Mitsubishi Electric Mr.Slim PUZ-HA42NKA Service Manual page 54

(5) Operation data during emergency operation
Operation data
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)
*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.
Thermistor
TH3
TH6
TH4
TH5
TH2
T
63HS
Discharge superheat (SHd)
Cooling = TH4 T
63HS
Heating = TH4 T
63HS
Degree of subcooling (SC)
Cooling = T TH3 = Te 113°F [45:]
63HS
Heating = T TH2 = Tf 113°F [45:]
63HS
OCH567
81°F [27:]
41°F [5:]
41°F [5:]
77°F [25:]
113°F [45:]
122°F [50:]
95°F [35:]
54°F [30:]
9°F [5:]
COOL
113°F [45:]
Ta
Regard normal figure as effective data.
Tc
Regard normal figure as effective data.
41°F [5:]
41°F [5:]
Te
Regard normal figure as effective data.
= Tc Te
= Tf
Operation mode
COOL
HEAT
69°F [20.5:]
113°F [45:]
122°F [50:]
72°F [22:]
41°F [5:]
41°F [5:]
45°F [7:]
5
5
54°F [30:]
9°F [5:]
HEAT
41°F [5:]
Tb
Td
122°F [50:]
113°F [45:]
Tf
Remarks
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