Mitsubishi Heavy Industries SRK100VNXPZSX Technical Manual page 86

(ii) Outdoor unit
Remote control Indoor unit display
FDC100-140VNX, 100-140VSX
TIMER
Error code Red LED RUN light
light
FDC100-140VN, 100-140VS
Remote control Indoor unit display
Keeps
ON
flashing
TIMER
Error code Red LED RUN light
light
5-time
ON
Keeps
flash
ON
flashing
Keeps 2-time
flashing flash
5-time
ON
flash
Keeps
1-time flash
flashing
Keeps 2-time
flashing flash
Keeps 4-time
flashing flash
Keeps
1-time flash
flashing
— —
Keeps 4-time
— —
flashing flash
Keeps
flashing
— —
ON 1-time flash
— —
— —
Keeps
flashing
7-time
ON 1-time flash
ON
flash
— —
— —
7-time
ON
flash
4-time
ON
flash
— —
Keeps 5-time
flashing flash
4-time
ON
— —
flash
Keeps 5-time
7-time
flashing flash ON
flash
— —
— —
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. 7-time
ON
flash
— —
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) Option control in-use
SRK series
Indoor unit display panel
Error code Red LED RUN light
Keeps flashing －
Indoor unit display panel
Error code Red LED RUN light
Keeps flashing
－
Outdoor control PCB Outdoor inventer PCB
Red LED Green LED Yellow LED
Outdoor control PCB Outdoor inventer PCB
Keeps
1-time flash
flashing
Red LED Green LED Yellow LED
Keeps
1-time flash
Keeps
flashing
1-time flash
flashing
Keeps
Keeps
flashing
1-time flash
flashing
Keeps
1-time flash
flashing
Keeps
1-time flash
flashing
Keeps
Keeps
flashing
1-time flash
flashing
Keeps
1-time flash
flashing
Keeps
1-time flash
flashing
Keeps
1-time flash
flashing
Keeps
Keeps
1-time flash
1-time flash 6-time flash
flashing
flashing
Keeps Keeps
1-time flash
1-time flash
1-time flash
flashing
flashing
Keeps
1-time flash 6-time flash
Keeps
flashing
1-time flash
flashing
Keeps
Keeps
1-time flash
1-time flash
1-time flash
flashing
flashing
Keeps
flashing
Keeps
1-time flash
flashing
Keeps
1-time flash
flashing
Keeps
1-time flash
flashing
Keeps
flashing
Keeps
1-time flash 6-time flash
flashing
Keeps
1-time flash
flashing
Keeps
1-time flash
flashing
Keeps
Keeps
1-time flash 6-time flash
Keeps
flashing
1-time flash
flashing
flashing
Keeps
1-time flash Keeps
flashing
1-time flash
flashing
Keeps
Keeps
Keeps
5-time flash Stays OFF
1-time flash
flashing
flashing
flashing
Keeps
1-time flash
flashing
Keeps
5-time flash Stays OFF
flashing
Outdoor unit control PCB
TIMER light Red LED Green LED
－ Stays OFF Keeps flashing
Outdoor unit control PCB
TIMER light Red LED Green LED
Stays OFF Keeps flashing
－
Location of trouble
Installation or operating
• Higher outdoor heat exchanger temperature
condition
Outdoor heat exchanger
• Defective outdoor heat exchanger temperature thermistor
temperature thermistor
Location of trouble
*• Defective outdoor control PCB (Defective temperature thermistor input
Outdoor control PCB
circuit)?
Installation or operating
• Higher discharge temperature
Installation or operating
condition
• Higher outdoor heat exchanger temperature
condition
temperature sensor
• Defective discharge pipe temperature thermistor
Outdoor heat exchanger
• Defective outdoor heat exchanger temperature thermistor
temperature thermistor
*• Discharge pipe Defective outdoor control PCB (Defective temperature thermistor
Outdoor control PCB
*• Defective outdoor control PCB (Defective temperature thermistor input
input circuit)?
Outdoor control PCB
circuit)?
Outdoor heat exchanger • Defective outdoor heat exchanger temperature thermistor, broken wire or poor
Installation or operating
temperature thermistor connector connection
• Higher discharge temperature
condition
*• Defective outdoor control PCB (Defective temperature thermistor input
Outdoor control PCB
circuit)?
temperature sensor
• Defective discharge pipe temperature thermistor
Outdoor air temperature • Defective Outdoor air temperature thermistor, broken wire or poor connector
*• Discharge pipe Defective outdoor control PCB (Defective temperature thermistor
thermistor connection
Outdoor control PCB
input circuit)?
*• Defective outdoor control PCB (Defective temperature thermistor input
Outdoor control PCB
Outdoor heat exchanger • Defective outdoor heat exchanger temperature thermistor, broken wire or poor
circuit)?
temperature thermistor connector connection
Discharge pipe • Defective discharge pipe temperature thermistor, broken wire or poor
*• Defective outdoor control PCB (Defective temperature thermistor input
temperature thermistor connector connection
Outdoor control PCB
circuit)?
*• Defective outdoor control PCB (Defective temperature thermistor input
Outdoor control PCB
Outdoor air temperature • Defective Outdoor air temperature thermistor, broken wire or poor connector
circuit)?
thermistor connection
Installation or operating
• Rising high pressure (Operation of 63H1) • Service valve closing operation
*• Defective outdoor control PCB (Defective temperature thermistor input
condition
Outdoor control PCB
circuit)?
