Trane R Series Installation Operation & Maintenance page 147

Table 28 Diagnostic Codes
Diagnostic Description
Contactor CPRSR A
Contactor CPRSR B
Contactor CPRSR C
Contactor CPRSR D
CPRSR Suct Temp Sensor - Ckt 1
CPRSR Suct Temp Sensor - Ckt 2
CWS/Leaving Water Temp Cutout
Setpoint Overlap
Discharge Temp - Cprsr A
Discharge Temp - Cprsr B
Discharge Temp - Cprsr C
Discharge Temp - Cprsr D
Emergency Stop
Entering Oil Temp Sensor - Cprsr A
Entering Oil Temp Sensor - Cprsr B
Entering Oil Temp Sensor - Cprsr C
Entering Oil Temp Sensor - Cprsr D
Evap Entering Wtr Temp Sensor
Evap Leaving Wtr Temp Sensor
Evap Rfgt Temp Sensor - CKT 1
Evap Rfgt Temp Sensor - CKT 2
RLC-SVX07A-EN
Diagnostics
Type Cause
MMR a.
b.
MMR Same as CPRSR A.
MMR Same as CPRSR A.
MMR Same as CPRSR A.
CMR Open or short.
CMR Open or short.
None No diagnostic, display to flash and 1imit value to last legal
value.
NOTE: The above is not a diagnostic because you
don't want the display vectoring you to a different
display state when you are trying to set either the
chilled water setpoint or the leaving water temp.
cutout setpoint as it will in the case of a diagnostic.
CMR a.
b.
c.
CMR Same as Diagnostic for Cprsr A, above.
CMR Same as Diagnostic for Cprsr A, above.
CMR Same as Diagnostic for Cprsr A, above.
MMR EMERGENCY STOP input is open. An external interlock has
tripped. Time to trip from input opening to unit stop shall be
0.1 to 1.0 seconds.
CMR Open or short.
CMR Open or short.
CMR Open or short.
CMR Open or short.
MMR Open or short.
MMR Open or short.
CMR Open or short (for 30 sec).
CMR Open or short (for 30 sec).
Welded cprsr contactor.
Detected a welded compressor contactor when the
compressor was commanded off but the current does
not go to zero. Detection time shall be 5 second
minimum and 10 seconds maximum. On detection,
generate the diagnostic, energize the appropriate alarm
relay, continue to command the affected compressor off,
energize the affected compressors oil line solenoid, stop
all other compressors, unload the running compressor
with the welded contactor, open the EXV to its
maximum open position, and continue to do fan control.
Do not exit this condition until the controller is manually
reset.
The discharge temp. exceeded the trip value;
135 + or -3 C.
The discharge temp. PTC or wiring is open.
Time to trip from either trip value exceeded or input
open shall be 0.5 to 2.0 seconds.
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