3
Check full load current with
amprobe and compare it with
the nameplate rating. (Clamp
amprobe around one phase.)
With pump running, check
discharge to verify the pump
is running.
Check voltage with voltmeter
and amperage with amprobe
at overload.
Make sure H-O-A switch is left
in the Auto position after start-up
is completed.
Check the pump manuals.
Panel
Maintenance
Maintenance:
Periodicity of the maintenance
schedule will vary with operating
and environmental conditions. It
will also vary with the specific
type of control supplied. This list
is a guide only.
Exercise breaker through one
cycle. Be careful not to over
exercise as the breaker is not
a switching device. Excessive
operations tend to affect the trip
curve of the breaker.
Check contactors and relays for
excessive humming. This can be
accomplished by turning pumps
on and off in the Hand and Off
modes with H-O-A switch.
Check bulbs in all fixtures.
Check continuity through the
control fuses.
Check voltage at primary and
secondary of control transformer.
Check the pump full load amps.
If applicable, check the single-
phase start relay by using an
amprobe around the red wire
(start winding). Amprobe should
display a very brisk action from
zero to locked rotor and back to
operating load. This action occurs
on pump start and the action
must show no lazy movement.
For further details, consult
the factory.
Check junction boxes for
moisture. Moisture may
cause chattering of the relays
and contactors.
If enclosure has a door gasket,
check door gasket for integrity.
This can be a visual inspection.
Check labels to verify they have
not been damaged.
Lubricate enclosure hinges.
Pull floats and check for proper
operation and ensure there is no
foreign buildup on them.
Panel Spare
Parts List
The following is a list of
recommended spare parts;
however, conditions of service
vary significantly and a general
list may not in its entirety be
applicable to a given installation.
1. Fuses for control
transformer(s) primary
and secondary.
2. Intrinsically safe relay.
3. Contactor.
4. Bulbs for alarm lights.
Conditions That Void
UL Listing:
The intrinsically safe control
panel as manufactured per the
Hydromatic
®
standard is a UL
Listed device. In order to protect
the UL Listing, it is imperative
that no component, layout,
wiring or barrier changes be
made without prior consent of
the factory.
Panel
Troubleshooting
1. Pump does not run in
Hand position.
a. Check pump circuit breaker,
control circuit breaker and
control fuses for tripped or
blown condition.
b. Check overload relay to see
if it is tripped. Reset relay
if tripped.
c. If supplied, check heat
sensor reset to verify
thermal overload of motor
has not tripped.
d. Check wiring of pump to
control panel. It should
agree with the schematic.
2. Pump does not run in
Auto position.
a. Check items a. through d.
per Item #1 above.
b. Floats may not be hanging
free or may have a buildup.
Pump the level down with
the selector switch on Hand,
so floats can be observed.
c. Floats may be miswired
to control panel. Check
float wiring and hookup by
referring to the schematic.
If the start and stop floats
are hooked in reverse, pump
will short cycle and will not
pump the level down.
d. The floats or the alternator
could be defective. Check
the floats with a continuity
check and operate panel
through a few cycles to
check alternator operation.
e. Is water level sufficiently
high in wet well to activate
appropriate floats?
f. Check electrical operation
of each float. Disconnect
the main power, then
disconnect each float
