Mitsubishi Electric MSZ-LN-VG Series Service Manual page 107

12-5. TROUBLE CRITERION OF MAIN PARTS
MXZ-2F33VF MXZ-2F42VF
MXZ-2F33VF2 MXZ-2F42VF2 MXZ-2F53VF2 MXZ-2F53VFH2
MXZ-2F33VF3 MXZ-2F42VF3 MXZ-2F53VF3 MXZ-2F53VFH3
MXZ-3F54VF MXZ-3F68VF
MXZ-3F54VF2 MXZ-3F68VF2 MXZ-4F72VF2 MXZ-4F80VF2
MXZ-3F54VF3 MXZ-3F68VF3 MXZ-4F72VF3 MXZ-4F80VF3
Part name
Defrost thermistor (RT61)
Fin temperature thermistor (RT64)
Ambient temperature thermistor (RT65)
Outdoor heat exchanger
temperature thermistor (RT68)
Discharge temperature thermistor
(RT62)
Compressor
W
RED
V
U
WHT
BLK
Outdoor fan motor
WHT
RED BLK
2 3
1
W
V
U
MXZ-2F33VF/42VF/53VF
MXZ-2F33VF2/42VF2/53VF2
MXZ-2F33VF3/42VF3/53VF3
MXZ-2F53VFH/MXZ-2F53VFH2
MXZ-2F53VFH3
Outdoor fan motor
MXZ-3F54VF/3F68VF/4F72VF
MXZ-3F54VF2/3F68VF2/4F72VF2/4F80VF2
MXZ-3F54VF3/3F68VF3/4F72VF3/4F80VF3
R.V. coil
OBH790D
MXZ-2F53VF MXZ-2F53VFH
MXZ-4F72VF
Measure the resistance with a tester.
Refer to 12-7. "TEST POINT DIAGRAM AND VOLTAGE" 1. "Inverter P.C. board", 2.
"Outdoor control P.C. board " or 3. "Outdoor power P.C. board" for the chart of thermis-
tor.
Measure the resistance with a tester.
Before measurement, hold the thermistor with your hands to warm it up.
Refer to 12-7. "TEST POINT DIAGRAM AND VOLTAGE" 1. "Inverter P.C. board", 2.
"Outdoor control P.C. board ", for the chart of thermistor.
Measure the resistance between terminals with a tester.
(Winding temperature : -10°C - 40°C)
MXZ-2F42VF
MXZ-2F42VF2
MXZ-2F33VF
MXZ-2F42VF3
MXZ-2F33VF2
MXZ-2F53VF
MXZ-2F33VF3
MXZ-2F53VF2
MXZ-2F53VF3
1.59 - 2.16
Measure the resistance between lead wires with a tester.
(Part temperature : -10°C - 40°C)
Normal (Each phase)
MXZ-2F33VF/42VF/53VF/53VFH
12 - 16
MXZ-2F33VF2/42VF2/53VF2/53VFH2
MXZ-2F33VF3/42VF3/53VF3/53VFH3
32 - 43
Refer to 12-6. .
Measure the resistance with a tester. (Part temperature : -10°C - 40°C)
MXZ-2F33VF MXZ-2F33VF2
MXZ-2F42VF MXZ-2F42VF2
MXZ-2F53VF MXZ-2F53VF2
MXZ-2F53VFH MXZ-2F53VFH2 MXZ-2F53VFH3
1.2 k - 1.56 k
107
Check method and criterion
Normal (Each phase)
MXZ-2F53VFH
MXZ-2F53VFH2
MXZ-2F53VFH3
MXZ-3F54VF
MXZ-3F54VF2
MXZ-3F54VF3
0.86 - 1.06
Normal
MXZ-2F33VF3 MXZ-3F54VF MXZ-3F54VF2
MXZ-2F42VF3 MXZ-3F68VF MXZ-3F68VF2
MXZ-2F53VF3 MXZ-4F72VF MXZ-4F72VF2
MXZ-3F68VF MXZ-4F80VF2
MXZ-3F68VF2 MXZ-4F80VF3
MXZ-3F68VF3
MXZ-4F72VF
MXZ-4F72VF2
MXZ-4F72VF3
0.91 - 1.13
MXZ-3F54VF3
MXZ-3F68VF3
MXZ-4F72VF3
MXZ-4F80VF2 MXZ-4F80VF3
1.26 k - 1.62 k