Trane Technologies RTAG 225, Installation Operation & Maintenance

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Diagnostic Name Affects
Target
Severity Persistence Active Modes
[Inactive Modes]
Criteria Reset
Level
High Refrigerant
Pressure Ratio - xy
Cprsr Immediate Latch Cprsr Energized The pressure ratio for the respective
circuit exceeded 12.3 for 1 contiguous
minute while any compressor is running
or in service pumpdown. This pressure
ratio is a fundamental limitation of the
HiVi compressor. The pressure ratio is
Remote
High Oil Tempera-
ture - xy
Cprsr Immediate Latch All
[compressor run
unload or compres-
sor not running]
The oil temperature entering the com-
pressor exceeded 199.4°F.
Remote
Oil Temperature
Sensor - xy
Cprsr Normal Latch All Bad Sensor or LLID Remote
High Compressor
Refrigerant Dis-
charge Temp - xy
Cprsr Immediate Latch All
[compressor run
unload or compres-
sor not running]
The compressor discharge temperature
exceeded 199.4°F (without oil cooler) or
230ºF (with oil cooler). This diagnostic
will be suppressed during Stopping mode
or after the compressor has stopped.
Note: As part of the Compressor High
Temperature Limit Mode (aka Minimum
Capacity Limit), the compressor shall be
temperature reaches 190ºF (without oil
coolers), or 220ºF (with oil coolers).
Remote
Low Discharge Su-
perheat - xy
Cprsr Normal Latch Any Running Mode While Running Normally, the Discharge
Superheat was less than the Low Dis-
charge Superheat Setpoint for more
than 7800 degree F seconds. At circuit
startup, the Discharge Superheat will be
ignored for 5 minutes.
Remote
Compressor Dis-
charge Refrigerant
Temperature Sensor
- xy
Cprsr Immediate Latch All Bad Sensor or LLID Remote
Restart Inhibit In-
voked - xy
Cprsr Warning NonLatch 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
BAS Failed to Estab-
lish Communication
Chiller Warning
and Special
Action
NonLatch At power-up The BAS was setup as "installed" and
the BAS did not communicate with the
Lontalk LCIC within 15 minutes after
chiller controls power-up. Refer to Sec-
tion on Setpoint Arbitration to determine
how setpoints and operating modes may
be affected. Note that this diagnostic is
never operational for BACnet Communi-
cation interface (BCIC) and only oper-
ational with a LonTalk Communication
BAS or Tracer system.
Remote
BAS Communication
Lost
Chiller Warning
and Special
Action
NonLatch All The BAS was setup as "installed" at the
MP and the Lontalk LCIC lost communi-
cations with the BAS for 15 contiguous
minutes after it had been established.
Refer to Section on Setpoint Arbitration
to determine how setpoints and operat-
ing modes may be affected by the comm
loss. The chiller follows the value of the
Tracer Default Run Command which
can be previously written by Tracer and
stored nonvolatile by the MP (either use
local or shutdown). Note that this di-
agnostic is never operational for BACnet
Communication interface (BCIC) and
only operational with a LonTalk Commu-
by the BAS or Tracer system.
Remote
RTAG-SVX001H-EN 85