ABB UNITROL 1020 - Repair; Compatibility

Chapter 8 - Troubleshooting 
170 3BHS335648 E82 UNITROL 1020 User Manual
Possible causes
Checks, action
External controls faulty
No external control voltage
Measure control voltage
Check wiring
No internal control voltages Vdig, Vref
Measure internal control voltages
Configuration of the digital or analog inputs or outputs
is not correct
Check configuration
8.4 Repair
It is forbidden to open the plastic cover of the unit. A defective unit has to be sent in to
the return center for repair with a failure description and, if possible, trending of the
failure. Contact our return center prior to sending it to the manufacturer’s address. Note
that the manufacturer’s address may be different than the one specified by our return
process.
See manufacturer’s details on Chapter 1.5 Manufacturer’s Address.
8.5 Compatibility
Target Release
PC Tools / CMT1000
Panel Release
VDC
6.xxx
CMT1000 Release 6.xxx
OS 2.04, Control 1.001
No restrictions
Earlier versions of CMT1000 are no longer compatible with this AVR.