Trane CGAN 209-214, CCUN 205-211, CH530, CGWN 205-211 manual Communication Diagnostics

Diagnostics

Table 6 - Communication Diagnostics

Notes:

1.The following communication loss diagnostics will not occur unless that input or output is required to be present by the particular configuration and installed options for the chiller.

2.Communication diagnostics (with the exception of "Excessive Loss of Comm" are named by the Functional Name of the input or output that is no longer being heard from by the Main Processor.

Many LLIDs, such as the Quad Relay LLID, have more than one functional output associated with it. A comm loss with such a multiple function board will generate multiple diagnostics. Refer to the Chiller's wiring diagrams to relate the occurrence of multiple communication diagnostics back to the physical llid boards that they have been assigned to (bound).

Diagnostic Name	Effects	Severity	Persistence	Active	Criteria	Reset
				Modes		Level
				[Inactive
				Modes]
Excessive Loss of Comm	Chiller	Immediate	Latch	All	Loss of comm with 20% or more of the llids configured for the	Remote
					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
Comm Loss:	Chiller	Normal	Latch	All	Continual loss of communication between the MP and the	Remote
External Auto/Stop					Functional ID has occurred for a 35-40 second period.
Comm Loss:	Chiller	Normal	Latch	All	Continual loss of communication between the MP and the	Remote
Emergency Stop					Functional ID has occurred for a 35-40 second period.
Comm Loss:	Chiller	Warning	Latch	All	Continual loss of communication between the MP and the	Remote
Ext Ice Building Ctrl Input					Functional ID has occurred for a 35-40 second period. Chiller
					shall revert to normal (non-ice building) mode regardless of last
					state.
Comm Loss:	Chiller	Warning	Latch	All	Continual loss of communication between the MP and the	Remote
Outdoor Air Temperature					Functional ID has occurred for a 35-40 second period. If
					configured as an air-cooled this diagnostic shall turn on all fans
					and use a minimum LPC ignore time of 30 seconds.
Comm Loss:	Chiller	Normal	Latch	All	Continual loss of communication between the MP and the	Remote
Evap Leaving Water Temp					Functional ID has occurred for a 35-40 second period.
Comm Loss:	Chiller	Normal	Latch	All	Continual loss of communication between the MP and the	Remote
Evap Entering Water Temp					Functional ID has occurred for a 35-40 second period.
Comm Loss:	Chiller	Warning	Latch	All	Continual loss of communication between the MP and the	Remote
Condenser Leaving Water					Functional ID has occurred for a 35-40 second period.
Temp
Comm Loss:	Chiller	Warning	Latch	All	Continual loss of communication between the MP and the	Remote
Condenser Entering Water					Functional ID has occurred for a 35-40 second period.
Temp
Comm Loss:	Circuit	Normal	Latch	All	Continual loss of communication between the MP and the	Remote
Discharge Pressure					Functional ID has occurred for a 35-40 second period.
Transducer

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