0H9 0P9: Dc Fan Protection - Carrier 38VMA Series Service Manual

v. 0H9 0P9: DC Fan Protection
1. Error display:
ODU display: 0H9 0P9
Display on line controller: 0H9 0P9
2. Applicable models:
38VMA***HDS5-1
38VMA***HDS6-1
3. Error definition:
Multiple errors related to ODU fan motor and fan motor driver.
Check whether the following are normal:
•
Fan motor of ODU
•
Fan board
•
Power supply of fan board
•
Signals between fan board and main board
4. Possible causes:
•
Check wiring between the main board to the fan board, power lines from the power supply circuit to the fan board, wires
from the fan motor to the fan board
•
Check DIP-IPM screws on the fan board
•
Damaged power circuit of fan board
•
Damaged fan board
•
Damaged fan motor
•
Damaged main board
61