Mitsubishi FDT100VNXWVH - Page 54

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53
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'20 • PAC-SM-351
(ii) Outdoor unit
FDC100-140VNX-W, 100-140VSX-W
Remote control Indoor unit control PCB Outdoor unit control PCB
Outdoor
inventer
PCB
Location of trouble Description of trouble Repair method
Reference
page
Error code Red LED Red LED
Green
LED (1)
Red LED
Green
LED (1)
Yellow
LED
Stays OFF
Keeps
flashing
1-time
flash
Keeps
flashing
Keeps
flashing
Installation or operating
condition
• Higher outdoor heat exchanger temperature Repair
110
Outdoor heat exchanger
temperature sensor
• Defective outdoor heat exchanger temperature sensor
Replacement of
temperature sensor
Outdoor unit control PCB
*• Defective outdoor unit control PCB (Defective temperature sensor
input circuit)?
Replacement of PCB
Stays OFF
Keeps
flashing
1-time
flash
Keeps
flashing
Installation or operating
condition
• Higher discharge temperature Repair
111
Discharge pipe
temperature sensor
• Defective discharge pipe temperature sensor
Replacement, repair of
temperature sensor
Outdoor unit control PCB
*• Defective outdoor unit control PCB (Defective temperature sensor
input circuit)?
Replacement of PCB
Stays OFF
Keeps
flashing
1-time
flash
Keeps
flashing
Outdoor heat exchanger
temperature sensor
• Defective outdoor heat exchanger temperature sensor, broken wire or poor
connector connection
Replacement, repair of
temperature sensor
112
Outdoor unit control PCB
*• Defective outdoor unit control PCB (Defective temperature sensor
input circuit)?
Replacement of PCB
Stays OFF
Keeps
flashing
1-time
flash
Keeps
flashing
Outdoor air temperature
sensor
• Defective Outdoor air temperature sensor, broken wire or poor connector
connection
Replacement, repair of
temperature sensor
113
Outdoor unit control PCB
*• Defective outdoor unit control PCB (Defective temperature sensor
input circuit)?
Replacement of PCB
Stays OFF
Keeps
flashing
1-time
flash
Keeps
flashing
Discharge pipe
temperature sensor
• Defective discharge pipe temperature sensor, broken wire or poor connector
connection
Replacement, repair of
temperature sensor
114
Outdoor unit control PCB
*• Defective outdoor unit control PCB (Defective temperature sensor
input circuit)?
Replacement of PCB
Stays OFF
Keeps
flashing
1-time
flash
Keeps
flashing
Installation or operating
condition
• Rising high pressure (Operation of 63H1) • Service valve closing operation Repair
115
Outdoor unit control PCB *• Defective outdoor unit control PCB (Defective 63H input circuit)? Replacement of PCB
Stays OFF
Keeps
flashing
1-time
flash
Keeps
flashing
6-time flash
Inverter PCB or radiator
fin
•
Power transistor overheat
Replacement of PCB
or Repair
116
Stays OFF
Keeps
flashing
1-time
flash
Keeps
flashing
1-time flash
Outdoor unit control
PCB compressor
• Current cut (Anomalous compressor over-current) Replacement of PCB
117 • 118
Installation or operating
condition
• Service valve closing operation Repair
Stays OFF
Keeps
flashing
1-time
flash
Keeps
flashing
Keeps
flashing
Outdoor unit control PCB • Anomalous outdoor unit control PCB communication
Replacement of PCB
119
Inverter PCB • Anomalous inverter PCB communication
Stays OFF
Keeps
flashing
1-time
flash
Keeps
flashing
Keeps
flashing
Outdoor fan motor • Anomalous outdoor fan motor Replacement, repair
120
Outdoor unit control PCB *• Defective outdoor unit control PCB (Defective motor input circuit)? Replacement of PCB
Stays OFF
Keeps
flashing
1-time
flash
Keeps
flashing
Installation or operating
condition
• Low pressure error • Service valve closing operation Repair
121 • 122
Low pressure sensor
• Anomalous low pressure, broken wire of low pressure sensor or poor
connector connection
Replacement, repair of
sensor
Outdoor unit control PCB *• Defective outdoor unit control PCB (Defective sensor input circuit)?
Replacement of control
PCB
Stays OFF
Keeps
flashing
1-time
flash
Keeps
flashing
6-time flash Inverter PCB • Anomalous inverter PCB Replacement of PCB
123
Stays OFF
Keeps
flashing
1-time
flash
Keeps
flashing
Keeps
flashing
Suction pipe
temperature sensor
• Defective suction pipe temperature sensor, broken wire or poor connector
connection
Replacement, repair of
temperature sensor
124
Outdoor unit control PCB *• Defective outdoor unit PCB (Defective sensor input circuit)?
Replacement of control
PCB
Stays OFF
Keeps
flashing
1-time
flash
Keeps
flashing
Low pressure sensor • Defective low pressure sensor Replacement of sensor
125
Outdoor unit control PCB • Defective outdoor unit control PCB (Defective sensor input circuit)?
Replacement of control
PCB
Stays OFF
Keeps
flashing
1-time
flash
Keeps
flashing
Operation status • Shortage in refrigerant quantity Repair
126
Installation status • Service valve closing operation
Service valve opening
check
Stays OFF
Keeps
flashing
5 time
flash
Keeps
flashing
Stays OFF
Compressor inverter
PCB
• Anomalous compressor startup Replacement
127 • 128
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.
1) FDT, FDTC, FDU, FDUM, FDE series