Trane R Series Installation, Operation And Maintenance Manual page 166

Diagnostics
Table 68. Communication diagnostics (continued)
Affects
Diagnostic Name Target Severity
Comm Loss: Suction
Cprsr
Pressure Cprsr 1B
Comm Loss: Suction
Special Immediate
Pressure Cprsr 2A
Comm Loss: Suction
Cprsr
Pressure Cprsr 2B
Excessive Loss of Comm Chiller
Starter 1A Comm Loss:
Cprsr
MP
Starter 1B Comm Loss:
Cprsr
MP
Starter 2A Comm Loss:
Cprsr
MP
Starter 2B Comm Loss:
Cprsr
MP
166
Active
Modes
Persist- [Inactive
ence Modes]
Immediate Latch All
Latch All
Immediate Latch All
Immediate Latch All
Immediate Latch All
Immediate Latch All
Immediate Latch All
Immediate Latch All
Criteria
Continual loss of communication between the MP and the
Functional ID has occurred for a 30 second period. Design Note:
For circuits with manifolded compressors w/o isolation valve
option, this diagnostic will occur with the preceding diagnostic,
even though this transducer is not required or installed.
Continual loss of communication between the MP and the
Functional ID has occurred for a 30 second period. Circuit target
if no isolation valves, Compressor target if isolation valves or
simplex. Design Note: In the case of manifolded compressors w/
o isolation valves, the occurrence of this diagnostic will also
generate a comm loss with the nonexistent Suction Press Cprsr 2B
in order to accomplish circuit shutdown.
Continual loss of communication between the MP and the
Functional ID has occurred for a 30 second period. Design Note:
For circuits with manifolded compressors w/o isolation valve
option, this diagnostic will occur with the preceding diagnostic,
even though this transducer is not required or installed.
Loss of comm with 75% or more (Rev 18 and earlier 10%) 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
Starter has had a loss of communication with MP for a 15 second
period.
Starter has had a loss of communication with MP for a 15 second
period.
Starter has had a loss of communication with MP for a 15 second
period.
Starter has had a loss of communication with MP for a 15 second
period.
Reset
Level
Remote
Remote
Remote
Remote
Local
Local
Local
Local
RTAC-SVX01J-EN