York YK - Page 5

FORM 160.52-M2
YORK INTERNATIONAL
5
FIG. 1
LD04375
29
34
TB3
RELAY BOARDRELAY BOARD
MICRO BOARD
OIL HEATER
ON /OFF
OIL PUMP VSD
START / STOP
REFRIGERANT LEVEL CLOSE
REFRIGERANT LEVEL OPEN
OIL PUMP VSD SPEED CONTROL
3R
1M
2
1 HTR
J10
1
2
3
J2-2
J2-1
J2-3
REFRIGERANT LEVEL
CONTROL BOARD
OIL PUMP VARIABLE SPEED DRIVE
PWM
RUN
+ V
3R-1
J4-2
J4-1
J3-2
J5-1
J1-2
+12 VDC
GND
POWER SUPPLY
BOARD
CLOSE
OPEN
TO VARIABLE
ORIFICE
3
3
J1
J1
70
1
TB1
DIGITAL INPUT BOARD
OIL PUMP DRIVE -
AUTOSTART LINE
DRIVE
OKAY
RELAY
OPEN ON FAULT