SSD 605C Product Manual - Checksum Fail

7-4  

Trips and Fault Finding

605C Frequency Inverter

Checksum Fail

When the Inverter powers-up, non-volatile memory is checked to ensure that it has not been

corrupted. In the rare event of corruption being detected, the Inverter will not function. This

may occur when replacing the control board with an unprogrammed control board.

Inverter Indications

 The failure is indicated by the HEALTH and RUN LEDs showing SHORT FLASH, 

.

Referring to Chapter 4: “Operating the Inverter” - Reading the Status LEDs, you will note that

this also indicates Re-configuration mode, but this mode (and hence the indication) is not

available to the Inverter unless controlled by an MMI or Comms link.

Because you are controlling the Inverter locally (no MMI or Comms link etc.), the unit must be

returned to SSD Drives for reprogramming, refer to Chapter 8: “Routine Maintenance and

Repair” for address details. However, if you have access to an Operator Station or suitable PC

programming tool, the unit can be reset.

Operator Station Indications (when connected)

The MMI displays the message opposite.

Acknowledge the message by pressing the E key. This

action automatically loads and saves Macro 1 default

parameters and the ENGLISH 50Hz Product Code.

If your unit was using a different Product Code or macro,

you must reload the Product Code of your choice, reload

the macro of your choice, and perform a Parameter Save (SAVE/COMMAND menu) in that

order.

If data will not save correctly, the Operator Station will display a failure message. In this case,

the Inverter has developed a fault and must be returned to SSD Drives. Refer to Chapter 8:

“Routine Maintenance and Repair" for address details.

Fault Finding

Problem

Possible Cause

Remedy

Inverter will not power-up

Fuse blown

Check supply details, replace with

correct fuse.

Check Product Code against Model

No.

Faulty cabling

Check all connections are correct

and secure.

Check cable continuity

Inverter fuse keeps blowing

Faulty cabling or

connections wrong

Check for problem and rectify

before replacing with correct fuse

Faulty Inverter

Contact SSD Drives

Cannot obtain HEALTH state

Incorrect or no supply

available

Check supply details

Motor will not run at switch-on

Motor jammed

Stop the Inverter and clear the jam

Motor runs and stops

Motor becomes jammed

Stop the Inverter and clear the jam

Motor won’t rotate or runs in

reverse

Encoder fault

Check encoder connections

Open circuit speed

reference potentiometer

Check terminal

 Table 7-2  Fault Finding

DEFAULT

HEALTH

LOCAL

SEQ

REF

1

1

DEFAULTS LOADED

* CHECKSUM FAIL*