Mitsubishi Electric SRK100VNPZJX, Technical Manual

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330
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'12 • PAC-T-174
2) SRK series
Remote controller Indoor unit display Outdoor control PCB Outdoor inventer PCB
Location of trouble Description of trouble Repair method
Reference
page
Error code Red LED RUN light
TIMER
light
Red LED Green LED Yellow LED
Keeps
flashing
Keeps
flashing
ON
ー ー
ー ー
ー ー
ー ー
ー ー
ー ー
ON
Keeps
flashing 1 time flash
1 time flash
Keeps
flashing
Installation or operating
condition
• Higher outdoor heat exchanger temperature Repair
434
435
436
437
438
439
440
443
444
447
448
449
450
445
・
446
451
・
452
441
・
442
Outdoor heat exchanger
temperature thermistor • Defective outdoor heat exchanger temperature thermistor
Replacement of
temperature thermistor
Outdoor control PCB *• Defective outdoor control PCB (Defective temperature thermistor input
circuit)?
Replacement of PCB
5 times
flash
2 times
flash
Keeps
flashing
Installation or operating
condition
• Higher discharge temperature Repair
temperature thermistor • Defective discharge pipe temperature thermistor
Replacement, repair of
temperature thermistor
Outdoor control PCB *• Discharge pipe Defective outdoor control PCB (Defective temperature thermistor input
circuit)?
Replacement of PCB
Keeps
flashing
4 times
flash
7 times
flash
Keeps
flashing
4 times
flash
7 times
flash
Keeps
flashing
Keeps
flashing
1 time flash
Keeps
flashing
Outdoor heat exchanger
temperature thermistor
• Defective outdoor heat exchanger temperature thermistor, broken wire or poor
connector connection
Replacement, repair of
temperature thermistor
Outdoor control PCB *• Defective outdoor control PCB (Defective temperature thermistor input
circuit)?
Replacement of PCB
1 time flash 1 time flash
Keeps
flashing
Outdoor air temperature
thermistor
• Defective Outdoor air temperature thermistor, broken wire or poor connector
connection
Replacement, repair of
temperature thermistor
Outdoor control PCB *• Defective outdoor control PCB (Defective temperature thermistor input
circuit)?
Replacement of PCB
1 time flash
Keeps
flashing
Discharge pipe
temperature thermistor
• Defective discharge pipe temperature thermistor, broken wire or poor
connector connection
Replacement, repair of
temperature thermistor
Outdoor control PCB *• Defective outdoor control PCB (Defective temperature thermistor input
circuit)?
Replacement of PCB
1 time flash
Keeps
flashing
Installation or operating
condition
• Rising high pressure (Operation of 63H1) • Service valve closing operation Repair
Outdoor control PCB *• Defective outdoor control PCB (Defective 63H input circuit)? Replacement of PCB
1 time flash
Keeps
flashing
6 times flash
Inverter PCB or radiator
fin
• Power transistor overheat
Replacement of PCB
or Repair
ON
ON
4 times
flash
ON
ON
1 time flash 1 time flash
Keeps
flashing
1 time flash
Outdoor control PCB
compressor
• Current cut (Anomalous compressor over-current) Replacement of PCB
Installation or operating
condition
• Service valve closing operation Repair
1 time flash
Keeps
flashing
Outdoor control PCB • Anomalous outdoor control PCB communication
Inverter PCB • Anomalous inverter PCB communication
Replacement of PCB
1 time flash
Keeps
flashing
Keeps
flashing
Outdoor fan motor • Anomalous outdoor fan motor Replacement, repair
Outdoor control PCB *• Defective outdoor control PCB (Defective motor input circuit)? Replacement of PCB
1 time flash
Keeps
flashing
Installation or operating
condition
• Low pressure error • Service valve closing operation Repair
Low pressure sensor • Anomalous low pressure, broken wire of low pressure sensor or poor
connector connection
Replacement, repair of
sensor
Outdoor control PCB *• Defective outdoor control PCB (Defective sensor input circuit)?
Replacement of control
PCB
1 time flash
Keeps
flashing
6 times flash Inverter PCB • Anomalous inverter PCB Replacement of PCB
1 time flash
Keeps
flashing
Keeps
flashing
Suction pipe
temperature thermistor
• Defective suction pipe temperature thermistor, broken wire or poor connector
connection
Replacement, repair of
temperature thermistor
Outdoor control PCB *• Defective outdoor PCB (Defective thermistor input circuit)?
Replacement of control
PCB
1 time flash
Keeps
flashing
Low pressure sensor • Defective low pressure sensor Replacement of sensor
Outdoor control PCB • Defective outdoor control PCB (Defective sensor input circuit)?
Replacement of control
PCB
1 time flash
Keeps
flashing
Operation status • Shortage in refrigerant quantity Repair
Installation status • Service valve closing operation
Service valve opening
check
5 times
flash
Keeps
flashing
Stays OFF
Compressor,
inverter PCB
•Anomalous compressor startup Replacement
Note (1) * mark in the Description of trouble means that, in ordinary diagnosis, it cannot identify the cause definitely, and, if the trouble is repaired by replacing the part, it
is judged consequently that the replaced part was defective.
(iii) Optional controller in-use
1) FDT, FDTC, FDEN, FDU, FDUM, FDF series
Indoor unit control PCB Outdoor unit control PCB
Description of trouble Repair method
Error code Red LED Red LED Green LED Red LED Green LED
Keeps flashing Stays OFF Keeps flashing Stays OFF Keeps flashing • Communication error (Defective communication circuit on the main unit of SC-SL2N-E or SC-SL3N-E) ete. Replacement
2) SRK series
Indoor unit display panel Outdoor unit control PCB
Description of trouble Repair method
Error code Red LED RUN light TIMER light Red LED Green LED
Keeps flashing
－ －
Stays OFF Keeps flashing • Communication error (Defective communication circuit on the main unit of SC-SL2N-E or SC-SL3N-E) ete. Replacement