Main Processor Diagnostics - Trane Tracer TD7 User Manual

Diagnostics

Main Processor Diagnostics

Hex
Diagnostic Name
Code
MP: Reset Has
D9
Occurred
Unexpected Starter
6B5
Shutdown
Low Evaporator
FB Refrigerant
Temperature
198 Low Oil Flow
Loss of Oil at
59C Compressor
(Running)
Loss of Oil at
59D Compressor
(Stopped)
Low Differential
1AE
Refrigerant Pressure
No Differential
297
Refrigerant Pressure
20
Effects
Severity Persistence
Target
Chiller Info NonLatch
Chiller Normal Nonlatch
Chiller Immediate Latch
Chiller Immediate Latch
Chiller Immediate Latch
Immediate
Chiller and Special Latch
Action
Chiller Immediate Latch
Chiller Immediate Latch
Active Modes
[Inactive Modes]
The main processor has successfully come
out of a reset and built its application.
A reset may have been due to a power up,
All installing new software or confi guration. This
diagnostic is immediately and automatically
cleared and thus can only be seen in the
Historic Diagnostic List in TechView
All Cprsr Running The Starter module status reported back that
modes, Starting, it is stopped when it should be running and
Running and no Starter diagnostic exists. This diagnostic
Preparing to will be logged in the active buffer and then
Shutdown cleared.
a. The inferred Saturated Evap Refrigerant
Temperature (calculated from suction
pressure transducer(s)) dropped below the
Low Refrigerant Temperature Cutout Setpoint
for 450°F-sec (10°F-sec max rate) while the
circuit was running after the ignore period
had expired. The integral is held at zero for
the 1 minute ignore time following the circuit
startup and the integral will be limited to
All Ckt Running never trip in less than 45 seconds, i.e. the
Modes error term shall be clamped to 10°F. The
minimum LRTC setpoint is -5°F (18.7 Psia)
the point at which oil separates from the
refrigerant. b. During the timeout of the
trip integral, the unload solenoid(s) of the
running compressors on the circuit, shall be
energized continuously and the load solenoid
shall be off. Normal load/unload operation
will be resumed if the trip integral is reset by
return to temps above the cutout setpoint.
The oil pressure was out of the acceptable
pressure range for 15 seconds, while the
Delta Pressure was greater than 15 Psid.:
Chiller Energized
Acceptable range is 0.50 or 0.60 > (PC-Po) /
and Delta P above
(PC-PE) for the fi rst 2.5 minutes of operation,
15 Psid
and 0.40 or 0.50 > (PC-Po) / (PC-PE)
thereafter. The higher ratios used if the
system DP is less than 23 psid
In running modes , Oil Loss Level Sensor
Starter Contactor detects lack of oil in the oil tank feeding the
Energized compressor (distinguishing a liquid fl ow from
a vapor fl ow)
Oil Loss Level Sensor detects a lack of oil in
Compressor Pre- the oil tank feeding the compressor for 90
start [all other seconds after EXV preposition is completed.
modes] Note: Compressor start is delayed while
waiting for oil to be detected.
The system differential pressure was either
below 15 Psid for more than 164 Psid-sec,
or below 23.0 Psid for 3000 Psid-sec. The
latter integral's value is not cleared for any
reason including diagnostic trip, manual
reset, or power up reset (ie. Integral is saved
Chiller Energized
nonvolatily on power down). The integral will
decay while circuit is running at a max rate
of –10 PSID, and while stopped at a rate of
–0.4 PSID. This same integral is associated
with the operating mode "Compressor Cool
Down". Also see diagnostic below
The system differential pressure was below
7.7 Psid. The occurrence of this diagnostic
Chiller Energized will saturate the above "Low Diff Rfgt Press"
Integral and invoke the same "Compressor
Cool Down" op mode.
Reset
Criteria
Level
Remote
Remote
Local
Local
Local
Remote
Remote
RLC-SVU006A-E4
NA