MCAC-VTSM-2016-02 R410A All DC Inverter Mini VRF
Troubleshooting 65
4.2 E2: Communication malfunctions between indoor unit chip and outdoor unit chip.
*Outdoor unit chip refers to 0537 chip.
LED displays E2
Communication malfunctions between indoor unit chip and outdoor unit chip.
Judge 3: check the communication wire
sequence is correct or not.
Connect the wire again.
NO
Judge 4: Check whether there is disconnection.
YES
Replace
NO
Judge 2: check whether the three-cored
shielded wire is used as the communication
wire and earthed properly.
YES
Replace shielded wire or earth the wire
properly.
NO
PCB of indoor unit and outdoor unit malfunction.
Please replace.
Judge 1: Check whether the indoor unit is
power on
Plug the indoor unit in.
NO
YES
