Trane R Series Installation, Operation And Maintenance

Diagnostics
166 RTAC-SVX01J-EN
Comm Loss: Suction
Pressure Cprsr 1B
Cprsr Immediate Latch All
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.
Remote
Comm Loss: Suction
Pressure Cprsr 2A
Special Immediate Latch All
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.
Remote
Comm Loss: Suction
Pressure Cprsr 2B
Cprsr Immediate Latch All
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.
Remote
Excessive Loss of Comm Chiller Immediate Latch All
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
Remote
Starter 1A Comm Loss:
MP
Cprsr Immediate Latch All
Starter has had a loss of communication with MP for a 15 second
period.
Local
Starter 1B Comm Loss:
MP
Cprsr Immediate Latch All
Starter has had a loss of communication with MP for a 15 second
period.
Local
Starter 2A Comm Loss:
MP
Cprsr Immediate Latch All
Starter has had a loss of communication with MP for a 15 second
period.
Local
Starter 2B Comm Loss:
MP
Cprsr Immediate Latch All
Starter has had a loss of communication with MP for a 15 second
period.
Local
Table 68. Communication diagnostics (continued)
Diagnostic Name
Affects
Target Severity
Persist-
ence
Active
Modes
[Inactive
Modes] Criteria
Reset
Level

Trane R Series Specifications

General

Brand	Trane
Model	R Series
Category	Chiller
Language	English