Midea MGC-F05W/N1 Manual page 62

Specification
9. Error code Er20:
Judge 1: Check whether the differential
pressure switch is close.
Judge 2: Check whether the pump is
setting high.
Judge 3: Check whether the air is in
water circuit,
Judge 4: Check whether the filter is
air-logged.
Judge 5: Check whether the plate heat
exchanger is air-logged.
60
Values display indication Er20
Refer to the instruction manual: Water flow protection.
Judge 6: PCB is malfunction
Replace PCB
No
Close
pressure switch
Yes
No
Setting the pump in high.
Yes
Yes
Vent the air
No
Yes
Clean the impurity.
No
Yes
Clean the impurity.
No
MCAC-TSM-2008-02
the differential
Installation