Trane CH530, CCUN 205-211, CGAN 209-214, CGWN 205-211 manual Diagnostics, CG-SVU02B-E4

Diagnostics

Evaporator Entering Water	Chiller	Normal	Latch	All	Bad Sensor or LLID	Remote
Temp Sensor
Evaporator Leaving Water	Chiller	Normal	Latch	All	Bad Sensor or LLID	Remote
Temp Sensor
Condenser Entering Water	Chiller	Warning	Latch	All	Bad Sensor or LLID	Remote
Temp Sensor
Condenser Leaving Water	Chiller	Warning	Latch	All	Bad Sensor or LLID	Remote
Temp Sensor
Discharge Pressure	Circuit	Normal	Latch	All	Bad Sensor or LLID	Remote
Transducer
Suction Pressure Transducer	Circuit	Immediate	Latch	All	Bad Sensor or LLID	Remote
Suction Temperature Sensor	Circuit	Normal	Latch	All	Bad Sensor or LLID	Remote
Evaporator Protection Water	Circuit	Normal	Latch	All	Bad Sensor or LLID	Remote
Temp Sensor
Low Evap Leaving Water	Chiller or	Warning	NonLatch	Unit in Stop	a) The leaving chilled water temperature fell below the leaving	Remote
Temp: Unit Off	Circuit	and Special		Mode, or in	water temp cutout setting for 16.6°C- seconds while the Chiller
		Action		Auto Mode	is in the Stop mode, or in Auto mode with no compressors
				and No	running. Energize Evap Water pump Relay until diagnostic auto
				Ckt(s)	resets, then return to normal evap pump control. Automatic
				Energized	reset occurs when the temp rises 1.1°C above the cutout
				[Any Ckt	setting for 30 minutes. When this diagnostic is active AND
				Energized]	Leaving Water Temperature sensor diagnostic (loss of comm or
					out of range) the Evap Water pump relay shall be de-energized.
					b) If evaporator protection temperature sensors are installed,
					the effect is on the appropriate circuit. Else, the effect is on the
					chiller.
Low Evap Leaving Water	Chiller or	Immediate	NonLatch	Any Ckt[s]	a) The chilled water temperature fell below the cutout setpoint	Remote
Temp: Unit On	Circuit	and Special		Energized	for 16.6°C-seconds while a compressor was running.
		Action		[No Ckt(s)	Automatic reset occurs when the temperature rises 1.1°C
				Energizd]	above the cutout setting for 2 minutes. This diagnostic shall not
					de-energize the Evaporator Water Pump Output. If this
					diagnostic is active the Low Evap Leaving Water Temp: Unit Off
					diagnostic shall be suppressed.
					b) If evaporator protection temperature sensors are installed,
					the effect is on the appropriate circuit. Else, the effect is on the
					chiller.
Low Refrigerant	Circuit	Immediate	Latch	All except	The Evaporator Saturated Refrigerant Temperature dropped	Local
Temperature				[Service	below the Low Refrigerant Temperature Cutout Setpoint for
				Pumpdown]	16.6°C-seconds.

26 CG-SVU02B-E4