E7

Indoor/Outdoor Communication Error (Signal Transmitting)

Description

The indoor unit detected a signal-transmitting error while communicating with the outdoor unit, often caused by wiring faults or electrical noise.

Appliance Error Codes Details

Error Code
E7
Error Name
Indoor/Outdoor Communication Error (Signal Transmitting)
Appliance Type
air_conditioner
Brand
Mitsubishi
Severity
high

Additional Troubleshooting

1. Turn off power to both indoor and outdoor units, wait, then turn back on
2. Check that the indoor/outdoor connecting wire is correctly and securely connected
3. Check for sources of electrical noise near the connecting wire or power supply
4. Contact service if the error persists

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Verified by: Pavel Volkov
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Information verified against official sources

Official Sources

Official Manufacturer Service Manuals

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Original equipment manufacturers official documentation

Industry Standards Organizations

International standards for electrical appliances and error codes

International Electrotechnical Commission standards

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