Rockwell Automation 150-E SMC Elevator Users Manual - Manual (Page 23)

Rockwell Automation Publication150-UM0009D-EN-P - February 2011 23
Chapter
4
Troubleshooting
Introduction The following topics are designed to assist in the troubleshooting and
maintenance of the SMC™ controller. The items mentioned in this section are not
intended to be all-inclusive and it is expected that these items should be used as
reference only.
For safety of maintenance personnel as well as others who might be exposed to
electrical hazards associated with maintenance activities, follow the local safety
related work practices (i.e., the NFPA 70E, Part II in the United States).
Maintenance personnel must be trained in the safety practices, procedures, and
requirements that pertain to their respective job assignments.
Diagnostics Indication The LED on the front of the product provides limited status information
regarding the condition of the controller. The conditions are as follows:
• LED Off — No control power or start command given.
• LED On — The device is active with starting, running, or stopping.
• LED Flashes — A fault has been experienced. Refer to table below for
additional explanation.
SHOCK HAZARD:
Hazardous voltage is present in the motor circuit even when the 150-E
controller is off. To avoid shock hazard, disconnect the main power
before working on the controller, motor, and control devices (such as
Start-Stop push buttons). Procedures that require parts of the
equipment to be energized during troubleshooting, testing, etc., must
be performed by properly qualified personnel, using appropriate local
safety work practices and precautionary measures.
ATTENTION: Disconnect the controller from the motor before
measuring insulation resistance (IR) of the motor windings.
Voltages used for insulation resistance testing can cause SCR
failure. Do not make any measurements on the controller with an IR
tester (megger).