Trane RTHD

152 RTHD-SVX01D-EN
Diagnostics
F5 High Pressure
Cutout
Immediate Latch A high pressure cutout was detected; C.O. on rise @
180 psig, reset @ 135 psig (+/-5 psi on switching
tolerance) Note: Pressure relief valve is 200 Psig +-
2% trip at 315 ± 5 psi. Note: Other diagnostics that
may occur as an expected consequence of the HPC
trip will be suppressed from annunciation. These
include Phase Loss, Power Loss, and Transition
Complete Input Open.
Local
1C6 High Refrigerant
Pressure Ratio
Immediate Latch The system pressure ratio exceeded 5.61 for 1
contiguous minute. This pressure ratio is a funda-
mental limitation of the compressor. The pressure
ratio is defined as Pcond (abs)/Pevap(abs).
Remote
59C Loss of Oil at
Compressor
(Running)
Immediate Latch In running modes , Oil Loss Level Sensor detects
lack of oil in the oil tank feeding the compressor
(distinguishing a liquid flow from a vapor flow)
Local
59D Loss of Oil at
Compressor
(Stopped)
Immediate
and Special
Action
Latch Oil Loss Level Sensor detects a lack of oil in the oil
tank feeding the compressor for 90 seconds after
EXV preposition is completed. Note: Compressor
start is delayed while waiting for oil to be detected.
Local
C5 Low Chilled
Water Temp: Unit
Off
Info and
Special
Action
NonLatch The leaving chilled water temp. fell below the
leaving water temp cutout setting for 30 degree F
seconds while the Chiller is in the Stop mode, or in
Auto mode with no compressors running. Energize
Evap Water pump Relay until diagnostic auto resets,
then return to normal evap pump control. Automatic
reset occurs when the temp rises 2°F (1.1°C) above
the cutout setting for 30 minutes.
Remote
C6 Low Chilled
Water Temp: Unit
On
Immediate
and Special
Action
NonLatch The chilled water temp. fell below the cutout
setpoint for 30 degree F Seconds while the
compressor was running. Automatic reset occurs
when the temperature rises 2 °F (1.1°C) above the
cutout setting for 2 minutes. This diagnostic shall
not de-energize the Evaporator Water Pump Output.
Remote
1AE Low Differential
Refrigerant
Pressure
Immediate Latch 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
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
Remote
18E Low Discharge
Superheat
Normal Latch While Running Normally, the Discharge Superheat
was less than 12 degrees F +- 1F for more than
6500 degree F seconds.. At startup the UCM shall
ignore the Discharge Superheat for 5.
Remote
Table 33 Diagnostic List
Hex
Code
Diagnostic
Name and
Source Severity Persistence Criteria
Reset
Level