Thermo AC-4000, Operating And Service Manual

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REC 3838 4-12
4.3.8 Motor Speed Control Module Replacement
If you find it necessary to replace the motor speed control module, proceed as
follows:
1. Turn off power at mains.
2. Open distribution enclosure door (Figure 4-3).
3. Disconnect cable harness on motor speed control module from Distribution
Board connectors J-15 and J-16, or J-17 and J-18, or J-19 and J-20.
4. Remove motor speed control module mounting screws.
5. Remove motor speed control module from enclosure.
6. Remove wiring harness from old speed control module and connect it to the
new module. Set all controls (ACCEL, DECEL, MAX. SPEED, MIN. SPEED,
TORQUE, and IR COMP) on new module to match old module. (See Minarik
MM23000 User's Guide, Chassis Control Connections in the Appendix.) Set
115/230V switches to appropriate settings.
WIRE COLOR BOARD CONNECTION (EXTRON OR MINARIK)
Brown
Yellow
Violet
Red A1
L1
L2
A2
WIRE
COLOR
BOARD CONNECTION
EXTRON MINARIK
Orange
Gray
Blue 4
2
3 S1
S2
S3
7. Place new motor speed control module in enclosure.
8. Secure new speed control module using screws removed in step 4.
9. Connect cable harness as removed in step 3.
10. Close distribution enclosure door.
11. Apply power to electronics and verify proper operation.
4.3.9 Cold Start Procedure
This procedure clears the AC-4000 memory. It is recommended that this
procedure be done each time a printed circuit board is changed or memory is
scrambled. Thermo also recommends all product and setup information be
recorded prior to cold start. Proceed as follows:
1. Turn power switch OFF.
2. Turn power switch ON while holding down the CLR key.