Outdoor control PCB *• Defective outdoor control PCB (Defective 63H input circuit)?
Discharge pipe • Defective discharge pipe temperature thermistor, broken wire or poor
temperature thermistor connector connection
Inverter PCB or radiator
• Power transistor overheat
*• Defective outdoor control PCB (Defective temperature thermistor input
fin
Outdoor control PCB
circuit)?
Outdoor control PCB
Installation or operating
• Current cut (Anomalous compressor over-current)
• Rising high pressure (Operation of 63H1) • Service valve closing operation
compressor
condition
Installation or operating
Outdoor control PCB *• Defective outdoor control PCB (Defective 63H input circuit)? • Service valve closing operation
condition
Inverter PCB or radiator
Outdoor control PCB • Anomalous outdoor control PCB communication
• Power transistor overheat
fin
Inverter PCB • Anomalous inverter PCB communication
Outdoor control PCB
• Current cut (Anomalous compressor over-current)
compressor
Outdoor fan motor • Anomalous outdoor fan motor
Installation or operating
Outdoor control PCB • Service valve closing operation *• Defective outdoor control PCB (Defective motor input circuit)?
condition
Installation or operating
• Low pressure error • Service valve closing operation
Outdoor control PCB • Anomalous outdoor control PCB communication
condition
• Anomalous low pressure, broken wire of low pressure sensor or poor
Low pressure sensor
Inverter PCB • Anomalous inverter PCB communication
connector connection
Outdoor fan motor • Anomalous outdoor fan motor
Outdoor control PCB *• Defective outdoor control PCB (Defective sensor input circuit)?
Outdoor control PCB *• Defective outdoor control PCB (Defective motor input circuit)?
Installation or operating
Inverter PCB • Anomalous inverter PCB
• Low pressure error • Service valve closing operation
condition
• Anomalous low pressure, broken wire of low pressure sensor or poor
Suction pipe • Defective suction pipe temperature thermistor, broken wire or poor connector
Low pressure sensor
connector connection
temperature thermistor connection
Outdoor control PCB *• Defective outdoor control PCB (Defective sensor input circuit)?
Outdoor control PCB *• Defective outdoor PCB (Defective thermistor input circuit)?
Low pressure sensor • Defective low pressure sensor
Inverter PCB • Anomalous inverter PCB
Outdoor control PCB • Defective outdoor control PCB (Defective sensor input circuit)?
Suction pipe • Defective suction pipe temperature thermistor, broken wire or poor connector
temperature thermistor connection
Operation status • Shortage in refrigerant quantity
Outdoor control PCB *• Defective outdoor PCB (Defective thermistor input circuit)?
Installation status • Service valve closing operation
Low pressure sensor • Defective low pressure sensor
Compressor,
•Anomalous compressor startup
inverter PCB
Outdoor control PCB • Defective outdoor control PCB (Defective sensor input circuit)?
Operation status • Shortage in refrigerant quantity
Installation status • Service valve closing operation
Compressor,
•Anomalous compressor startup
inverter PCB
Description of trouble
• Communication error (Defective communication circuit on the main unit of SC-SL2N-E or SC-SL4) ete.
Description of trouble
• Communication error (Defective communication circuit on the main unit of SC-SL2N-E or SC-SL4) ete.
85
- -
'17 • PAC-T-257
Description of trouble
Description of trouble
Reference
Repair method
page
Repair
Replacement of
133
Reference
temperature thermistor
Repair method
page
Replacement of PCB
Repair
Repair
Replacement, repair of
134
Replacement of
temperature thermistor
133
temperature thermistor
Replacement of PCB
Replacement of PCB
Replacement, repair of
temperature thermistor
Repair
135
Replacement of PCB
Replacement, repair of
134
temperature thermistor
Replacement, repair of
temperature thermistor
Replacement of PCB
136
Replacement of PCB
Replacement, repair of
temperature thermistor
135
Replacement, repair of
temperature thermistor
Replacement of PCB
137
Replacement of PCB
Replacement, repair of
temperature thermistor
136
Repair
Replacement of PCB
138
Replacement of PCB
Replacement, repair of
temperature thermistor
Replacement of PCB
137
139
or Repair
Replacement of PCB
Replacement of PCB
Repair
140・141
138
Replacement of PCB Repair
Replacement of PCB
139
or Repair
Replacement of PCB 142
Replacement of PCB
Replacement, repair
140・141
143
Replacement of PCB Repair
Repair
Replacement of PCB 142
Replacement, repair of
144 ・145
sensor
Replacement, repair
Replacement of control
143
PCB
Replacement of PCB
Replacement of PCB 146
Repair
Replacement, repair of
Replacement, repair of
144 ・145
sensor
temperature thermistor
147
Replacement of control
Replacement of control
PCB
PCB
Replacement of sensor
Replacement of PCB 146
148
Replacement of control
PCB
Replacement, repair of
temperature thermistor
Repair
147
149
Replacement of control
Service valve opening
PCB
check
Replacement of sensor
Replacement 150・151
148
Replacement of control
PCB
Repair
149
Service valve opening
check
Replacement 150・151
Repair method
Replacement
Repair method
Replacement