McQuay MDS 180B User Manual

38 Service Manual SM-MDS_(ii)
i) Outdoor Unit Monitoring
Items that can be monitor on an outdoor unit are as follow:
Item
Display
Identity
:
Type of model: Single / Master / Slave
Mode
:
Operating Mode: Cooling / Heating / Defrost
Edition
:
The program version of the outdoor
C
out
:
Outdoor Capacity (Unit: HP)
T
sh_out
Outdoor unit superheat (Unit: °C)
Comp1/DIG
:
Digital compressor output percentage (Unit: %)
Comp2/3/4/FIX
:
Fixed compressor status. ON / OFF
FAN1/FAN2
:
Outdoor fan status. STOP / LOW / HIGH
HS / LS
:
High pressure and low pressure reading (Unit: Bar, 1bar＝0.1MPa 1bar＝0.98kgf/cm
2
)
TH
:
Temperature sensor reading. (Unit: °C)
 TH1: Compressor discharge
 TH2: Outdoor #1 condenser coil inlet
 TH3: Outdoor #1 condenser coil midlet
 TH4: Outdoor #2 condenser coil inlet
 TH5: Outdoor #2 condenser coil midlet
 TH8: Outdoor ambient temperature
 TH9: Outdoor coil outlet temperature
 TH10: Sub-cool outlet temperature
 TH11: Sub-cool suction temperature
 TH12: Outdoor suction temperature
EXV1/2/3
:
Electronic Expansion Valve Opening Steps. Fully close during cooling & defrost cycle. Only
operate during heating cycle
EXV4
SV1/2
:
:
Sub-cool circuit Electronic Expansion Valve. Operate during cooling cycle. Fully close
during heating cycle
By-pass valve. For future provision
Remark: If the model does not have the respective sensor, it will display “――” after the parameter item.
4

McQuay MDS 180B Specifications

General

Brand	McQuay
Model	MDS 180B
Category	Compressor
Language	English