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Mitsubishi Electric PURY-HP72 Service Handbook page 81

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[3-3 Functions of the Major Components of Outdoor Unit ]
Part
Symbols
name
(functions)
Thermis-
TH7
tor
(Outdoor tem-
perature)
TH5
TH6
TH9
(Pipe
temperature)
TH11
(Pipe
temperature)
THHS
Inverter
heat sink tem-
perature
THBOX
Control box
internal tem-
perature de-
tection
Solenoid
SV1a
valve
Discharge-
suction
bypass
SV4a - SV4d
Heat
exchanger
capacity con-
trol
SV5b
Heat
exchanger
capacity con-
trol
SV9
SV10
SV11
LEV
LEV4
LEV5a
HWE13080
Notes
Usage
1) Detects outdoor air tempera-
ture
2) Controls fan operation
Fan operated on the 63LS and
TH5 values.
Controls defrosting during heating
operation
Controls inverter cooling fan
based on THHS temperature
1) High/low pressure bypass at
start-up and stopping, and
capacity control during low-
load operation
2) High-pressure-rise preven-
tion
Controls outdoor unit heat ex-
changer capacity
Prevents high-pressure-rise
Controls defrost cycle
High-pressure-rise prevention
ON-defrost control
Injection amount control
Evaporating temperature control
Specifications
Degrees Celsius
R
= 15k
0
R
= 3460
0/80
R = 15
exp
3460
t
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
R = 17
exp
4016
t
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
AC208 - 230V
Open while being powered/
closed while not being pow-
ered
AC208 - 230V
Closed while being powered/
open while not being pow-
ered
AC208 - 230V
Open while being powered/
closed while not being pow-
ered
AC208 - 230V
Open while being powered/
closed while not being pow-
ered
DC12V
Opening of stepping motor
driving valve 0-3000 pulses
- 70 -
Check method
Resistance check
1
1
273
1
1
323
Continuity check
with a tester
Refer to the section
"Continuity Test
with a Tester".
Continuity between
white and orange.
Continuity between
yellow, brown, and
blue.
White
M
Orange
Yellow
Brown Blue
GB

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