Hydromatic Novus 1000 Series, Installation And Service Manual

4. Start relay check.

a. Check the coil re sis tance.

It should be 3,000 to 
15,000 ohms.

b. Install a clamp on amp

meter around the start
wind ing  lead.

c. Set the amp meter 

scale to at least 2 times 
the pump motor full 
load current.

d. Place the H-O-A switch

in the Hand position to
start the pump.

e. The meter should read

approximately 2 times
full load current during
starting.

f. After the motor has

started (within one
second) the current
should drop to a value
much less than full load
current.

5. Motor voltage check:

6

Pump
Troubleshooting

7. If the unbalance moves

with the motor leads, the
un 

bal 

ance is caused by

the mo 

tor. If the

unbalance remains with
the terminals, the
unbalance is in the 
pow er  supply.

8. If the current unbalance

exceeds five percent, 
nui 

sance tripping or 

ex ces sive  heating  will 
result.

9. Connect leads for the 

lowest percent of current 
un bal ance.

f. Connections and start

components. Single phase
only.

1.

Disconnect all power

    from  the  panel  before
    making these checks.

2. Motor winding re 

sis 

tance 

    read ings.

    a. Disconnect 

all 

three

motor  leads  from  panel

terminal blocks.

    b. Using  a  volt-ohmmeter,
 

 with the scale set  

on  RX1,  measure  the 

resistance  be tween  the

leads with the chart.

                    Typical

                      Motor       Resistance

Winding       Leads          Reading

Main             Black to         Lowest

                      White

Start             Black to           Next

                        Red             Lowest

                                          (Middle)

Both             White to         Highest

                        Red       (Main & Start)

3. Capacitor check.

a. Make sure the ca 

pac 

i 

tor 

is dis 

charged. Use 

extreme caution as a
spark might occur.

b.Disconnect  the  ca pac i tor

leads and connect

an analog-type volt-
ohmmeter to the capacitor
terminals.

c. Set the meter on the

RX1,000 scale to check
the start ca pac i tor. Set the
meter on the RX10,000
scale to check the 
run  ca pac i tor.

d. The meter should in di cate 

low ohms when it is first
connected, but as
the  ca pac i tor  becomes
charged (by the meter), it
will return to a read ing of 
infinity (open circuit).

                                      Typical

                                      Motor                                          Voltage

Component                     Lead                 Mode               Reading

Main Winding               Black to                 Start             Line Voltage

                                        White

Main Winding               Black to                 Run             Line Voltage

                                        White

Start Winding               Black to                 Start             Line Voltage

                                        Red

Start Winding               Black to                 Run                   120%

                                        Red                                         Line Voltage