Midea MDV-335(12)W/D2RN1T(C)

V4+R VRF 50/60Hz
201608 55
Part 5 - Diagnosis and Troubleshooting
4.4 E2 Troubleshooting
Digital display output 4.4.1
Description 4.4.2
 Communication error between indoor and master unit.
 All units stop running.
 Error code is only displayed on the master unit.
Possible causes 4.4.3
 Communication wires between indoor and outdoor units not connected properly.
 Indoor unit power supply abnormal.
 Loosened wiring within electric control box.
 Interference from high voltage wires or other sources of electromagnetic radiation.
 Communication wire too long.
 Damaged main PCB or electric control box communication terminals block.