Lorentz PS2 - How to Check the Resistance of the Motor Phases

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BERNT LORENTZ GmbH
Siebenstücken 24, 24558 Henstedt-Ulzburg, Germany,
Tel (+49) 0 4193 8806-700, www.lorentz.de
All specifications and information are given with good intent, errors are possible and products may be subject to change without notice.
Pictures may differ from actual products depending on local market requirements and regulations.
Guide for troubleshooting for PS2 pump controller
Version: V210126
6.9. How to check the resistance of the motor phases
• Configure your multimeter
o Choose resistance –
measurement
o Test prods into its provided
sockets (black to COM & red
to Ω)
• The measurement is easier by using
those crocodile clips
• Connect the measuring clips to the
motor phases (3 different steps – L1
to L2, L2 to L3 and L3 to L1)
Check whether the resistance between the motor phases are on the same level. The following
list gives a rough resistance value of the motor phases separated by the different motor types.
The value is depending a lot on several conditions (accuracy of the multimeter/measuring with
or without submersible cable/…), therefore it is more important that the resistance is on the
same level.
Product
Resistance, measured value:
L1-L2
[Ω]
L1-L2
[Ω]
L1-L2
[Ω]
ECDRIVE 150
0,4
0,4
0,4
ECDRIVE 200
0,5
0,5
0,5
ECDRIVE 600
0,5
0,5
0,5
ECDRIVE 1800
0,8
0,8
0,8
ECDRIVE 4000
0,9
0,9
0,9
Tolerance: ±0,2 Ω