DISPLAYED MESSAGE
MEANING
oc
Tripped on Overcurrent
SP
Tripped on Single-Phasing
ub
Tripped on Unbalance
uc
Tripped on Undercurrent
CF
Tripped on Contactor Failure
(Current Unbalance without Voltage Unbalance)
GrF
Tripped on Ground Fault
HI
Preventing the motor from starting due to High Voltage
Lo
Preventing the motor from starting due to Low Voltage
rP
Preventing the motor from starting due to Reverse Phasing
oFF
A stop command was issued from a remote source
TABLE NO.3: DISPLAY MESSAGES
MULTI-FUNCTION SYSTEM DISPLAY
The output display can show various system operating parameters:
•
L1-L2 Voltage
•
L2-L3 Voltage
•
L3-L1 Voltage
•
Average Voltage
•
Average Current
•
A
∅
Current
•
B
∅
Current
•
C
∅
Current
When the “MODE SELECT” switch is in the “RUN” position, the LED will display
one of the above operating parameters. To select or change the displayed pa-
rameter, turn the “DISPLAY / PROGRAM” adjustment to the desired position as
shown on the label.
The multi-function display also announces system faults such as low voltage,
high voltage, single phasing, unbalance, and reverse phasing errors. Any time
the “MODE SELECT” switch is in the “RUN” position, the “RESET / PROGRAM”
button may be pushed to view the last fault which occured. Table No. 3 shows
the possible messages.
RD2 = 10, should be appropriate.
RD3/#RU-Because an undercurrent would signal a serious problem in this
application (a broken shaft or belt), #RU should be set = 0 for a
manual reset. Therefore, RD3 does not have any function.
#RF- Because an overload (overcurrent) fault signals a serious
problem in this application (e.g., worn bearings), “oc” should
not
be included in the #RF setting so that a manual reset after an
overload fault is required. A #RF= 1 will give the system 1
chance to recover from an unbalance or single phasing problem
before manual reset is required.
UCTD- Setting UCTD = 5 will allow normal operation and not allow the
motor to run too long in an undercurrent failure mode.
GF- A ground fault setting of 15% of full load amps will be a
significant indicator that the motor should be evaluated for repair
or replacement. Therefore, GF = 27A x 0.15 = 4.0.
-11-
06/26/03
