Labconco PURICARE Procedure Station Models 34812xx - Manual (Page 148)

Page 148 of 197
Motor Service Operations
NOTE: Use caution when measuring test voltages to avoid short circuits.
The ECM does not require routine service. The motor bearings are permanently
lubricated, and do not require additional lubrication.
Motor Testing
For the ECM to operate properly, the motor must receive:
1. Line voltage across pins 4 (black wire) and 5 (white wire) through the power
connector.
2. 24 Volts DC through pin 1 (brown wire circuit common) and 15 (yellow wire)
on the data Connector.
3. A pulse width modulation signal through pin 10 (purple wire) on the data
connector. This signal is measured with respect to circuit common, which is
pin 1 (brown wire).
Note: The above pin numbers and wire colors are described as they exist at the motor
connectors. These connectors are located inside the contaminated area, as so you may
want to measure these signals as they exit out of the electronics module on top of the
BSC, rather than decontaminating the BSC. The instructions below refer to accessing all
the necessary motor drive signals as they exit the electronics module.
Caution: In order to confirm proper motor operation, the unit must be
energized. Use caution when testing electrical components.
NOTE: To properly measure motor line and signal voltages, you should use
the pass-thru harness, Labconco Part # 3842601. The harness is part of
Labconco Certifier’s Kit, Part #3858400. Qualified certifiers can obtain this kit
by contacting Labconco Customer Service Department at 800-821-5525.
1. Unplug the Logic.
2. Access the electronics module as described earlier in “Electronics Module
Access”, and securing it so it does not fall and damage wire and components.
3. Locate the white-colored, 15 pin connector that connects to the pass-thru
harness as shown in Figure 9-9.
Figure 9-9
15 pin connector