Yale MSW030-F Maintenance Manual page 6

Special Precautions
WARNING
To avoid controller damage, always disconnect
the battery, discharge the capacitor, and never put
power to the controller with any power wire dis-
connected. Never short any controller terminal or
motor terminal to battery. Make sure to use proper
procedure when servicing the controller.
2. Discharge capacitors. Carefully connect a 200-
ohm, 2-watt resistor between B+ and B
troller using insulated jumper wires and hold for 5
seconds. Remove the 200-ohm, 2-watt resistor be-
fore reconnecting the battery. See Figure 1 or Fig-
ure 2
Figure 1. Discharging Controller - MPB040-E
2
1. POSITIVE CONNECTION
2. NEGATIVE CONNECTION
3. INSULATED JUMPER WIRES
4. 200-OHM, 2-WATT RESISTOR
on con-
1. NEGATIVE CONNECTION
2. POSITIVE CONNECTION
3. 200-OHM, 2-WATT RESISTOR
4. INSULATED JUMPER WIRES
Figure 2. Discharging Controller - MSW020-E,
MSW025-E, MSW025-F, MSW030-F, MPW045-E, and
630 YRM 1003
Legend for Figure 1
MPW050-E