Mitsubishi Electric PUHZ-SHW80VHA Service Manual page 62

( 5 ) O p eration data during emergenc y op eration
O p eration data
I ntake temp erature ( T H1 )
I ndoor p ip e temp erature ( T H2 )
I ndoor 2 - p h ase p ip e temp erature ( T H5 )
S et temp erature
P ressure saturation temp erature ( T
L iq uid temp erature ( T H3)
D isc h arge p ip e temp erature ( T H4 )
2 - p h ase p ip e temp erature ( T H6 )
A mb ient temp erature ( T H7 )
T emp erature differenc e c ode ( intake temp erature−set temp erature) ( T j )
D isc h arge sup erh eat ( S Hd)
S ub - c ool ( S C )
* 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 emegency operation with the values listed above.
* 2: If one thermistor is set to open/ short, the values for each will be different from the list above.
[Ex ample] When liq uid pipe temperature thermistor (TH3) has an open or short circuit.
T h ermistor
TH3
TH6
Regard normal figure as effective data.
TH4
Regard normal figure as effective data.
TH5
TH2
T
63HS
Regard normal figure as effective data.
OCH526C
)
6 3HS
HE A T
C O O L
5:
45:
Tb
Ta
Td
Tc
5: 50:
45:
5:
Tf
Te
O p eration mode
C O O L
HE A T
27 :
20.5:
5: 45:
5:
50:
25: 22:
50: 50:
45: 5:
80:
80:
50: 5:
7 :
35:
5
5
30: 30:
5: 5:
Discharge superheat (SHd)
Cooling = TH4 T = Tc Te
63HS
Heating = TH4 T = Td Tf
63HS
Degree of subcooling (SC)
Cooling = T H3 = Te 45
63HS
Heating = T TH2 = Tf 45
63HS
R emarks
—
—
—
—
(* 1)
(* 1)
(* 1)
(* 1)
(* 1)
—
(* 2)
(* 2)