Fault diagnosis of LTi CDE/CDB3000

6 flashes: E-OLI, device safety shutdown, device overload, check for selection or use of larger devices.

7 flashes: E-OTM, motor temperature too high, check PTC connection and parameter settings, allow motor cooling.

8 flashes: E-OTI, overheating of positioning controller, improving ventilation inside the cabinet, checking load and braking resistance.

KEYPAD operation errors include ATT1 to ATT7 and ERROR, which respectively indicate that the parameters cannot be changed, the motor cannot be controlled through the CTRL menu, error status, parameter values are not allowed, too high, too low, the card is unreadable, and the password is incorrect. SMARTCARD errors include ERR91 to ERR99, indicating write protection, checksum error, model mismatch, parameter incompatibility, disconnected connection, invalid data, insufficient memory, region not present, etc.

Reset is divided into parameter reset and device reset. Parameter reset restores the current parameter to the last saved value; Reset the device to restore factory settings. KEYPAD can reset parameters by pressing two cursor keys simultaneously; Pressing both cursor keys simultaneously when powering on can restore the factory settings. In DRIVE MANAGER, "Active device>Reset to factory setting" can also restore factory settings. Note that the factory settings will clear the preset solution, and the terminal allocation needs to be rechecked.

Practical troubleshooting of common faults

Problem 1: No response after power on, all LEDs turn off. Possible reason: Frequent switching of the main power supply has caused the equipment to enter high resistance isolation protection. Solution: Wait for a few minutes and then power on again. If there is still no response, check the main fuse, circuit breaker, power supply voltage, and line reactor.

Question 2: The red LED flashes 3 times and displays E-OC. Check whether the motor cable is short circuited or grounded, whether the motor coil is damaged, and whether the neutral wire and grounding are normal. Check the control loop parameters, slope settings, and motor data. If the motor cable is too long, an output reactor needs to be installed.

Question 3: The red LED flashes 4 times and displays E-OV. Check if the main power supply voltage is too high. If it occurs during braking, it indicates excessive regenerative energy, and the braking ramp should be extended or a braking resistor should be installed. If using internal braking resistors, ensure that temperature monitoring is normal; If an external braking resistor is used, the Klixon temperature switch must be used to cut off the main power supply in case of overheating.

Question 4: Motor temperature alarm E-OTM. Check if the motor PTC is correctly connected to X3 or X6, and if the MOPTC parameter matches the PTC type. If the motor is indeed overheating, check the load, cooling, and selection. Allow the motor to cool down before resetting.

Problem 5: Encoder direction error or abnormal speed feedback. Check if the encoder cable matches the encoder type, if the shielding layer is grounded at both ends, and if A, B, R or CLK, DATA are twisted in pairs. Rotate the motor shaft manually and observe the speed symbol. If the direction is opposite, A, B can be exchanged or parameters can be adjusted. If using a second encoder, note that X7 is used for position control and X2 is used for commutation and auxiliary speed control.

Problem 6: STO cannot be reset. Check the timing of ENPO and ISD00/ISDSH. When canceling STO, ISDSH or ISD00 should be set to high level before ENPO or simultaneously with ENPO. If the order is incorrect, restart suppression cannot be lifted. Check if the status of feedback relay RSH or OSD02 is consistent with both channels. If there is inconsistency, it indicates that there is an error in the system and it must be shut down for inspection.

Question 7: DRIVE MANAGER cannot connect. Check if the RS232 cable CCD-SUB90X is connected to X4, with a length not exceeding 3 meters. It is recommended to use an optical isolator to prevent transient current from damaging the controller or PC. Check the COM port and DRIVE MANAGER version V3.4 or above.

Problem 8: When switching motor cables, the contactor burns or overcurrent shuts off. The motor cable must be switched in a no current state. When using the ENMO function, parameter 247-TENMO sets a delay to ensure that the contactor closes first before enabling the power level, and closes the power level before disconnecting the contactor when stopping.

Maintenance and spare parts recommendations

CDE/CDB3000 is designed for fixed installation, with a protection level of IP20, terminal IP00, and wall heat sink IP54. Environmental temperature: 5 ° C to 40 ° C during operation (relative humidity 5% to 85% non condensing), storage -25 ° C to+55 ° C. The installation height should not exceed 1000 meters, and if exceeded, the capacity should be reduced to a maximum of 2000 meters. The equipment does not support the use of non fixed devices.

Spare parts include main fuse, line reactor, main filter, braking resistor, radiator KEYPAD KP300、SMARTCARD、 Encoder cables, motor cables, STO relays, etc. Before replacing the module, the power must be turned off and wait for the DC bus voltage to drop below 60 V. After replacement, it is necessary to check the parameters, terminal allocation, and STO function. If using SMARTCARD, pay attention to ERR91 to ERR99 errors to avoid write protection, model mismatch, or invalid data.