Mitsubishi Electric PQHY-P200YLM-A Service Handbook page 149

[ VI Refrigerant Circuit ]
Part Symbols
name (functions)
Thermis- TH2
tor
TH3
(Pipe
temperature)
TH7
(Water inlet
temperature)
TH8
(Water outlet
temperature)
TH5
TH6
THINV
THHS
Inverter
heat sink tem-
perature
HWE15060
Notes Usage
PQHY LEV1 is controlled based on the
only TH2, TH3, and TH6 values
PQHY Controls defrosting during heat-
only ing operation
1) Frequency control
2) LEV1 is controlled according
to the amount of subcool at
the heat exchanger outlet,
which is calculated based on
the HPS data and TH3 val-
ue.
1) Detects water inlet tempera-
ture
2) Protects water heat ex-
changer from high and low
temperatures
3) Controls water heat ex-
changer
1) Detects water inlet tempera-
ture
2) Protects water heat ex-
changer from freezing up
Water heat exchanger is con-
trolled based on the 63LS and
TH5 values.
PQHY LEV1 is controlled based on the
only TH2, TH3, and TH6 values
Determines the LEV that controls
refrigerant flow on the component
cooler
Controls inverter cooling fan
based on THHS temperature
- 140 -
Specifications
Degrees Celsius
R = 15k
0
R = 3460
0/80
1 1
exp
R = 15
3460
t
273
0°C[32°F]: 15kohm
10°C[50°F]: 9.7kohm
20°C[68°F]: 6.4kohm
25°C[77°F]: 5.3kohm
30°C[86°F]: 4.3kohm
40°C[104°F]: 3.1kohm
Degrees Celsius
R = 17k
50
R = 4016
25/120
1 1
R = 17 exp
4016
t
323
0°C[32°F]: 161kohm
10°C[50°F]: 97kohm
20°C[68°F]: 60kohm
25°C[77°F]: 48kohm
30°C[86°F]: 39kohm
40°C[104°F]: 25kohm
Check method
Resistance
check
GB