Mitsubishi Heavy Industries SRK100VNXWZRF Service Manual page 30

(ii) Outdoor unit
1) FDC100VNX-W,100VSX-W
FCD100VNA-W,100VSA-W
Remote control Indoor unit display
TIMER
Error code Red LED RUN light
light
Keeps
ON
flashing
5-time
ON
flash
Keeps 2-time
flashing flash
Keeps
1-time flash
flashing
Keeps 4-time
flashing flash
— —
— —
Keeps
flashing
ON 1-time flash
— —
5-time
ON
flash
7-time
ON
flash
— —
4-time
ON
flash
— —
— —
7-time
ON
flash
— —
— —
Note * 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.
Outdoor unit control PCB Outdoor inventer PCB
Red LED Green LED Yellow LED
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
1-time flash 6-time flash
flashing
Keeps
1-time flash
1-time flash
flashing
Keeps
1-time flash
flashing
Keeps
1 time flash
flashing
Keeps
Keeps
1-time flash
flashing
flashing
Keeps
1-time flash
flashing
Keeps
1-time flash 6-time flash
flashing
Keeps
1-time flash
flashing
Keeps
Keeps
1-time flash
flashing
flashing
Keeps
1-time flash
flashing
Keeps
1-time flash —
flashing
Keeps
5-time flash Stays OFF
flashing
Location of trouble
Installation or operating
• Higher outdoor heat exchanger temperature
condition
Outdoor heat exchanger
• Defective outdoor heat exchanger temperature sensor
temperature thermistor
*• Defective outdoor unit control PCB (Defective temperature sensor input
Outdoor unit control PCB
circuit)?
Installation or operating
• Higher discharge temperature
condition
temperature sensor
• Defective discharge pipe temperature sensor
Outdoor unit control PCB *• Defective outdoor unit control PCB (Defective temperature sensor input circuit)?
Outdoor heat exchanger • Defective outdoor heat exchanger temperature sensor, broken wire or poor
temperature thermistor connector connection
*• Defective outdoor unit control PCB (Defective temperature sensor input
Outdoor unit control PCB
circuit)?
Outdoor air temperature • Defective outdoor air temperature sensor broken wire or poor connector
thermistor connection
*• Defective outdoor unit control PCB (Defective temperature sensor input
Outdoor unit control PCB
circuit)?
Discharge pipe • Defective discharge pipe temperature sensor broken wire or poor connector
temperature sensor connection
*• Defective outdoor unit control PCB (Defective temperature sensor input
Outdoor unit control PCB
circuit)?
Installation or operating
• Rising high pressure (Operation of 63H1) • Service valve closing operation
condition
Outdoor unit control PCB *• Defective outdoor unit control PCB (Defective 63H input circuit)?
Inverter PCB or radiator
• Power transistor overheat
fin
Outdoor unit control
• Current cut (Anomalous compressor over-current)
PCB compressor
Installation or operating
• Service valve closing operation
condition
Outdoor unit control PCB • Anomalous outdoor unit control PCB communication
Inverter PCB • Anomalous inverter PCB communication
Outdoor unit control PCB • Defective outdoor unit control PCB
• Defective
Outdoor fan motor • Anomalous outdoor fan motor
Outdoor unit control PCB *• Defective outdoor unit control PCB (Defective motor input circuit)?
Installation or operating
• Low pressure error • Service valve closing operation
condition
• Anomalous low pressure, broken wire of low pressure sensor or poor
Low pressure sensor
connector connection
Outdoor unit control PCB *• Defective outdoor unit control PCB (Defective sensor input circuit)?
Inverter PCB • Anomalous inverter PCB
Suction pipe • Defective suction pipe temperature sensor, broken wire or poor connector
temperature sensor connection
Outdoor unit control PCB *• Defective outdoor unit PCB (Defective sensor input circuit)?
Low pressure sensor • Defective low pressure sensor
Outdoor unit control PCB • Defective outdoor unit control PCB (Defective sensor input circuit)?
Operation status • Shortage in refrigerant quantity
Installation status • Service valve closing operation
• Anomalous compressor by loss of synchronism
Compressor PCB
(FDC100VNA-W / VSA-W only)
Compressor,
•Anomalous compressor startup
inverter PCB
29
- -
'22 • PAC-SM-422
Description of trouble
Reference
Repair method
page
Repair
Replacement of
102
temperature thermistor
Replacement of PCB
Repair
Replacement, repair of
104
temperature thermistor
Replacement of PCB
Replacement, repair of
temperature thermistor
106
Replacement of PCB
Replacement, repair of
temperature thermistor
107
Replacement of PCB
Replacement, repair of
temperature thermistor
108
Replacement of PCB
Repair
109
Replacement of PCB
Replacement of PCB
112
or Repair
Replacement of PCB
114・115
Repair
Replacement of PCB 120
Replacement of PCB 122
Replacement, repair
124・125
Replacement of PCB
Repair
Replacement, repair of
127・128
sensor
Replacement of control
PCB
Replacement of PCB 129
Replacement, repair of
temperature thermistor
132
Replacement of control
PCB
Replacement of sensor
133
Replacement of control
PCB
Repair
135
Service valve opening
check
Replacement 137
Replacement 139-142