Midea R32 M thermal Arctic Mono fault EL

What it means

Communication fault between hydraulic module and MH-kit. Displayed on User Interface.

Likely causes

1. Loose communication wiring, damaged communication cable, module malfunction, shielding issue
2. Communication cable connection not following T1→X/HA, T2→Y/HB, E→E or was disconnected. Communication cables short circuited or damaged. Strong electric and magnetic interference around communication cables. When MH-kit is not connected to heat pump, S2-1 of hydraulic module PCB is set as ON.
3. Communication fault between hydraulic module and MH-kit
4. Inverter module damaged

Where to start

1. Step 1: Check if communication cable connection between Hydraulic module PCB and MH-kit was not follow T1→X/HA, T2→Y/HB, E→E or was disconnected. If yes, reconnect cables correctly. Step 2: Check if communication cables were short circuited or damaged. If yes, replace communication cables. Step 3: Check for strong electric and magnetic interference around communication cables. If yes, keep cable away from interference areas. Step 4: Check if S2-1 of hydraulic module PCB is set as ON when MH-kit is not connected. If yes, reset S2-1 as OFF. Step 5: If all checks pass, request after-sales service.
2. Check S2-1 switch setting on hydraulic module PCB when MH-kit is not connected.
3. Inspect communication wiring connections, verify cable integrity, check for EMI interference, test module communication