Carrier 38VMH-1P Service Manual page 40

:
E6 OR EB: DC FAN ERROR
DEFINITION
• Fan rotation is less than 240 RPM for 20 seconds during operation.
• Fan rotation difference between the transient RPM and target one is larger than set value for three minutes.
• Eb will be reported on DIS1 if E6 occurs two times within ten minutes.
POSSIBLE CAUSES
• Burned out motor
• Incorrect wiring within electric control box
• Damaged power drive board
• Damaged main board of ODU
* NOTE 1: If resistance difference between the tested value and the one shown below is larger than 30%, the motor is burned out.
Between two terminals
Resistance (KΩ)
* NOTE 2: Check the power output from main board and connection wires before replacing it.
Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations.
Fig. 46 —E6 or Eb Troubleshooting Chart
Red and Black White and Black
≥ 1000 1.2
Yellow and Black
200
40
A210281
Blue and Black
≥ 1000