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DLFSAB and DLFLAB: Service Manual

Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations.

DIAGNOSIS AND SOLUTION (CONT.)

EH03 / EC07 - Fan Speed Is Operating Outside of Normal Range / EC 71 Over Current Failure of

Outdoor DC Fan Motor / EC73 Zero-speed failure of outdoor DC fan motor Diagnosis and Solution

Description: When the indoor / outdoor fan speed operates at too low or too high a speed for a certain time, the unit ceases

operation and the LED displays the failure.

Recommended parts to prepare:

• Connection wires

• Fan assembly

•Fan motor

•PCB

Troubleshooting and Repair:

NOTE: For certain models, the outdoor PCB cannot be removed separately. In this case, the outdoor electric control box should

be replaced as a whole.

YES

Power o. Restart the unit after 2 minutes.

Is it within normal parameters?

Replace the fan motor.

Does a problem remain? The unit is operating normally.NO

Shut o the power supply.

Rotate the fan by hand.

YES

Does it turn easily?

Inspect the unit for an obstruction and remove.NO

Check the fan motor wiring.

YES

Is it improperly wired? Ensure the proper connections.

Measure the voltage for

the fan motor from the PCB.

YES

Replace the main PCB.NO

Midea DLFSAB Series User Manual

Questions and Answers: