Mitsubishi SCM71ZJ-S1 User Manual

-
78
-
'11 • SCM-SM-110
(ii) Outdoor unit
(a) Model SCM40
,
45
,
50
,
60
,
71
,
80
Remote controller Indoor control PCB
Outdoor
main PCB
Location of trouble Description of trouble Repair method
Reference
page
Error code Red LED Red LED
Green
LED
Red LED
Keeps
flashing
Stays OFF
Keeps
flashing
2 times
flash
Installation, operation status • Higher outdoor heat exchanger temperature Repair
116
Outdoor heat exchanger
temperature sensor
• Defective outdoor heat exchanger temperature sensor
Replacement, repair
of temperature
sensor
Outdoor main PCB *• Defective outdoor main PCB (Defective temperature sensor input circuit)?
Replacement of
PCB
Stays OFF
Keeps
flashing
5 times
flash
Installation, operation status • Higher discharge temperature Repair
118
Discharge pipe temperature
sensor
• Defective discharge pipe temperature sensor
Replacement, repair
of temperature
sensor
Outdoor main PCB *• Defective outdoor main PCB (Defective temperature sensor input circuit)?
Replacement of
PCB
Stays OFF
Keeps
flashing
8 times
flash
Outdoor heat exchanger
temperature sensor
• Defective outdoor heat exchanger temperature sensor, broken wire or poor
connector connection
Replacement, repair
of temperature
sensor
119
Outdoor main PCB *• Defective outdoor main PCB (Defective temperature sensor input circuit)?
Replacement of
PCB
Stays OFF
Keeps
flashing
8 times
flash
Outdoor air temperature
sensor
• Defective outdoor air temperature sensor, broken wire or poor connector
connection
Replacement, repair
of temperature
sensor
120
Outdoor main PCB *• Defective outdoor main PCB (Defective temperature sensor input circuit)?
Replacement of
PCB
Stays OFF
Keeps
flashing
8 times
flash
Discharge pipe temperature
sensor
• Defective discharge pipe temperature sensor, broken wire or poor connector
connection
Replacement, repair
of temperature
sensor
121
Outdoor main PCB *• Defective outdoor main PCB (Defective temperature sensor input circuit)?
Replacement of
PCB
Stays OFF
Keeps
flashing
1 time
flash
Outdoor main PCB,
compressor
• Current cut (Anomalous compressor over-current)
Replacement of
PCB
124 • 125
Installation, operation status • Service valve closing operation Repair
Stay OFF
Keeps
flashing
4 times
flash
Outdoor main PCB • Anomalous outdoor main PCB commuication
Replacement of
PCB
126
Outdoor sub PCB • Anomalous outdoor sub PCB commuication
Stays OFF
Keeps
flashing
2 times
flash
Outdoor sub PCB • Defective active filter
Repair
PCB replacement
127
Stays OFF
Keeps
flashing
Keeps
flashing
Fan motor • Defective fan motor
Replacement 128
Outdoor main PCB • Defective outdoor main PCB
Stays OFF
Keeps
flashing
1 time
flash
Power transistor error
(outdoor main PCB)
• Power transistor error
Replacement of
PCB
129
Stays OFF
Keeps
flashing
8 times
flash
Outdoor suction pipe sensor
• Defective suction pipe temperature sensor, broken wire or poor connector
connection
Replacement, repair
of temperature
sensor
131
Outdoor sub PCB • Defective outdoor sub PCB (Defective temperature sensor input circuit)?
Replacement of
PCB
Stays OFF
Keeps
flashing
2 times
flash
Operation status • Shortage in refrigerant quantity Repair
133
Installation status • Service valve closing operation
Service valve
opening check
Stays OFF
Keeps
flashing
3 times
flash
• Overload operation
• Overcharge
• Compressor locking
• Current safe stop Replacement 134
Stays OFF
Keeps
flashing
2 times
flash
Compressor, outdoor main
PCB
• Anomalous compressor startup Replacement 135
Stays OFF
Keeps
flashing
7 times
flash
Compressor • Anomalous compressor rotor lock Replacement 136
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.

Mitsubishi SCM71ZJ-S1 Specifications

General

Brand	Mitsubishi
Model	SCM71ZJ-S1
Category	Air Conditioner
Language	English