FanL / Fan Cooling Fan Lock / Failure fault in Toshiba drive
FanL / Fan Cooling Fan Lock / Failure fault in Toshiba drive
Description On larger or higher-spec Toshiba drives (like the AS3 or G9), the cooling fans are 3-wire or 4-wire types with a tachometer feedback signal. The drive monitors the RPM of the fans. If a fan slows down significantly or stops due to a blockage, the drive trips "FanL" (Fan Lock) immediately. This is proactive protection to prevent the IGBTs from overheating (OH). Causes
1. Physical Debris: A zip tie, wire clipping, or rodent has entered the fan housing and physically jammed the blades.
2. Bearing Seizure: The fan bearings have dried out due to age, causing the fan to spin too slowly.
3. Disconnected Wire: The small feedback wire (often yellow or white) in the fan plug has pulled loose.
4. Power Supply: The 24V supply driving the fans has failed. Solution Visually inspect the fans. Are they spinning? If one is stopped, poke it (safely) to see if it moves freely. If it is stiff, the bearing is seized—replace the fan.
If the fan spins freely but doesn't run, check the connection. Unplug and reseat the fan cassette.
If you need to run the drive temporarily while waiting for a spare fan (and the ambient temperature is cool), you may be able to disable the "Fan Fault Selection" parameter. However, this is risky. You must monitor the Heatsink Temperature (Monitor Mode) constantly. If it exceeds 80°C, stop manually. Note that small drives often don't have feedback fans; this fault is specific to units that do.
Description On larger or higher-spec Toshiba drives (like the AS3 or G9), the cooling fans are 3-wire or 4-wire types with a tachometer feedback signal. The drive monitors the RPM of the fans. If a fan slows down significantly or stops due to a blockage, the drive trips "FanL" (Fan Lock) immediately. This is proactive protection to prevent the IGBTs from overheating (OH). Causes
1. Physical Debris: A zip tie, wire clipping, or rodent has entered the fan housing and physically jammed the blades.
2. Bearing Seizure: The fan bearings have dried out due to age, causing the fan to spin too slowly.
3. Disconnected Wire: The small feedback wire (often yellow or white) in the fan plug has pulled loose.
4. Power Supply: The 24V supply driving the fans has failed. Solution Visually inspect the fans. Are they spinning? If one is stopped, poke it (safely) to see if it moves freely. If it is stiff, the bearing is seized—replace the fan.
If the fan spins freely but doesn't run, check the connection. Unplug and reseat the fan cassette.
If you need to run the drive temporarily while waiting for a spare fan (and the ambient temperature is cool), you may be able to disable the "Fan Fault Selection" parameter. However, this is risky. You must monitor the Heatsink Temperature (Monitor Mode) constantly. If it exceeds 80°C, stop manually. Note that small drives often don't have feedback fans; this fault is specific to units that do.
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