Mitsubishi Electric e Series Service Handbook page 89

[ VI Refrigerant Circuit ]
Part Symbols
name (functions)
Thermi TH7,8
stor (ACC inlet Ref
temperature)
TH3,4
(Air HEX Ref
temperature)
TH5,6
(Water HEX
Ref tempera-
ture)
TH9
(Outdoor tem-
perature)
TH10,11,12
THHS
Inverter
heat sink tem-
perature
4-way MV
valve (EAHV only)
Fan FAN motor
motor
Linear LEV
expan- (Main)
sion
valve
LEV
(Injection)
HWE20010
Notes Usage
1) Detects suction tempera-
ture
2) Provide low pressure pro-
tection
Controls SC during cooling op-
eration
Controls SC during heating op-
eration
1) Detects outdoor air tem-
perature
2) Controls fan and com-
pressor operation
1) Detects water tempera-
ture
2) Controls water tempera-
ture
Provide the inverter circuit pro-
tection
Changeover between heating
and cooling or defrost
Adjusts the operating frequen-
cy of the propeller fan based
on the condensation or evapo-
ration temperature
Adjusts refrigerant flow during
heating
Adjusts refrigerant flow during
heating
Specifications
Degrees Celsius
R = 15k
0
R = 3385
0/80
R = 15 exp
3385
t
0°C[32°F] :15kohm
10°C[50°F] :9.7kohm
20°C[68°F] :6.5kohm
25°C[77°F] :5.3kohm
30°C[86°F] :4.4kohm
40°C[104°F] :3.0kohm
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
AC220 - 240V
OFF: cooling or defrost cy-
cle
ON: heating cycle
DC400V 92W
DC12V
Opening of a valve driven
by a stepping motor (2000
pulses).
DC12V
Opening of a valve driven
by a stepping motor (480
pulses).
- 80 -
Check method
Resistance check
1 1
273
1 1
323
Continuity check with a
tester
Continuity check with a
tester
Continuity between
white, red, and orange.
Continuity between yel-
low and blue.
White
Red
Orange
Yellow
Continuity check with a
tester
Continuity between
white, red, and orange.
Continuity between yel-
low and blue.
White
Red
Orange
Yellow
M
Blue
M
Blue
GB