Samsung MH020FPEA Service Manual page 185

12-5 Fault Diagnosis of Major Parts
Preparation : multimeter (AC voltage, DC voltage, Resistance)
Part
Indoor
Temperature sensor
Heat exchanger in/out sensor
Outdoor
Temperature sensor
Condenser temperature sensor
Outdoor
Discharge temperature sensor
OLP temperature sensor
Indoor Fan Motor
Outdoor Fan Motor
Outdoor unit EEV
Stepping motor
12-12 12-12
Measure the resistance between terminals of the sensor connector housing.
In case of outdoor unit sensor, "view mode" is used for checking sensor temperature.
In case of Indoor temperature sensor, temperature is displayed on the display unit in
"Fan Mode" operation.
Normal
Ambient temperature
Resistance of sensor[KΩ]
∞, 0Ω...open or short
Abnormal
Measure the resistance between terminals of the sensor connector housing.
In case of outdoor unit sensor, "view mode" is used for checking sensor temperature.
Normal
Ambient temperature
Resistance of sensor[KΩ]
∞, 0Ω...open or short
Abnormal
Measure the resistance between terminals of the Motor connector housing
Normal At the normal temperature (10˚C - 30˚C)
Terminals(wire color)
Yellow-Blue
Yellow-Red
*MH020FPEA /MH023FPEA/MH026FPEA/MH✳✳✳✳✳-07/MH✳✳✳✳✳-09
Terminal(wire color)
Yellow-Blue
Red-Yellow
∞, 0Ω...open or short
Abnormal
Measure the resistance between terminals of the Motor connector housing
Normal
Terminals(wire color)
Red-Blue
Yellow-Blue
Blue-White(run capa line)
Red-White Blue(run capa line)
∞, 0Ω...open or short
Abnormal
Measure the resistance between terminals of the Motor connector housing
Normal 40-50Ω Orange-Gray, Red-Gray, Yellow-Gray, Black-Gray
∞, 0Ω...open or short
Abnormal
Diagnosis
15˚C 20˚C 25˚C 30˚C
14.7 12.1 10
0˚C 10˚C 20˚C 30˚C
553 362 242
Resistance[Ω]
MH035FPEA MH052FPEA
*MH✳✳✳✳✳✳✳ MH✳✳✳✳✳-12 MH052FPEA1
250~280 250~280 120~150
420~480 330~370 120~150
Model Bender
SHIBAURA
MH023/026/035FWEA
SINYA
MH✳✳VW2-✳✳
DAEYANG
SUNGSHIN
MH052FWEA
DAEYANG
SHIBAURA
MH023/026/035FWEA
SINYA
MH✳✳VW2-✳✳
DAEYANG
SUNGSHIN
MH052FWEA
DAEYANG
Resistance[Ω]
95~105
95~105
60~75
0~1
25˚C 40˚C
8.3 6.9 5.8
40˚C 50˚C
166 165 82
Remark
Main
Sub
Resistance(Ω) Remark
356~435
531~650
312~381 Main
130~159
211.5~258.5
324.9~397
320~391
252~308 Sub
106.2~130
164.7~201.3
Remark
Main 1
Main 2
Sub
Thermal fuse
Samsung Electronics