F-code
Section
C-code
PS S5.12 5460 24 Volt, 400 Amp Transistor Controller Version no
T-code
001
HMX
The First Steps of Any Troubleshooting Procedure are to: 1. Inspect the truck for physical damage or mechanical malfunction. Contactors must be free to move and the tips must not be welded or burnt. 2. Check for ground faults from the electrical system to the frame with an ohmmeter. A minimum of 20,000 ohms resistance from the frame to any and all wiring is acceptable. 3. Check that the battery is fully charged and connected. 4. Operate the truck in all modes to determine the exact symptoms. DO NOT forget that these systems are equipped with safety circuits that prevent operation in the event of improper operating procedures.
2. Basics Of Circuit Operation The Curtis® PMC SepEx model 1244 is a microprocessor based, programmable motor controller designed for separately excited motors. It is a true MultiMode controller capable of four distinct operating modes, or personalities, and is programmable with a Curtis® 1307 Programmer. In addition to programming the controller, the 1307 has Diagnostic and Test modes to display error codes and display the status of the controller’s inputs and outputs. The 1244 controller includes an armature controller and a field controller. Both of which regulate the voltage and current applied to the motor according to a preprogrammed motor control algorithm. This motor control algorithm allows the user to select programmable speed and torque profiles that can be tailored to almost any material handling vehicle traction system. The polarity and magnitude of the field current is also controlled to provide solid state, contactorless direction control and regenerative braking. The 1244 is energized by applying power to the keyswitch input, pin number 1. At that time the controller is powered up and performs an internal self test. The controller becomes active by applying power to the interlock input, pin number 2. At that time, the following start-up checks are performed: 256
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Service Manual
1997-07-15
