Trane RTHD series - Diagnostics Table Entries

Diagnostics
114 RTHD-SVX02H-EN
Table 35. Diagnostics Table
Hex
Code
Diagnostic Name
and Source
Severity Persistence Criteria Reset
Level
AB Evaporator
Leaving Water
Temperature
Sensor
Normal Latch Bad Sensor or LLID Remote
27D Evaporator Liquid
Level Sensor
Normal Latch Bad Sensor or LLID Remote
5BA Evaporator Refriger-
ant
Pressure
Transducer
Normal Latch Bad Sensor or LLID Remote
ED Evaporator Water
Flow Lost
Immediate NonLatch The chilled water ow proof input was open for more than 6-10
contiguous seconds after ow had been proven. The pump com-
mand status will not be effected. 6-10 seconds of contiguous ow
shall clear this diagnostic. Even though the pump may be com-
manded to run in the STOP modes (pump off delay time), this
diagnostic shall not be called out in the STOP modes.
Remote
384 Evaporator Water
Flow Overdue
Normal NonLatch Evaporator water ow was not proven within 20 minutes of the
Chilled water pump relay being energized. The Evap pump com-
mand status will not be effected.
Remote
5C4 Excessive Loss of
Comm
Immediate Latch Loss of comm with 20% or more of the llids congured for the
system has been detected. This diagnostic will suppress the
callout of all subsequent comm loss diagnostics. Check power
supply(s) and power disconnects - troubleshoot LLIDS buss using
TechView
Remote
4C4 External Base Load-
ing Setpoint
Info and Spe-
cial Action
NonLatch a. Not “Enabled”: no diagnostics. b. “Enabled “: Out- Of-Range
Low or Hi or bad LLID, set diagnostic, default BLS to next level of
priority (e.g. Front Panel SetPoint. This Info diagnostic will auto-
matically reset if the input returns to the normal range.
Remote
87 External Chilled Wa-
ter Setpoint
Info NonLatch a. Function Not “Enabled”: no diagnostics. b. “Enabled “: Out-Of-
Range Low or Hi or bad LLID, set diagnostic, default CWS to next
level of priority (e.g. Front Panel SetPoint). This Info diagnostic
will automatically reset if the input returns to the normal range.
Remote
89 External Current
Limit Setpoint
Info NonLatch a. Not “Enabled”: no diagnostics. b. “Enabled “: Out- Of-Range
Low or Hi or bad LLID, set diagnostic, default CLS to next level of
priority (e.g. Front Panel SetPoint. This Info diagnostic will auto-
matically reset if the input returns to the normal range.
Remote
1C2 High Compressor
Discharge Tempera-
ture
Immediate Latch The compressor discharge temperature exceeded 190°F. This
diagnostic will be suppressed if it occurs during the compressor
run-unload period or after the compressor has stopped, but a run
unload will be terminated early as a result. Note: As part of the
Compressor High Temperature Limit Mode (aka Minimum Capac-
ity Limit), the compressor shall be forced loaded as the ltered
discharge temperature nears this trip-point.
Remote
1C6 High Differential
Refrigerant Pressure
Normal Latch a. The system differential pressure was above 160 Psid- trip im-
mediately (normal shutdown) B The diff pressure was above 152
Psid - trip in 1 hour
Remote
584 High Evaporator
Liquid Level
Normal Latch The liquid level sensor is seen to be at or near its high end of
range for 80 contiguous minutes while the compressor is running.
(The diagnostic timer will hold, but not clear when the circuit is
off). Design: 80% or more of bit count corresponding to +21.2
mm or more liquid level for 80 minutes)
Remote
6B8 High Evaporator
Refrigerant Pressure
Immediate
and Special
Action
NonLatch The evaporator refrigerant pressure has risen above 190 psig.
The evaporator water pump relay will be de-energized to stop the
pump regardless of why the pump is running. The diagnostic will
auto reset and the pump will return to normal control when the
evaporator pressures falls below 185 psig. This diagnostic must
shutdown the chiller if it is running.
Local
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: Pres-
sure 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 min-
ute. This pressure ratio is a fundamental limitation of the com-
pressor. The pressure ratio is dened as Pcond (abs)/Pevap(abs).
Remote
59C Loss of Oil at Com-
pressor (Running)
Immediate Latch In running modes , Oil Loss Level Sensor detects lack of oil in the
oil tank feeding the compressor (distinguishing a liquid ow from
a vapor ow)
Local