Phase Technology SD Series Troubleshooting Manual

Transducer Troubleshooting Guide

Installation Guidelines

1. Do not route the transducer wire in the same conduit or parallel to the motor leads
2. Cut the transducer wire to length. We do not recommend splicing transducer wire. If a wire must be
spliced the additional wire should be shielded and the splice should be a soldered connection. DO NOT
USE WIRE NUTS
3. Do not roll or coil the transducer wire
4. Transducer wire must cross the motor leads at 90 degrees if they must cross
5. Use a 3" non-metallic "T" fitting to prevent noise from coupling to the transducer wire
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Identifying Transducer Noise

1. Check the 4-20 mA input under Read Measured Values for unstable reading. Press Enter navigate to
Read Measured Values press enter and navigate to "4-20 ma I1 Input"
2. Does pressure change immediately when the VFD starts?
3. Is the drive acting erratically or displaying "Restart 3-2-1" without a fault being displayed? This indicates
the transducer is seeing an overpressure event. (Note: Check "Overpressure PSI" under Constant
Pressure Parameters if it is set too low it can also cause this problem)
222 Disk Drive
Rapid City, SD 57701
Intuitively Engineered
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