Ee Troubleshooting - Midea MDV-D22Q1/N1-D Technical Manual

3.8.

EE Troubleshooting

3.8.1. Display output
or
3.8.2. Description
▪ Water level error.
3.8.3. Impact on other units
▪ Refer to
4.2 "Impact on Other
3.8.4. Possible causes
▪ Water level float stuck.
▪ Water level switch not connected properly.
▪ Damaged main PCB.
▪ Drain pump has malfunctioned.
3.8.5. Procedure
The water level float is stuck
Water level switch connection on
main PCB has short circuited or
disconnected
The power supply to the drain pump
The drain pump motor has
malfunctioned
Notes:
1. The water level switch connection port on each type of indoor unit main PCB is labeled in Figures 1.1 to 1.19 in
2. Measure the voltage between the two pins of the drain pump connection on the indoor unit main PCB. The normal voltage range is 220 to 240 V (AC).
The drain pump connection port on each type of indoor unit main PCB is labeled in Figures 1.1 to 1.19 in
3. Measure the resistance between the two power supply terminals on the drain pump motor. If the resistance is either zero or infinite, the motor has
malfunctioned.
ALARM LED
flashes
twice per
second
Units".
EE
No
1
No
2
is abnormal
No
3
Yes
Inspect the float and repair it
Ensure the switch is connected
Yes
Yes
Replace indoor main PCB
Yes
Replace the drain pump
42
properly
1, "Main PCB Ports".
1, "Main PCB Ports".