Lorentz PS200 Instructions For Installation Operation Service page 49

Problem Report Form continued
Measure each pair L1-L2, L1-L3, L2-L3. These are the "three phases".
EACH READING MUST BE EQUAL. Wait until the pump is up to speed to check for equal.
L1-L2
IF THE PUMP RUNS, make the following three tests.
If not, skip to RESISTANCE MEASUREMENT below.
Measure AC amps through any one motor wire.
Normal range for working pump is 1 - 9 A
(a normal AC clamp-on meter will work)
cf. Test #6/6A
DC Volts on 3 motor phases — YES, set the meter to DC and test as above.
Around than 1/10V is good. Around 1/2V is bad.
Note here only if bad
MOTOR CIRCUIT RESISTANCE (Test #7)
This will test the integrity of the motor and the wiring to it. This is done with NO POWER
applied. If you are not familiar with measuring resistance, please refer to your meter's
instruction manual. You will need to use the lowest ohms range on your meter. Hold the probes
tightly to the wires and scratch then a little to ensure good contact. Hold tight until the meter
display shows the LOWEST reading that you can get. Holding the probes with your fingers will
not alter the reading.
DISCONNECT the motor wires (L1 / L2 / L3) from the junction box.
Measure the resistance between each pair on the motor cable
L1-L2
The resistance must be in the range of 0.1 to 1.5 ohms — ALL EQUAL.
Resistance of each pump wire to ground – There should
be NO continuity. A meter reading should be much higher
than 100K ohms. DO NOT TOUCH the wires or probes with
your fingers when reading this high range, or your own body
continuity will reduce the reading, cf. Test #8
If you see false indications of the lights for SOURCE LOW or
TANK LOW, cf. Test #9/10/11
Water Temperature
Is the water warmer than 72
helical rotor to tighten due to expansion of the rubber stator.
Notes
Page 3/3 of Problem Report Form
L1-L3
L1-L3
o F (22 o C)? This can cause a
L2-L3
A AC
V DC
L2-L3
o F / o C
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