Trane Rtaaiom3 Manual

111RTAA-IOM-3
Table 18
Diagnostics and Troubleshooting Chart (Continued)
DIAG. ACTIVE
CODE DIAGNOSTIC DESCRIPTION TYPE MODES CAUSE
NONE Outdoor Air Temperature None All Open or Short
Sensor (Both Outdoor Air a. Display dashes e.g. 14 - - - - -”,
Reset or Low Ambient Lockout
Not Selected)
Ab Evap. Leaving Water Temp. Sensor MMR All Open or Short
bA Overload Trip - Compressor A CMR Compressor  Energized Compressor current exceeded overload
time vs. trip characteristic.
bb Overload Trip - Compressor B CMR...

112RTAA-IOM-3
Table 18
Diagnostics and Troubleshooting Chart (Continued)
DIAG. ACTIVE
CODE DIAGNOSTIC DESCRIPTION TYPE MODES CAUSE
d8 Under Voltage MAR Pre-start and a. Line voltage below -10% of nominal
Any Circuit(s) Energized the Under/Over transformer is not
connected. (Must hold = -10% of
nominal Must trip = -15% of nominal).
Ed Chilled Water Flow Interlock MAR All Modes Except a. The chilled water flow switch input
STOP (00) and was open for more than 6 seconds.
EXTERNAL STOP (100)
F5 High Pressure...

113RTAA-IOM-3
Table 18
Diagnostics and Troubleshooting Chart (Continued)
DIAG. ACTIVE
CODE DIAGNOSTIC DESCRIPTION TYPE MODES CAUSE
190 Low Superheat Circuit 1 CMR All Running Modes a. A low superheat condition existed
for an extended period of time. If a
superheat less than or equal to 2 F is
detected for more than 2400 F
seconds, the circuit shall be shut
down. The integrated area (2400 F
seconds) shall be only below 2 F
superheat.
191 Low Superheat - Circuit 2 CMR All Running Modes Same as diagnostic...

114RTAA-IOM-3
Table 18
Diagnostics and Troubleshooting Chart (Continued)
DIAG. ACTIVE
CODE DIAGNOSTIC DESCRIPTION TYPE MODES CAUSE
1A4 Remote Communications Loss IFW All AUTO/REMOTE Modes a. While the chiller switch was in the
AUTO/REMOTE the communication
between the CSR and the connected
remote device, e.g. a Tracer or
Remote Display, had either never
been established for more than 15
minutes after power up or was lost for
more than 15 minutes after it had
been established; use the Front Panel...

115RTAA-IOM-3
Table 18
Diagnostics and Troubleshooting Chart (Continued)
DIAG. ACTIVE
CODE DIAGNOSTIC DESCRIPTION TYPE MODES CAUSE
1Ad  Memory Error Type I  IFW UCM Power Up or a. On UCM power up or following a
Following a Type II Type II Memory Error a NOVRAM
Memory Error memory error was detected. The UCM
is operating on all Engineering ROM
defaults for all setup parameters.
Check all I setup parameters and
continue to run chiller. Replace the
Chiller Module as soon as a
replacement is available.
1AE...

116RTAA-IOM-3
Table 18
Diagnostics and Troubleshooting Chart (Continued)
DIAG. ACTIVE
CODE DIAGNOSTIC DESCRIPTION TYPE MODES CAUSE
1bE Winding Temp.- Compressor A CMR All a. The motor winding temperature
 thermostat opened; nominally 221 F.
b. The motor temperature thermostat or
 wiring is open.
c.  Time to trip from input open to
 compressor shutdown shall be 0.5 to
 2.0 seconds.
1bF Winding Temp.- Compressor B CMR All Same as diagnostic 1bE.
1C0 Winding Temp.- Compressor C CMR All Same as diagnostic...

117RTAA-IOM-3
Table 18
Diagnostics and Troubleshooting Chart (Continued)
DIAG. ACTIVE
CODE DIAGNOSTIC DESCRIPTION TYPE MODES CAUSE
1d3 Comp. Suction Temp. Sensor - CMR All a . Open or Short in sensor electrical
Circuit 1  circuitry.
1d4 Comp. Suction Temp. Sensor - CMR All a. Open or Short in sensor electrical
Circuit 2 circuitry.
1d7 Phase Reversal Protection Lost - CMR Compressor Energized to a. The phase reversal protection
Compressor A To Transition Command Compressor A has become
inoperative. The...

118RTAA-IOM-3
Table 18
Diagnostics and Troubleshooting Chart (Continued)
DIAG. ACTIVE
CODE DIAGNOSTIC DESCRIPTION TYPE MODES CAUSE
435 1U3 Indicating CMR All The 1U3 Module has detected a loss of
1U5 Communications inter-processor communications from
the 1U5 Module.
436 1U3 Indicating CMR All The 1U3 Module has detected a loss of
1U6 Communications inter-processor communications from
the 1U6 Module.
437 1U3 Indicating CMR All The 1U3 Module has detected a loss of
1U7 Communications. inter-processor...

119RTAA-IOM-3
Table 18
Diagnostics and Troubleshooting Chart (Continued)
DIAG. ACTIVE
CODE DIAGNOSTIC DESCRIPTION TYPE MODES CAUSE
481 1U8 Indicating MMR All The 1U8 Module has detected a loss of
1U1 Communications inter-processor communications from
the 1U1 Module.
483 1U8 Indicating CMR* All The 1U8 Module has detected a loss of
1U3 Communications inter-processor communications from
the 1U3 Module.
484 1U8 Indicating CMR All The 1U8 Module has detected a loss of
1U4 Communications inter-processor...

120RTAA-IOM-3