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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 

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