Mitsubishi Heavy Industries SCM71ZS-W User Manual

-
147
-
'19 • SCM-SM-276
Error code
Remote control:
LED Green Red
Indoor
Outdoor
Content
E45
Outdoor unit sub PCB
communication error
Keeps ashing
Stays OFF
– 4
-
time ash
1. Applicable model
5. Troubleshooting
All models
Diagnosis Countermeasure
YES
Replace the outdoor unit main PCB.
NO
YES
YES
Is the connector
connection between the outdoor unit
main PCB and the outdoor sub
PCB OK?
Is the power source voltage OK?
Is the
communication wire
between the main PCB and the outdoor unit sub
PCB connected properly?
Is normal state restored?
YES
NO
NO
NO
Correct connector.
Check why power is not
supplied to outdoor unit
sub PCB.
Connect communication
wire securely.
Defective outdoor unit sub
PCB
→
Replace.
Malfunction by temporary
noise
2. Error detection method
Detected communication error
of more than 15 seconds 4 times
in 15 minutes.
3 . Condition of error displayed
When communication is not
established between the outdoor
unit sub PCB and the outdoor
main PCB.
4. Presumable cause
• Defective outdoor unit sub
PCB
• Defective connector between
the outdoor unit main PCB
and outdoor unit sub PCB
• Defective outdoor unit main
PCB
Note:

Mitsubishi Heavy Industries SCM71ZS-W Specifications

General

Brand	Mitsubishi Heavy Industries
Model	SCM71ZS-W
Category	Air Conditioner
Language	English