Failure Detection; Led Signals At Local Control Panel; Trouble Shooting - ABB LME620AI Service Instruction

9

Failure detection

9.1

LED signals at local control panel

Provided the electronic unit is supplied with voltage (green LED on LCP „ON"), the red LED on the local
control panel provide some basic status information:
both LED are „OFF"
both LED are „ON"
both LED flash simultaneously actuator end positions are not set; actuator does not accept com-
both LED flash alternatively
Fig. 27: Local Control Panel
10

Trouble Shooting

NOTICE Check wiring, polarity and all plug and terminal connections before you start detailed trouble shooting.
The following chapter specifies various possible failure events or conditions, which should be checked.
Follow the block diagrams to find the associated reason, result or measure to solve the malfunction.
Example:
condition:
possible failure:
one reason / measure to solve the malfct.
22 Electrical Linear Actuators for Continuous Modulating Control LME620AI / LME620AN (Contrac)
actuator is ok
actuator is in bootstrap mode (e. g. during data loading procedure); in
this case the actuator is not available for the positioning loop
mands to the digital inputs and can only be moved via drive buttons on
the local control panel (see also electronic unit instruction)
actuator failure (e. g. out of adjusted range); actuator can not be moved
via command buttons or commands from the process control system;
reset is only possible once the failure reason is eliminated
E6.1 LED signal: Failure
E6.3 sensor memory failure
R6.2 replace sensor; see chpt. 7
(in this case the user will find more detailed in-
formation about the sensor replacement in
chapter 7)
Failure detection
(68d_0110)
43/68-13 EN