Mitsubishi Electric SUZ-KA09NA2 Service Manual page 18

10-4. TROUBLE CRITERION OF MAIN PARTS
SUZ-KA09NA(H)2.MX
Part name
Defrost thermistor (RT61)
Fin temperature
thermistor (RT64)
Ambient temperature ther-
mistor (RT65)
Outdoor heat exchanger
temperature thermistor
(RT68)
Discharge temperature
thermistor (RT62)
Compressor
Outdoor fan motor
R. V. coil (21S4)
Expansion valve coil (LEV)
Defrost heater
(SUZ-KA·NAH2)
OCH699A
SUZ-KA12NA(H)2.MX
Check method and criterion
Measure the resistance with a tester.
Refer to "Inverter P.C. board" in "10-6. TEST POINT DIAGRAM AND
VOLTAGE", for the chart of thermistor.
Measure the resistance with a tester. Before measurement, hold the
thermistor with your hands to warm it up.
Refer to "Inverter P.C. board" in "10-6. TEST POINT DIAGRAM AND
VOLTAGE", for the chart of thermistor.
Measure the resistance between terminals with a tester.
(Temperature: 14 - 104 °F (-10 - 40 °C))
Normal (Ω)
KA09
U-V
U-W 1.26 - 1.72 1.60 - 2.17
V-W
Measure the resistance between lead wires with a tester.
(Temperature: 14 ~ 104 °F (-10 ~ 40 °C))
Color of lead wire
RD – BK
BK – WH
WH – RD
Measure the resistance using a tester.
[Temperature: 14 - 104°F (-10 - 40°C)]
Normal (kΩ)
0.97 - 1.38
Measure the resistance using a tester.
[Temperature: 14 - 104°F (-10 - 40°C)]
Color of lead wire
RD – OG
RD – WH
RD – BU
RD – YE
Measure the resistance using a tester.
[Temperature: 14 - 104°F (-10 - 40°C)]
Normal (Ω)
349 - 428
SUZ-KA15NA(H)2.MX
KA12 KA15
0.82 - 1.11
Normal (Ω)
KA09/12/15
29 - 40
Normal (Ω)
37 - 54
18
Figure
WH RD BK
W
V
U
WH RD BK
W
V
U
WH
LEV
OG
RD
(+12V)