EG4 › Problems
EG4 12000XP: one fan runs at full speed nonstop
On an EG4 12000XP, one cooling fan runs at full speed nonstop and ignores the fan-speed setting, while the other fans stay off or low. This page covers what to check first and the causes behind it.
What to check first
- Note which fan runs at full speed, and whether the other fans, on this inverter and on any inverter paralleled with it, stay off or low.
- Lower the fan speed setting for that fan and note whether it slows down.
- If that fan stays at full speed, report it to EG4, which has called this a known issue affecting other customers.
The causes and the fixes
Partners see the causes behind this problem, most common first, the checks that tell them apart, and the fix for each, with part numbers and recent prices when a part is involved.