Service manual
38 Service Manual SM-MDS_(i)
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 return air 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