Troubleshooting - Trane RTHA Installation, Operation And Maintenance Manual

Troubleshooting

Troubleshooting
Table 3. Troubleshooting chart
Description of the Problem
Chiller starts but only runs for a few seconds.
Compressor starts immediately when power is applied.
Compressor starts, runs less than 10 seconds and
CH530 shuts down on a "Phase Reversal" diagnostic.
While chiller is in "Auto" mode and compressor is off
the shunt trip opens locking out compressor.
Shunt trips opens on compressor start.
See Troubleshooting guides RTHD-SVD02*-EN and RLC-SVD06*-EN for more information.
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Possible Causes
• Typically caused from a mis-wire of the low voltage.
• Start command of the Benshaw Redistart wired incorrectly directly to 120 Vdc.
• CH530 not programmed correctly. Disable "Phase Reversal" in CH530 controller.
• Troubleshoot the Benshaw SSS using RTHD-SVD02*-EN. Possible problem with SCR.
• P1 setting of Benshaw starter set incorrectly. Remove power to the unit and reprogram
all "P" parameters of the Benshaw starter.
(To program starter, apply external 120V to logic modules.)
(
• Faulty shunt trip.
RLC-SVN005B-EN