling Shutdown will auto reset. If the shutdown is of
the type that will auto reset, the drive okay relay will
close the contacts when the fault has cleared. If the
shutdown is not of the type that will auto reset, the drive
okay relay will not close the contacts unless the input
power to the VSOP drive is removed for 30 seconds
and reapplied.
AUTO RE-SETTABLE SHUTDOWNS
When the VSOP drive okay relay de-energizes one of
the following faults has occurred.
Heatsink Overtemperature
The temperature of the VSOP drive heatsink has ex-
ceeded 100ºC. The VSOP drive will restart automati-
cally when the heatsink temperature is less than 100ºC.
Possible Problems:
The drive is located in a location that is too hot. The
mechanical room may be too hot, or the location of
the VSOP drive may be too close to the discharge of
the compressor.
Possible Soultions:
Locate the VSOP drive in a cooler location. Move
the VSOP drive away for the discharge of the com-
pressor.
Undervoltage
• A 230 volt unit will fault if the input voltage falls
below 140VAC for a period of time greater than 40
seconds or instantly if the input voltage is less than
139VAC.
• A 460 volt unit will fault if the input voltage falls
below 280VAC for a period of time greater than 40
00132VIP
seconds or instantly if the input voltage is less than
279VAC.
• A 460 volt unit with a 575VAC line and a trans-
former will fault if the input voltage falls below
350VAC for a period of time greater than 40 sec-
onds or instantly if the input voltage is less than
349VAC.
The VSOP drive will restart automatically 10 seconds
after the fault has cleared.
Possible Problems:
There may be noise on the input line, or the line volt-
age may not be correct.
Possible Solutions:
Verify the input voltage.
FORM 160.52-M2
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