Midea M2OC-18HFN1-M Service Manual page 35

For MTBU-12HRDN1-M, MTBU-18HRDN1-M, MCA2U-12HRFN1-M, MCA2U-18HRFN1-M, MUBU-
12HRFN1-M, MUBU-18HRFN1-M:
Operatio
Timer De-frost
n
★
X X
★
X X
★
X X
X X X
★ ★
X
★
X X

★
X
★  ★
 
★

★
X
★ 
X
★ ★ ★
★ ◎
X

★
X
Oasis series:
Operation lamp Timer lamp
★ 1 time
X
★ 2 times
X
★ 4 times
X
★ 5 times
X
★ 6 times
X
★ 2 times 
★ 3 times 
★ 4 times 
★ 5 times 

★ 6 times
★ 7 times 
Alarm
X Open or short circuit of T1 temperature sensor
X Open or short circuit of T2 temperature sensor
Communication malfunction between indoor and
X
outdoor units
★
Full-water malfunction
X Indoor EEPROM malfunction

IPM module protection
Open or short circuit of T3 or T4 temperature sensor
X
or outdoor EEPROM malfunction
X Outdoor fan has been out of control
X Indoor fan speed has been out of control

Voltage protection
X Temperature protection of compressor top.
X Outdoor unit over-current protection
X Inverter compressor drive protection

Mode conflict
★ flash at 2.5Hz,  light, X extinguished, , ◎flash at 0.5Hz
Note: Digital display is only available for duct type.
Display LED STATUS
E0 Indoor EEPROM malfunction
E1 Communication malfunction between indoor and outdoor units
E3 Indoor fan speed malfunction.
E4 Indoor room temperature sensor open or short circuit.
Evaporator coil temperature sensor open or short circuit.
E5
Outdoor temperature sensor open or short circuit.
F1
Condenser coil temperature sensor open or short circuit.
F2
Compressor discharge pipe sensor open or short circuit.
F3
F4 Outdoor EEPROM malfunction
F5 Outdoor fan has been out of control
F6 Indoor unit coil outlet temp. sensor open or short circuit.
Failure
ODU Error
Display
code
——
E0
——
E1
E2 E2
——
E3
——
E4
E5 P6
E0,E4
E6
E7 E8
——
F5
P0 E5
P1 P0
P2 P3
——
P4
——
P5
ODU
Error
——
E2
——
——
——
E4
E4
E4
E0
E8
E4