38 Service Manual SM-MDS_(ii)
i) Outdoor Unit Monitoring
Items that can be monitor on an outdoor unit are as follow:
Type of model: Single / Master / Slave
Operating Mode: Cooling / Heating / Defrost
The program version of the outdoor
Outdoor Capacity (Unit: HP)
Outdoor unit superheat (Unit: °C)
Digital compressor output percentage (Unit: %)
Fixed compressor status. ON / OFF
Outdoor fan status. STOP / LOW / HIGH
High pressure and low pressure reading (Unit: Bar, 1bar=0.1MPa 1bar=0.98kgf/cm
2
)
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
Electronic Expansion Valve Opening Steps. Fully close during cooling & defrost cycle. Only
operate during heating cycle
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.