6 – 8
VSS/VSM/VSH/VSSH • Installation, Operation and Maintenance Manual • Emerson • 35391SD
Section 6 • Troubleshooting
Problem Solution
High Amp Draw
• Check calibration at full load.
• Check CT ratio entered in Vission 20/20.
• Check slide valve calibration, especially volume slide.
Vibration
• Check that unit is leveled and secured to mounting pad or oor.
• Check supported pipes (i.e. suction and discharge pipe) and make
sure they are adequately supported.
• Check for loose bolts and nuts.
• Check condition of compressor and motor (i.e. alignments)
Excessive Motor Backspin
• If there is more than normal motor backspin at shutdown, check suc-
tion check valve for proper operation.
Table 6-3. Troubleshooting Guide - General Problems & Solutions (3 of 3)
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