It may be the battery as i don't have one simular. Unit works perfectly on heat and air conditioning.

Condition Description: Very slight marks
Power Source: Corded Electric
Refrigerant: R290
Grade Of Product: Used
Product Grade: Refurbished Grade B+
MPN: MC9000CHRPRO
Colour: White
Power Phase: 1 Phase
Brand: Meaco
Unit Type: Unit
EAN: 5060409604501
Heating System: Forced Air/Fan
Voltage: 220 V
Model: MC Pro 9000CH
Smart Home Protocol: Wi-Fi