Trane RTHC - Page 48

Compressor Load-Unload Solenoid
42 RTHC-SVD01B-EN
.
Table 6-1: Possible Causes to Loading Problem
Possible
Operation
Recorded
Measurement
Load Unload Hold
Operating properly Piston Pressure increase decrease remain constant
Amp Draw increase decrease remain constant
Stuck piston Piston Pressure increase decrease remain constant
Amp Draw remain constant remain constant remain constant
Leaking load solenoid,
internal leak or leaking
piston
Piston Pressure increase may drop initially
but will increase
as aoon as the
unload is
deenergized
increase
Amp Draw increase may drop initially
but will increase
as aoon as the
unload is
deenergized
increase
Leaking unload
solenoid
Piston Pressure remain constant
or decrease
decrease decrease
Amp Draw remain constant
or decrease
decrease decrease