Trane R Series Installation Operation & Maintenance page 150

Table 28 Diagnostic Codes
Diagnostic Description
Oil System Fault - Ckt 1
Oil System Fault - Ckt 2
Outdoor Air Temp Sensor (Both Outdoor Air
Reset and Low Ambient Lockout not selected)
Outdoor Air Temp Sensor (Either Outdoor Air
Reset or Low Ambient Lockout selected.)
Over Voltage
Overload Trip - CPRSR A
Overload Trip - CPRSR B
Overload Trip - CPRSR C
Overload Trip - CPRSR D
Phase Loss - Cprsr A
Phase Loss - Cprsr B
Phase Loss - Cprsr C
Phase Loss - Cprsr D
Phase Reversal - Cprsr A
Phase Reversal - Cprsr B
Phase Reversal - Cprsr C
Phase Reversal - Cprsr D
Phase Rev Prot Lost Cprsr A
Phase Rev Prot Lost - Cprsr B
Phase Rev Prot Lost - Cprsr C
Phase Rev Prot Lost - Cprsr D
Phase Unbalance - Cprsr A
Phase Unbalance - Cprsr B
Phase Unbalance - Cprsr C
150
Diagnostics
Type Cause
CMR Entering Oil Temp on either compressor of the given circuit
reads a temperature x degrees below the given ckts' saturated
condenser temperature for more than 30 minutes where x is
the Oil Loss Differential Setpoint (2 degree F hysterisis to
clear timer).
CMR Same as for Ckt 1, above.
None Open or short.
a.
I FW Open or short.
a.
b.
MAR Line voltage above + 10% of nominal. (Must hold = + 10% of
nominal. Must trip = + 15% of nominal. Reset differential =
min. of 2% and max. of 4%. Time to trip = minimum of 10 sec.
and maximum of 20 seconds.)
Design: Nom. trip: 15 seconds at greater than 113.5%,
± 2.8% at 200V, or ± 1.8% at 575V, Auto reset at 110.5% or
less.
CMR Cprsr current exceeded overload time vs. trip characteristic.
CMR Same as Diagnostic for Cprsr A.
CMR Same as Diagnostic for Cprsr A.
CMR Same as Diagnostic for Cprsr A.
CMR No current was sensed on one or more of the current x former
inputs. (Must hold = 20% RLA. Must trip = 5% RLA.) Time to
trip shall be 1 second minimum, 3 seconds maximum.
CMR Same as Diagnostic for Cprsr A, above.
CMR Same as Diagnostic for Cprsr A, above.
CMR Same as Diagnostic for Cprsr A, above.
CMR A phase reversal was detected on the incoming current. On a
compressor startup the phase reversal logic must detect and
trip in a maximum of 1.0 second from compressor start.
CMR Same as Diagnostic for Cprsr A, above.
CMR Same as Diagnostic for Cprsr A, above.
CMR Same as Diagnostic for Cprsr A, above.
CMR The phase reversal protection on compressor A has become
inoperative. The phase rotation protection system failed to
detect 2 in a row of one of the four phase circuit states: Phase
reversal, Phase rotation OK, Phase A lost., Phase B lost.
CMR Same as Cprsr A, above, but Cprsr B.
CMR Same as Cprsr A, above, but Cprsr C.
CMR Same as Cprsr A, above, but Cprsr D.
CMR A 15% phase unbalance condition has been detected.
CMR Same as Diagnostic for Cprsr A.
CMR Same as Diagnostic for Cprsr A.
Display dashes e.g. "14----" .
Use end of range value (whatever value the open or
short.
Clear diag. when the resistance returns to normal range.
RLC-SVX07A-EN