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YORK INTERNATIONAL
72
RECIP. MICRO PANEL
MOTOR CURRENT BOARD 031-00817
LINE LEVELS
Two line levels of motor Current Boards (MCB’s) are now present in Recip. Micro Panels. These line levels are line
-000 and line -002. Line -000 is used in panels which utilize 200:0.2, 300:0.2, and 400:0.2 C.T.’s (Current Transform-
ers). Line -002 is used only with 500:0.2 C.T.s.
Line -000 and line -002 are not interchangeable. The chiller usually will not run if the incorrect board is installed in the
panel. This is because the MCB resistor plugged into J2 will not be the correct value.
When replacing an MCB, be sure to not only look at the line level, but also check the value of the R1 resistor next to
the J2 connector where the MCB resistor is plugged in (See Fig. below). This will positively determine the line level
of MCB you need.
The line level will be stamped behind the part number 031-00817B (i.e. 031-0081702. The “B” should be ignored
and may not be present). No line number indicates a -000 and 02 indicates a -002. This is a deviation from normal
YORK standards. The small size of the board does not allow the full three digit number to be stamped behind the
part number.
Be sure the original MCB resistor plugged into J2 is placed into the new board. The resistor is sized to the compres-
sor FLA and panel C.T. ratio during manufacturing. Compressor damage or faulting could occur if the MCB resistor
is missing or incorrect.
These measures should insure that additional problems are not introduced into the panel if a Motor Current Board is
replaced.
LD01899
Line -000: 100
Ω
(Brown, Black, Brown)
Line -002: 10K
Ω
(Brown, Black, Orange)