Mitsubishi FDT125VNPWVH - Page 38

'22 • PAC-SM-412
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37
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(ii) Outdoor unit
Remote control Indoor unit control PCB
Location of trouble Description of trouble Repair method
Reference
page
Error code Red LED Red LED
Green
LED
Keeps
flashing
StaysOFF
Keeps
flashing
Installation, operation status •Higheroutdoorheatexchangertemperature Repair
81
Outdoorheatexchanger
temperature sensor
•Defectiveoutdoorheatexchangertemperaturesensor
Replacement, repair
of temperature
sensor
Outdoor unit PCB
*•DefectiveoutdoorunitPCB(Defectivetemperaturesensorinputcircuit)?
Replacement of
PCB
StaysOFF
Keeps
flashing
Installation, operation status •Higherdischargetemperature Repair
82
Dischargepipetemperature
sensor
•Defectivedischargepipetemperaturesensor
Replacement, repair
of temperature
sensor
Outdoor unit PCB
*•DefectiveoutdoorunitPCB(Defectivetemperaturesensorinputcircuit)?
Replacement of
PCB
StaysOFF
Keeps
flashing
Outdoorheatexchanger
temperature sensor
•Defectiveoutdoorheatexchangertemperaturesensor,brokenwireorpoor
connector connection
Replacement, repair
of temperature
sensor
83
Outdoor unit PCB *•DefectiveoutdoorunitPCB(Defectivetemperaturesensorinputcircuit)?
Replacement of
PCB
StaysOFF
Keeps
flashing
Outdoor air temperature sensor
•Defectiveoutdoorairtemperaturesensor,brokenwireorpoorconnector
connection
Replacement, repair
of temperature
sensor
84
Outdoor unit PCB *•DefectiveoutdoorunitPCB(Defectivetemperaturesensorinputcircuit)?
Replacement of
PCB
StaysOFF
Keeps
flashing
Dischargepipetemperature
sensor
•Defectivedischargepipetemperaturesensor,brokenwireorpoorconnector
connection
Replacement, repair
of temperature
sensor
85
Outdoor unit PCB *•DefectiveoutdoorunitPCB(Defectivetemperaturesensorinputcircuit)?
Replacement of
PCB
StaysOFF
Keeps
flashing
Installation, operation status •Servicevalve(gasside)closingoperation Replacement 86
StaysOFF
Keeps
flashing
Outdoor unit PCB, compressor •Currentcut(Anomalouscompressorover-current)
Replacement of
PCB
87･88
Installation, operation status •Servicevalveclosingoperation Repair
StaysOFF
Keeps
flashing
Outdoor unit PCB
•Overvoltage
Repair
PCB replacement
89
•Defectiveactivefilter
StaysOFF
Keeps
flashing
Fanmotor •Defectivefanmotor
Replacement 90
Outdoor unit PCB •DefectiveoutdoorunitPCB
StaysOFF
Keeps
flashing
Power transistor error
(Outdoor unit PCB)
• Power transistor error
Replacement of
PCB
91
StaysOFF
Keeps
flashing
Operation status •Shortageinrefrigerantquantity Repair
92
Installation status •Servicevalveclosingoperation
Servicevalve
openingcheck
StaysOFF
Keeps
flashing
•Overloadoperation
•Overcharge
•Compressorlocking
• Current safe stop Replacement 93
StaysOFF
Keeps
flashing
Compressor, outdoor unit PCB
•Anomalouscompressorstartup
•Voltagedrop
Replacement 94
StaysOFF
Keeps
flashing
Compressor •Anomalouscompressorrotorlock Replacement 95
Note(1) *markinthedescriptionoftroublemeansthat,inordinarydiagnosis,itcannotidentifythecausedenitely,and,ifthetroubleisrepairedbyreplacingthe
part,itisjudgedconsequentlythatthereplacedpartwasdefective.