Mitsubishi Electric PUHZ-FRP71VHA Service Manual page 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:
Operation data
Intake temperature (TH1)
Indoor pipe temperature (TH2)
Indoor 2-phase pipe temperature (TH5)
Set temperature
Outdoor pipe temperature (TH3)
Outdoor 2-phase pipe temperature (TH6)
Outdoor ambient temperature (TH7)
Pressure sensor saturated temperature (63HS)
Temperature difference code
(room temperature - set temperature) (∆Tj)
*1 If the thermistor temperature data is normal (not open/short), that data is loaded into the control as valid data.
When the unit enters emergency operation and TH values are mismatched, set the thermistors to open/short.
And the unit runs emergency operation with the values listed above.
OCH544
Operation mode
COOL
HEAT
27 20.5
5 45
5 50
25
22
45 5
50
5
35 7
50
50
5 5
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Remarks
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(*1)
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(*1)
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