Mitsubishi SUZ-KA30NA - TROUBLE CRITERION OF MAIN PARTS

21
OCH688A
10-4. TROUBLE CRITERION OF MAIN PARTS
SUZ-KA18NA(H)2.TH SUZ-KA24NA(H)2.TH SUZ-KA30NA(H)2.TH SUZ-KA36NA(H)2.TH
Part name Check method and criterion Figure
Defrost thermistor (RT61)
Fin temperature
thermistor (RT64)
Ambient temperature
thermistor (RT65)
Outdoor heat exchanger
temperature thermistor
(RT68)
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.
Discharge temperature
thermistor (RT62)
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.
Compressor
Measure the resistance between terminals with a tester.
(Temperature: 14 to 104 °F (-10 to 40 °C))
1RUPDO
KA18 KA24/30/36
U-V
U-W
V-W
0.82 to 1.11 0.83 to 1.03
Outdoor fan motor
Measure the resistance between lead wires with a tester.
(Temperature: 14 ~ 104 °F (-10 ~ 40 °C))
Color of lead wire
1RUPDO
KA18 KA24/30/36
RD – BK
BK – WH
WH – RD
12 to 16 12 to 17
R. V. coil (21S4)
Measure the resistance with a tester.
(Temperature: 14 to 104 °F (-10 to 40°C))
1RUPDON
0.97 to 1.38
Expansion valve coil
(LEV)
Measure the resistance with a tester.
(Temperature: 14 ~ 104 °F (-10 ~ 40 °C))
Color of lead wire 1RUPDO
RD – OG
37 to 54
RD – WH
RD – BU
RD – YE
Defrost heater
(SUZ-KA·NAH2)
Measure the resistance using a tester.
[Temperature: 14 - 104°F (-10 - 40°C)]
1RUPDON
349 to 428
W
U
V
WH
RD BK
WH
RD BK
LEV
WH
RD
YE
OG
BU