Trane RTAA-70 Installation & Maintenance Manual page 134

Table 19 Diagnostic Codes
Diagnostic Description
Winding Temp - Cprsr B
Winding Temp - Cprsr C
Winding Temp - Cprsr D
Zone Temp Sensor (Zone Reset Selected)
Zone Temp Sensor (Zone Reset not Selected)
134
Diagnostics
Type Cause
CMR Same as Diagnostic for Cprsr A, above.
CMR Same as Diagnostic for Cprsr A, above.
CMR Same as Diagnostic for Cprsr A, above.
IFW Open or Short.
a.
b.
c.
None a.
b.
Use end of range value (whatever value the open or
short gives).
Clear diag. when the resistance returns to normal range.
If Shorted, go into the ice making mode if "Ice Machine
Control" is enabled.
If Open, do normal chiller control.
If Shorted, go into the ice making mode if "Ice Machine
Control " is enabled.
RTAA-SVX01A-EN