Connection description:
The detector needs to be connected to the outdoor panel of the inverter air conditioner to work normally.
When repairing different models, the connection methods are different, and the detector is equipped with an independent pair of wires:
1. The paired wiring is 4-core, and the colors of the core wires are white, yellow, black, and red.
2. The outer sheath of the wiring is a gray plastic sheath, there is a black heat shrinkable tube at the port, and the terminal interface is white A. For the inverter air conditioner board installed in reverse, it is equipped with a pair of wiring at the factory, and it is tested during maintenance. The instrument only needs to be directly connected to the white paired wiring interface reserved on the outdoor electric control box.
A. For the inverter air conditioner board installed in the forward direction, it is not equipped with a pair of wiring when it leaves the factory, and it needs to be connected to the socket of the outdoor electric control board through the pair of wiring: TESTPORT.
A. When connecting the sockets, pay attention to the direction of the sockets, plugging in the wrong direction will damage the detector 1!
The tester adapts to the voltage of 3.3V-5V. Before connecting the socket, please confirm the output voltage of the mainboard power supply! !

Start the outdoor unit separately:
The detector needs to be connected to the outdoor panel of the inverter air conditioner to work normally.
1. When there is no internal machine, directly plug the detector cable into the excavator board. Some boards have a reserved serial port cable, which can be directly connected to it.
2. Separately provide 200V voltage to the external machine, connect the detector, press the setting, press the "A" key, the external machine can run automatically; convenient and practical.
Giveaway
The latest version of Midea's air-conditioning fault code electronic version 2019.
Midea air-conditioning repair materials, drawings, materials, and video repair materials, free of charge with the purchase of this tester.
Fault code table:
When the indoor unit or outdoor unit fails, the display shows the corresponding fault code and switches between the original display and the fault display. The original display time is 2.5s, and the fault display time is 0.5s.
The left 3 digits of the display screen display the indoor fault code, and the right 3 digits display the outdoor fault code.

error code
Fault, protection or frequency limit
EO indoor unit E side failure
E1 indoor and outdoor unit communication failure
E2 indoor unit zero-crossing detection failure
E3 indoor unit fan stall failure
E5 outdoor unit temperature sensor or E side failure
E50 outdoor unit temperature sensor failure
E51 outdoor unit E side failure
E52 outdoor coil T3 temperature sensor failure
E53 T4 temperature sensor failure in outdoor environment
E54 outdoor exhaust temperature sensor failure
E55 outdoor return air temperature sensor failure
E6 indoor unit temperature sensor failure
E60 indoor unit room temperature T1 sensor failure
E61 indoor unit tube temperature T2 sensor failure
E7 outdoor unit DC fan stall failure
Eb indoor board and display board communication failure
PO outdoor unit IPM module protection
P1 voltage protection
P10 low voltage protection
P11 over-voltage protection
P12 outdoor DC side voltage protection
P2 compressor top temperature protection
PA condenser high temperature protection
PF: PFC module switch shutdown

P4 outdoor unit compressor feedback protection
P40 main control chip and drive chip communication failure
P41 compressor current sampling circuit failure
P42 compressor start failure
P43 compressor phase loss protection
P44 compressor zero speed protection
P45: Outdoor 341 main chip drive synchronization failure
P46 compressor stall protection
P47 compressor lock protection
P48 compressor de-regulation protection
P49 compressor overcurrent fault
P6 compressor discharge high temperature protection
P8 outdoor electric current protection
P80 indoor unit current protection
P81 outdoor unit current protection
P82 input AC current sampling circuit failure
P9 evaporator high and low temperature protection
P90 evaporator high temperature protection
P91 evaporator low temperature protection
LO evaporator high and low temperature limited frequency
L1 condenser high temperature limit frequency
L2 compressor discharge high temperature limit frequency
L3 current frequency limit
L5 voltage frequency limit
PFC failure frequency limit