Safety first: Unplug before removing the bucket/filter and cleaning coils. Do not bend refrigerant tubing or use sharp tools on fins. Move the unit upright, and never repair refrigerant lines yourself.
Confirm exact model and variant
Midea MAD50C1AWS (check full data plate); do not confuse it with a similar MAD50 pump-equipped suffix. The cited document distinguishes pump and no-pump protection codes.
Version check: MAD50C1AWS is the non-pump variant. Do not use the drain-pump repair instructions for pump-equipped models.
DIAGNOSE THE CAUSE · APPLY THE FIX · CONFIRM THE RESULT
Find the cause and fix it
Jump to your symptom: 01 · EC appears and moisture removal has stopped02 · EC reappears after restart
01
EC appears and moisture removal has stopped
HOW TO CHECK & CORRECT THIS CAUSE
- EC is the manufacturer's refrigerant-leak detection indication.
- Switch off, unplug and keep air access unobstructed.
- A single controlled restart may distinguish an intermittent display event, but never add refrigerant yourself.
How to tell it is fixed: Only treat as resolved if EC disappears and normal moisture removal continues through repeated cycles.
02
EC reappears after restart
HOW TO CHECK & CORRECT THIS CAUSE
- Stop running the compressor.
- A licensed refrigeration technician must leak-test, find and repair the leak, evacuate and recharge according to the equipment nameplate and applicable regulations.
- Refilling without repairing a leak is not a lasting fix.
How to tell it is fixed: After professional repair, EC remains absent and measured dehumidification returns.
Model source and method basis
Reference: Read corresponding manufacturer/manual source ↗
The fault definitions, named controls and any published specifications follow the linked documentation. Ordered isolation tests are conservative explanatory procedures, not a claim that all checks are verbatim factory service instructions. If the stated manual does not establish a measurement or part compatibility, this guide deliberately does not invent it.