(5) Operation data during emergency operation
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Intake temperature (TH1)
Indoor fluid pipe temperature (TH2)
Indoor 2-phase pipe temperature (TH5)
Set temperature
Outdoor pipe temperature (TH3)
Outdoor 2-phase pipe temperature (TH6)
Outdoor air temperature (TH7)
Temperature difference code
(intake temperature - set temperature) (Tj)
Discharge superheat (SHd)
Sub-cool (SC)
Operation mode
COOL
81°F [27
:
]
41°F [5
:
]
41°F [5
:
]
77°F [25
:
]
113°F [45
:
]
122°F [50
:
]
95°F [35
:
]
5
54°F [30
:
]
9°F [5
:
]
HEAT
69°F [20.5
:
]
113°F [45
:
]
122°F [50
:
]
72°F [22
:
]
41°F [5
:
]
41°F [5
:
]
45°F [7
:
]
5
54°F [30
:
]
9°F [5
:
]
(*1)
(*1)
(*1)
(*1)
(*2)
Remarks
*1: If the thermistor temperature data is normal (not open/short), that data is loaded into the control as valid data.
If the unit enters emergency operation because TH values have become mismatched, setting the thermistors
to open/short corrects the settings.
*2: If one thermistor is set to open/short, the values for each will be different.
[Example] When pipe temperature thermistor (TH3) has an open or short circuit.
COOL
113°F [45
:
]
Ta
Tc
41°F [5
:
]
41°F [5
:
]
Te
HEAT
41°F [5
:
]
Tb
Td
122°F [50
:
]
113°F [45
:
]
Tf
Thermistor
TH3
TH6
TH4
TH5
TH2
T
63HS
Regard normal figure as effective data.
Regard normal figure as effective data.
Regard normal figure as effective data.
Discharge superheat (SHd)
Cooling = TH4
í
T
63HS
= Tc
í
Te
Heating = TH4
í
T
63HS
= Tf
Degree of subcooling (SC)
Cooling = T
63HS
í
TH3 = Te
í
113°F [45
:
]
Heating = T
63HS
í
TH2 = Tf
í
113°F [45
:
]
Operation data
OCH567
