Trouble Criterion Of Main Parts - Mitsubishi SUZ-KA18NA2 Service Manual

10-4. TROUBLE CRITERION OF MAIN PARTS

SUZ-KA18NA(H)2.TH SUZ-KA24NA(H)2.TH
Part name
Defrost thermistor (RT61)
Measure the resistance with a tester.
Fin temperature
Refer to "Inverter P.C. board" in "10-6. TEST POINT DIAGRAM AND
thermistor (RT64)
VOLTAGE", for the chart of thermistor.
Ambient temperature
thermistor (RT65)
Outdoor heat exchanger
temperature thermistor
(RT68)
Measure the resistance with a tester. Before measurement, hold the
thermistor with your hands to warm it up.
Discharge temperature
thermistor (RT62)
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 to 104 °F (-10 to 40 °C))
Compressor
Measure the resistance between lead wires with a tester.
(Temperature: 14 ~ 104 °F (-10 ~ 40 °C))
Outdoor fan motor
Measure the resistance with a tester.
(Temperature: 14 to 104 °F (-10 to 40°C))
R. V. coil (21S4)
Measure the resistance with a tester.
(Temperature: 14 ~ 104 °F (-10 ~ 40 °C))
Expansion valve coil
(LEV)
Defrost heater
(SUZ-KA·NAH2)
OCH688A
Check method and criterion
KA18
U-V
U-W 0.82 to 1.11
V-W
Color of lead wire
KA18
RD – BK
BK – WH 12 to 16
WH – RD
0.97 to 1.38
Color of lead wire
RD – OG
RD – WH
37 to 54
RD – BU
RD – YE
Measure the resistance using a tester.
[Temperature: 14 - 104°F (-10 - 40°C)]
349 to 428
SUZ-KA30NA(H)2.TH SUZ-KA36NA(H)2.TH
KA24/30/36
0.83 to 1.03
KA24/30/36
12 to 17
21
Figure
WH RD BK
W
V
U
WH
RD BK
WH
LEV
OG
RD
YE BU