Samsung DVM CHILLER E448 Error Code: Fan Motor Locked in Outdoor Unit

Troubleshooting Steps: Condenser with 2 Fans

[Image Description: Outdoor unit with two fans, labeled FAN #1 and FAN #2. FAN #1 is on the left-hand side of the unit.]

1. Remove power to the condensing unit for a minimum of 15 minutes.
2. Inspect the fan blade and make sure there are no obstructions.
3. Verify blade spins freely.
4. There are two plug connections for each fan motor: Power (red, white, and black) and hall effect sensor. [See Fan Motor Connector Description]
5. Follow and inspect wiring. Make sure there is no damage to wires or plugs.
6. Make sure all plugs and spade connectors are secure and connected properly.
7. Disconnect power plug (Fan motor 1 is white plug, Fan motor 2 is blue plug). Check resistance at plug going to Fan motor: Red-White, Red-Black, and White-Black. The resistance value between each winding should be equal, under 10Ω, and open to ground.
8. Reverse connector plugs for Fan motor 1 and Fan motor 2 (Fan Motor and Hall Effect plugs).
9. Restore power to the unit. If the E448 error returns, replace fan PCB. If the error changes to E348, replace the fan motor.
10. If results are inconclusive, and you have an inverter checker tool, continue to inverter Fan PCB test.
11. Remove power from the unit for a minimum of 15 minutes. Remove Fan connections from Fan PCB and connect inverter checker.
12. Restore power to unit. Press K2 button 11 times to initiate the inverter test for fan motor 1.
13. If the inverter test fails, replace Fan PCB. If it passes, replace Fan motor.

[Video demonstration available: Click the icon below to see this troubleshooting technique.]

[Image Description: FAN Motor Connector showing a white plug with red, white, and black wires.]

[Image Description: Hall-sensor Connector showing a blue plug.]

Troubleshooting Steps: Condenser with 1 Fan

1. Turn the power to the system off and wait 15 minutes.
2. Inspect the fan blade and make sure there are no obstructions.
3. Verify blade spins freely.
4. There are two plug connections for fan motor: Power (red, white, and black) and hall effect sensor.
5. Follow and inspect wiring. Make sure there is no damage to wires/plugs.
6. Make sure all plugs and spade connectors are secure and connected correctly.
7. Unplug power plug (Fan motor 1 is white plug). Ohm out connections: U-V, U-W, V-W. The resistance value between each winding should be equal, under 10Ω, and open to ground.
8. If all values are within range, remove fan connections from board and connect inverter checker to Fan PCB.
9. Press K2 button 11 times to initiate the inverter test for fan motor 1. [Inverter test video]
10. If the inverter test fails, replace Fan PCB. If it passes, replace fan motor.

[Video demonstration available: Click the icon below to see this troubleshooting technique.]

[Image Description: FAN Motor Connector showing a white plug with red, white, and black wires.]