Mitsubishi Heavy Industries V Multi FDC71VNX Technical Manual page 138

3) FDC200, 250VSA
Remote control Indoor control PCB
Green
Error code Red LED Red LED
LED (1)
Keeps
Stays OFF
flashing
Keeps
Stays OFF
flashing
Keeps
Stays OFF
flashing
Keeps
Stays OFF
flashing
Keeps
Stays OFF
flashing
Keeps
Stays OFF
flashing
Keeps
Stays OFF
flashing
Keeps
Stays OFF
flashing
Keeps
Stays OFF
flashing
Keeps
Stays OFF
flashing
Keeps
Stays OFF
flashing
Keeps
Stays OFF
flashing
Keeps
Stays OFF
flashing
Keeps
Stays OFF
flashing
Keeps
Stays OFF
flashing
Keeps
Stays OFF
flashing
Keeps
Stays OFF
flashing
Note (1) * m ark 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
Indoor unit control PCB
Error code Red LED Red LED Green LED
Keeps flashing Stays OFF Keeps flashing
Outdoor
Outdoor control PCB inventer
PCB
Location of trouble
Green
Yellow
Red LED
LED
LED (1)
Installation or operating
condition
1-time Keeps
Outdoor heat exchanger
flash flashing
temperature sensor
Outdoor control PCB
Installation or operating
condition
Discharge pipe
1-time Keeps
temperature sensor
flash flashing
Outdoor control PCB
Outdoor heat exchanger
Keeps
temperature sensor
1-time Keeps
flashing
flash flashing
Outdoor control PCB
Outdoor air temperature
sensor
1-time Keeps
flash flashing
Outdoor control PCB
Discharge pipe
temperature sensor
1-time Keeps
flash flashing
Outdoor control PCB
Installation or operating
1-time Keeps
condition
flash flashing
Outdoor control PCB
1-time Keeps 2-time or Inverter PCB or radiator
flash flashing 8-time flash fin
Outdoor control PCB
compressor
1-time Keeps 1-time or
flash flashing 9-time flash
Installation or operating
condition
Outdoor control PCB
1-time Keeps
flash flashing
Inverter PCB
Outdoor fan motor
1-time Keeps
flash flashing
Keeps Outdoor control PCB
flashing
Installation or operating
condition
1-time Keeps
Low pressure sensor
flash flashing
Outdoor control PCB
1-time Keeps 2-time or
Inverter PCB
flash flashing 8-time flash
Suction pipe
temperature sensor
1-time Keeps
flash flashing
Outdoor control PCB
Low pressure sensor
1-time Keeps
flash flashing
Outdoor control PCB
Keeps
flashing
Compressor under dome
temperature sensor
1-time Keeps
flash flashing
Outdoor control PCB
Operation status
1-time Keeps
flash flashing
Installation status
5-time Keeps Compressor inverter
4-time flash
flash flashing PCB
Outdoor unit control PCB
Red LED Green LED
Stays OFF Keeps flashing • Communication error (Defective communication circuit on the main unit of SC-SL2NA-E or SC-SL4-AE/BE) ete.
-
Description of trouble
• Higher outdoor heat exchanger temperature
• Defective outdoor heat exchanger temperature sensor
*• Defective outdoor control PCB (Defective temperature sensor input
circuit)?
• Higher discharge temperature
• Defective discharge pipe temperature sensor
*• Defective outdoor control PCB (Defective temperature sensor input
circuit)?
• Defective outdoor heat exchanger temperature sensor, broken wire or poor
connector connection
*• Defective outdoor control PCB (Defective temperature sensor input
circuit)?
• Defective outdoor air temperature sensor, broken wire or poor connector
connection
*• Defective outdoor control PCB (Defective temperature sensor input
circuit)?
• Defective discharge pipe temperature sensor, broken wire or poor connector
connection
*• Defective outdoor control PCB (Defective temperature sensor input
circuit)?
• Rising high pressure (Operation of 63H1) • Service valve closing operation
*• Defective outdoor control PCB (Defective 63H input circuit)?
• Power transistor overheat
• Current cut (Anomalous compressor over-current)
• Service valve closing operation
• Anomalous outdoor control PCB communication
• Anomalous inverter PCB communication
• Anomalous outdoor fan motor
*• Defective outdoor control PCB (Defective motor input circuit)?
• Low pressure error • Service valve closing operation
• Anomalous low pressure, broken wire of low pressure sensor or poor
connector connection
*• Defective outdoor control PCB (Defective sensor input circuit)?
• Anomalous inverter PCB
• Defective suction pipe temperature sensor, broken wire or poor connector
connection
*• Defective outdoor PCB (Defective sensor input circuit)?
• Defective low pressure sensor
• Defective outdoor control PCB (Defective sensor input circuit)?
• Defective compressor under dome temperature sensor (Model FDC250 only)
• Defective outdoor control PCB (Defective sensor input circuit)? (Model
FDC250 only)
• Shortage in refrigerant quantity
• Service valve closing operation
• Anomalous compressor startup
Description of trouble
137
-
'19 • PAC-T-327
Reference
Repair method
page
Repair
Replacement of
216
temperature sensor
Replacement of PCB
Repair
Replacement, repair of
217
temperature sensor
Replacement of PCB
Replacement, repair of
temperature sensor
218
Replacement of PCB
Replacement, repair of
temperature sensor
219
Replacement of PCB
Replacement, repair of
temperature sensor
220
Replacement of PCB
Repair
222
Replacement of PCB
Replacement of PCB
224
or Repair
Replacement of PCB
225 ・ 226
Repair
Service valve opening
check
227
Replacement of PCB
Replacement, repair
232
Replacement of PCB
Repair
Replacement, repair of
234 ・ 235
sensor
Replacement of control
PCB
Replacement of PCB 238
Replacement, repair of
temperature sensor
239
Replacement of control
PCB
Replacement of sensor
240
Replacement of control
PCB
Replacement of
temperature sensor
241
Replacement of control
PCB
Repair
243
Service valve opening
check
250 ・ 251
Replacement
Repair method
Replacement