DuctlessAire DA1221-H2-I, Service Manual

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8.1 Indoor Unit Error Display
Operation
lamp
Timer lamp Display LED STATUS
☆
1 time
X E0 Indoor unit EEPROM parameter error
☆
2 times
X E1 Indoor/outdoor units communication error
☆
3 times
X E2 Zero-crossing signal detection error
☆
4 times
X E3 Indoor fan speed has been out of control
☆
5 times
X E4
Indoor room temperature sensor T1 open circuit or short circuit
☆
6 times
X E5
Evaporator coil temperature sensor T2 open circuit or short
circuit
☆
7 times
X EC Refrigerant leakage detection
☆
1 times
O F0 Overload current protection
☆
2 times
O F1
Outdoor ambient temperature sensor T4 open circuit or short
circuit
☆
3 times
O F2
Condenser coil temperature sensor T3 open circuit or short
circuit
☆
4 times
O F3
Compressor discharge temperature sensor TP open circuit or
short circuit
☆
5 times
O F4 Outdoor unit EEPROM parameter error
☆
6 times
O F5 Outdoor fan speed has been out of control
☆
1 times
☆
P0 IPM malfunction or IGBT over-strong current protection
☆
2 times
☆
P1 Over voltage or over low voltage protection
☆
3 times
☆
P2
High temperature protection of IPM module or compressor top
☆
4 times
☆
P3* Outdoor ambient temperature too low.
☆
5 times
☆
P4 Inverter compressor drive error
☆
6 times
☆
P5 Indoor units mode conflict (multi-zone ONLY)
☆
7 times
☆
P6 Low pressure protection
O
（
light
）
X
（
off
） ☆ （
flash)
*P3
1) In heating mode, when the outdoor temperature is lower than -25˚C for 1 hour, the indoor unit display
error code P3.
2) If the outdoor temperature is higher than -22˚C for 10 minutes and compressor stop for 1 hour or outdoor
temperature is higher than -5˚C for 10 minutes, then the unit will return to work.
* Fault Symptom: The display board shows a garbled code or a code that is not an error code found in the service
manual or a temperature reading.
Trouble shooting:
Use the remote controller. If the unit does not respond to the remote, the indoor PCB needs to be replaced; if
the unit does respond, then the display board needs to be replaced.