E1 Troubleshooting; Possible Causes - Midea MDV-D22Q1/N1-D Technical Manual

3.3.

E1 Troubleshooting

3.3.1. Display output
or
3.3.2. Description
▪ Communication error between indoor and outdoor units.
3.3.3. Impact on other units
▪ Refer to
4.2 "Impact on Other
3.3.4.

Possible causes

▪ Communication wires between indoor and outdoor units not connected properly.
▪ Interference from high voltage wires or other sources of electromagnetic radiation.
▪ Communication wire too long.
▪ Damaged main PCB.
TIMER LED
flashes
twice per
second
Units".