McQuay MDS 180B User Manual

Service Manual SM-MDS_(ii) 39
ii) Outdoor Refrigerant Diagram
This allows the user to understand the refrigerant circuit within the outdoor unit. The different colors on the
refrigerant line indicate the type of mode the outdoor unit is operating. It also shows the sensors location which
helps if the user cannot remember the function of the sensor shows in the outdoor unit monitoring chart.
iii) Indoor Unit Control and Monitoring
When using the Smart Commander, the user can activate the indoors via the software. This allows
troubleshooting to be carried out easily without the needs to go to the indoor unit to turn it on. Besides that, a list
of information on the indoor model is also visible.
Red Line: Heating
Sensor location
Outdoor Model
Outdoor address
Black Line: Stop
Green Line: Cooling / Dry
Indoor Data
Type of indoor and model
Tr : Return air temperature
To : Coil outlet temperature
Tm : Coil middle temperature
Ti : Coil inlet temperature
Ts : Set temperature
EXV : Indoor EXV opening
Indoor address
4

McQuay MDS 180B Specifications

General

Brand	McQuay
Model	MDS 180B
Category	Compressor
Language	English