General Fan Motor Check Steps

1. Check DC Voltage

   • Use caution when checking DC volts on fan motors.

2. Check Fuse

   • Inspect the 3.15A fuse on the control board using a continuity test.

   • If the fuse is open, replace the control board and fan motor.

3. Spin Test

   • Unplug the fan motor from the control board.

   • Manually spin the fan blade; it should rotate freely for two full revolutions.

4. Ohm Test

   • Use a meter with a 400k ohm rating or higher.

   • Unplug the fan motor.

   • Place the black lead on the motor's black wire.

   • Place the red lead on other fan leads one at a time.

   • Refer to charts for proper ohm readings.

Sample Ohm Readings by Model

Model	Red-Black	White-Black	Yellow-Black	Brown/Blue-Black
AOU9RLFC	300K-OL	110K-130K	70K-90K	Mega Ohms-OL
AOU18RLXFW	300K-OL	45K-55K	120K-140K	Mega Ohms-OL
AOU24RLXFW	300K-OL	40K-100K	120K-140K	Mega Ohms-OL
AOU36RLXB	300K-OL	45K-55K	120K-140K	Mega Ohms-OL
AOU15RLFF	300K-OL	110K-130K	90K-105K	75K-100K
AOU18RLFC	300K-OL	45K-55K	120K-140K	Mega Ohms-OL
AOU24RLXFZ	300K-OL	40K-100K	120K-140K	Mega Ohms-OL
AOU30RLX	300K-OL	45K-55K	120K-140K	Mega Ohms-OL
AOU42RLX	300K-OL	40K-100K	120K-140K	Mega Ohms-OL
AOU48RLXFZ	300K-OL	100K-125K	240K-265K	Mega Ohms-OL
AOU9RL2	300K-OL	115K-145K	75K-100K	Mega Ohms-OL
AOU36RLXFZH	300K-OL	45K-55K	120K-140K	Mega Ohms-OL

 

 

See attached document for the rest of the fan motor readings.

 

Here is a video on how to perform the check.

 

DC Voltage Check for Board vs. Motor Issue

• Use provided charts to identify correct voltage values.

• This helps confirm whether the problem is with the control board or the fan motor itself.

Outdoor Fan Motor Error
 

Outdoor fan motor error codes by model:
 

9x Operation & 7x Timer:
 

RL2 series, RLS3 series, RLS2 series, RLB/RLXB series, RLF series, RLF1 series, LUAS1 series, LMAS series, LZBS series, LZAS series, LPAS series, RGLX series, RLE series
 

 
 

5x Operation & 6x Timer:
 

RLS series, RLXS series, CQ series, RQ series, R2 series, RL series, RML series, RMLQ series, CLX series, CLX1 series, RLX series, RLXQ series, CL1 series, CL series, RLQ series
 

 
 

Continuous flash Operation & 14 flashes Timer flash:
 

ABU18RULX, ABU24RULX & ABU36RSLX
 

 
 

9 flashes on LED A, 7 flashes on LED B, 1 flash on LED E & 1 flash on LED F:
 

AOU36RLXFZH & AOU45RLXFZ
 

 
 

2 flashes on Power Mode LED, Solid Error LED, 9 flash L1, 7 flash L2, solid L5 & solid L6 / 2 flashes on Power Mode LED, Solid Error LED, 9 flash L1, 8 flash L2, solid L5 & solid L6:
 

AOU30RLXEH
 

 
 

E973 outdoor LED:
 

AOU48RLXFZ & AOU48RLXFZ1
 

 
 

97 / 98 / 1B Wired remote: 
 

UTY-RNBYU, UTY-RNNUM, UTY-RVNUM, UTY-RSNUM, UTY-DMMUM, UTY-RSRY & UTY-RNRUZ Series, UTY-RHRY
 

 
 

Outdoor Fan Motor Error Troubleshooting Checklist