KEB Combivert R6 Instruction Manual - page 37
US - 37
Troubleshooting and Diagnostics
Fault
Cause
Solution
Error DC Bus
charge fault
(E.LSF)
If the error does not reset itself after
power up and the fault remains, then the
following causes may be applicable:
Load-shunt defective
Input voltage wrong or too low
High losses in the supply cable
Unit must be serviced.
Verify line supply or transformer output supply and that
there is not excessive sag or brown-out conditions.
Error power
unit (E.PU)
Error on the power stage.
General error on the power stage. Check grounding
of the transformer. If the error is always activer, then
the unit must be sent in for evaluation. If intermittent,
it may indicate excessive line sag conditions.
Error un-
dervoltage
(E.UP)
DC bus level is too low
Likely indicates poor power quality.
Verify line input voltage. Sagging voltage or loss of
phase could cause E.UP error.
Check all grounding including X0 of transformer.
Error Overpo-
tential (E.OP)
faults on
F5 Elevator
Drive
Regen unit unable to regen back to the
line; CP.1 status not in 'regen' status dur-
ing generating operation:
Enable input not present (CP.1 Status
= nop)
Input logic not set correctly to recog-
nize enable input (i.e. di.00 = PNP vs.
NPN)
Regen unit in active fault;
DC bus fuse(s) open.
Verify enable input at X2A.12. When active under
normal operation, the CP.1 status should be either
'Stby' or 'rEgEn'.
Verify di.00 setting according to input type.
PNP: inputs must be +24VDC to be active.
NPN: inputs must be at 0VDC to be active.
CP.1 status displays fault message or if the fault
message has been cleared from the screen by
pressing ENTER on the operator keypad, a fl ashing
red indicator LED on the keypad and R6 indicates an
active fault remains. Reset (2AX.13) or resolve the
cause of the fault.
If the fault has been automatically reset, the last fault
can be viewed in the fault log, CP.21. If it is unclear
whether a fault actually occurred, refer to the note
under CP.21...28 to force a specifi c fault in order to
determine if a new fault is occurring.
The DC bus fuse(s), internal to the R6, can be
checked visibly whether they are open and replaced
as needed. Before checking, ensure all safety
measures necessary including powering down the
unit from the mains disconnect and locking it out and
allowing the DC bus to fully dissipate and verifying
0VDC across the DC bus terminals ++, - -.