Operation Behind Step Controller; Failure Diagram - ABB LME620AI Service Instruction

10.5 Operation behind step controller

R5.1: provide controller
signal and check wiring

10.6 Failure Diagram

E6.2 sensor
failure
R6.1
check wiring
between
electronic
unit and ac-
tuator
pos. sensor
out of oper.
range;
see. chpt. 9;
replace sen-
sor
see chpt. 7
43/68-13 EN Electrical Linear Actuators for Continuous Modulating Control LME620AI / LME620AN (Contrac)
R 3.5: No
E4.2: pulses are measurable and po-
larity ok?
No
E6.1: LED signal: Failure
E 1.1: Yes
E6.4
E6.3:
sensor RAM
memory failure
failure
R6.2 R6.3
replace replace electronic unit
sensor
see chpt. 7
E5.1: actuator is set to MAN mode (user
interface; A 1 chpt. 10.9)
No
Yes
R5.2: Electronic unit
defective
E6.5: E6.6:
flash CPU
failure failure
Trouble Shooting
Yes
R5.3: Select „AUTO" mode
in user interface
(A 1 chpt. 10.9)
E6.7: E6.8:
fr. conv. pos. loop
failure monitor-
ing
R6.4
see 10.7
27