Carrier 38VMA Series - 0 H9 0 P9: DC Fan Protection

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
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