Trane RTHD

RTHD-SVX01D-EN 151
Diagnostics
5C4 Excessive Loss of
Comm
Immediate Latch Loss of comm with 20% or more of the llids
configured 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
Loading Setpoint
Info and
Special
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 automatically
reset if the input returns to the normal range.
Remote
87 External Chilled
Water 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 automatically
reset if the input returns to the normal range.
Remote
1C2 High Compressor
Discharge
Temperature
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 Capacity Limit), the compressor shall be
forced loaded as the filtered discharge temperature
nears this trip-point.
Remote
1C6 High Differential
Refrigerant
Pressure
Normal Latch a. The system differential pressure was above 160
Psid- trip immediately (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
Table 33 Diagnostic List
Hex
Code
Diagnostic
Name and
Source Severity Persistence Criteria
Reset
Level