Diagnostics
RTAF-SVX001A-EN 77
Low Suction
Refrigerant
Pressure
Low Suction
Rfgt Pressure
Low Suction
Rfgt Pressure
Circuit Immediate Latch
Cprsr Prestart
and Cprsr
Energized
a. The Suction Pressure dropped below 10 Psia just prior to compressor
start (after EXV preposition). b. During Early Startup Period: the
Suction Pressure fell below a pressure equal to Condenser Pressure ÷
8 but as limited to not less than 6 or greater than10 psia. c. After Early
Startup Period expires: The Suction Pressure fell below 16 Psia.
(Note: the Early Startup Period is between 1 and 5 min as an inverse
function of the Cond Temp measured at time of circuit startup).
Local
Mfr
Maintenance
Recommended -
xy
Maint
Recommended
xy
Cprsr Info Latch
Service
Messages
Enabled
Compressor service recommended as service interval hours have
elapsed.
Remote
MP: Invalid
Configuration
None Immediate Latch All MP has an invalid configuration based on the current software installed. Remote
MP: Reset Has
Occurred
None Info Latch All
The main processor has successfully come out of a reset and built its
application. A reset may have been due to a power up, installing new
software or configuration. This diagnostic is immediately and
automatically cleared and thus can only be seen in the Historic
Diagnostic List in Tracer TU.
Remote
No Differential
Refrigerant
Pressure - xy
No Differential
Rfgt Pressure -
xy
No Diff Rfgt
Press - xy
Cprsr Immediate Latch
Compressor
running on
Circuit
The system differential pressure was below 7.7 Psid (53 kPa) for 6
seconds after the 11 seconds ignore time relative to cprsr/circuit
startup had expired.
Remote
Oil Flow
Protection Fault
xy
Cprsr Immediate Latch
Starter
Contactor
Energized [all
Stop modes]
The Intermediate Oil Pressure Sensor for this cprsr is reading a
pressure either above its respective circuit’s Condenser Pressure by 15
Psia or more, or below its respective Suction Pressure 10 Psia or more
for 30 seconds continuously.
Local
Oil Pressure
Sensor - xy
Cprsr Immediate Latch All Bad Sensor or LLID Remote
Oil Temperature
Sensor - xy
Oil Temp Sensor
- xy
Cprsr Normal Latch All Bad Sensor or LLID Remote
Outdoor Air
Temperature
Sensor
Outdoor Air
Temp Sensor
Chiller Normal Latch All Bad Sensor or LLID. Remote
Pumpdown
Terminated By
Time
Circuit Info Latch
Service
Pumpdown
Service Pumpdown cycle for this circuit was terminated abnormally due
to excessive time (RTAF max Service Pumpdown = 4 min.).
Local
Restart Inhibit
Invoked - xy
Restart Inhibit
xy
Cprsr Info Latch All
When restart inhibit warning is enabled, the warning exists when unit
has been inhibited from starting and is cleared when a start of a
compressor is possible (Start-to-Start Timer expires)
Remote
Software Error
1001: Call Trane
Service
SW Error 1001-
Call Trane
All
functions
Immediate Latch All
A high level software watchdog has detected a condition in which there
was a continuous 1 minute period of compressor operation, with neither
Evaporator water flow nor a” contactor interrupt failure” diagnostic
active. The presence of this software error message suggests an
internal software problem has been detected. The events that led up to
this failure, if known, should be recorded and transmitted to Trane
Controls Engineering.
Local
Table 27. Main processor diagnostics (continued)
Diagnostic
Name
Affects
Target Severity Persistence
Active
Modes
[Inactive
Modes] Criteria
Reset
Level
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