E1 Remote Controller Communication Circuit Error - Mitsubishi Heavy Industries SRK20ZJX-S Service Manual

Error code
Remote controller:
E1
1. Applicable model
All models
2. Error detection method
When normal communication
between the remote controller
and the indoor unit is
interrupted for more than 2
minutes. (Detectable only with
the remote controller)
3. Condition of Error displayed
Same as above
4. Presumable cause
• Defective communication
circuit between remote
controller-indoor unit
• Noise
• Defective remote controller
• Faulty indoor control PCB
Note:
If the indoor unit cannot communicate normally with the remote controller for 180 seconds, the indoor contnrol PCB starts
to reset automatically.
LED Green Red
Keeps flashing Stays OFF
Indoor
– Stays OFF
Outdoor
5. Troubleshooting
Diagnosis
Is it possible to
reset normally by the
power reset?
NO
Turn SW7-1 to OFF. ON
Remove the wire connecting
between indoor/outdoor units.
Power reset
Does the drain
pump restart automatically
1 minute later?
NO
Note (2) Does the remote controller still display "
after 3 minutes?
90
-
Content
Remote controller
communication circuit error
YES
YES
" even
WAIT
-
'10 • SCM-SM-094
Countermeasure
Malfunction by noise
Check peripheral
environment.
Defective indoor control
PCB Replace.
Defective remote controller
Replace.