Mitsubishi Electric PUZ-HA30NHA5, Руководство по обслуживанию

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54
(5) Operation data during emergency operation
During emergency operation, no communication is performed with the indoor unit, so the data items needed for operation
are set to the following values:
Intake temperature (TH1)
Indoor liquid temperature (TH2)
Indoor 2-phase pipe temperature (TH5)
Set temperature
Outdoor liquid temperature (TH3)
Outdoor 2-phase pipe temperature (TH6)
Outdoor ambient 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
:
]
HEAT
41°F [5
:
]
Tb
Td
122°F [50
:
]
122°F [50
:
]
Thermistor
TH3
TH6
TH4
TH5
TH2
Regard normal figure as effective data.
Regard normal figure as effective data.
Discharge superheat (SHd)
Cooling = TH4 − TH6 = Tc − Ta
Heating = TH4 − TH5 = Td − (122°F [50
:
])
Degree of subcooling (SC)
Cooling = TH6 − TH3 = Ta − (113°F[45
:
])
Heating = TH5 − TH2 = 122°F − 113°F = 9°F
[50
:
− 45
:
= 5
:
]
Operation data
OCH607