Communication Error - Mitsubishi Heavy Industries SRK20ZJX-S Service Manual

Error code
Remote controller:
E45
1. Applicable model
All models
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
sub PCB and the outdoor main
PCB.
4. Presumable cause
• Defective sub PCB
• Defective connector between
the outdoor main PCB and
outdoor sub PCB
• Defective outdoor main PCB
Note:
LED Green Red
Indoor Keeps flashing Stays OFF
Outdoor – 4 times flash
5. Troubleshooting
Diagnosis
Is the connector
connection between the outdoor
main PCB and the outdoor sub
PCB OK?
YES
Is the power supply voltage OK?
YES
Is the
communication wire
between the main PCB and the outdoor sub
PCB connected properly?
YES
Replace the outdoor main PCB.
Is normal state restored?
107
-
Content
Outdoor sub PCB

communication error

NO
NO
NO
NO
YES
-
'10 • SCM-SM-094
Countermeasure
Correct connector.
Check why power is not
supplied to outdoor sub
PCB.
Connect communication
wire securely.
Defective outdoor sub PCB
Replace.
Malfunction by temporary
noise