Louver Swing Failure Troubleshooting - Midea MDV-D22Q1/N1-D Technical Manual

3.10. Louver Swing Failure Troubleshooting

3.10.1. Display output
▪ No special display output or error code.
3.10.2. Description
▪ Louvers fail to respond to instruction from wired or remote controller.
3.10.3. Possible causes
▪ Louver swing motor not connected properly or has malfunctioned.
▪ Damaged main PCB.
3.10.4. Procedure
Louver Swing Failure
Louver swing motor connection on
main PCB is loose
The louver motor has malfunctioned
Replace indoor main PCB
Notes:
1. The louver swing motor connection on each type of indoor unit main PCB is labeled in Figures 1.1 to 1.19 in
2. Measure the resistance between the red wire and each of the other four wires (orange, yellow, pink and blue) at the louver swing motor connection on
the main PCB. The resistances between the red wire and each of the other four wires should all be the same, should not be zero and should not be
infinite. If the resistances are not the same, or if any of the resistances are zero or infinite, the louver swing motor has malfunctioned. The louver swing
motor connection on each type of indoor unit main PCB is labeled in Figures 1.1 to 1.19 in
1
No
No
Figure 5.2: Louver swing motor connection wiring on indoor unit main
PCBs
Ensure the wires are connected
Yes
Yes
Repair the motor or replace it
1, "Main PCB
44
properly
1, "Main PCB Ports".
Ports". Refer also to Figure 5.2.