19
Trouble Shooting
9
Symptom
No Display
Display stays at “000”
with motor running
Max. Limit alarm trips
immediately when pump
is turned on
Nuisance alarms during
normal operation
Alarm trips but motor does
not stop
Min. Limit alarm trips when
motor is switched off
Display shows “100” during
normal operation
Display decreases when load
increases or vise versa
Suggestion
HPL110A is not getting power, check mains electrical
connection
HPL110A is not receiving a current signal, check that
full L3 current is flowing into Terminal 7 and back out
of Terminal 8 or from Secondary Terminals—S1 and
S2—of current transformer, if used.
First check that Max. Limit setting is correct, then check
that the Ts Start Timer setting is sufficiently long. Either
increase L1 Max. Limit or TS Start Timer as appropriate.
First check that alarm values are correct.
If nuisance alarms persist, increase the Tr Reaction Timer
associated with the nuisance alarm.
Check integration of the HPL110A alarm relay with the
motor starter.
Verify that the HPL110A relay is switching correctly.
This is normal when using a Min. Limit alarm function.
To correct, either implement the S2 alarm inhibit as
described in Section 5.1 Power-Down Alarm Blocking
or activate the Min. Alarm Block function described in
section 8.8.
HPL110A current range is saturating, check settings for
Current Range against the motor ratings and correct
as necessary.
HPL110A voltage rating is too low, check and install
correct HPL110A model.
Motor is undersized.
Check electrical connection and ensure that the
L3 leg of the mains supply is connected to L3 -
terminal 5 - and also used for the K-L current taps -
terminals 7 and 8.
