Trane RTHD Troubleshooting Manual page 53

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Table 9. Possible Causes to Loading Problem
Possible Operation
Operating properly
Stuck piston
Leaking load solenoid,
internal leak or leaking
piston
Leaking unload solenoid
RLC-SVD05A-EN
Compressor Capacity - RTAC
Recorded
Measurement
Piston Pressure
Amp Draw
Piston Pressure
Amp Draw
Piston Pressure
Amp Draw
Piston Pressure
Amp Draw
Load Unload
increase decrease
increase decrease
increase decrease
remain constant remain constant
increase may drop initially but
will increase as soon
as the unload is de-
energized
increase may drop initially but
will increase as soon
as the unload is de
energized
remain constant or decrease
decrease
remain constant or decrease
decrease
Hold
remain constant
remain constant
remain constant
remain constant
increase
increase
decrease
decrease
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