Fan failures, where the fan(s) are not spinning or are intermittent, may result in BIOS messages appearing during BIOS post.

In addition, installing specific PCIe cards and memory after the system has been received from HP factories may result in BIOS messages appearing during BIOS post.

Symptoms:

"511-CPU fan not detected."

"512-Rear Chassis fan not detected."

"513-Configuration requires a Front Chassis fan and this fan is not detected."

"517-Memory configuration requires a Memory fan and this fan is not detected."

"520-Memory configuration requires Memory fan(2) and this fan is not detected."

"521-Memory configuration requires Memory fan(3) and this fan is not detected."

"522-Memory configuration requires Memory fan(4) and this fan is not detected."

"523-CPU fan(2) not detected."

"524-Rear Chassis fan(2) not detected."

"525-Configuration requires Front Chassis fan(2) and this fan is not detected."

Information in this document applies to the following:

Systems:

• HP Z440 Workstation
• HP Z640 Workstation
• HP Z840 Workstation

Operating Systems:

• Non-OS Specific

Resolution steps below:
"511- CPU fan not detected" and/or "523-CPU fan(2) not detected.":
-Observe if CPU fan(s) are plugged in, if yes, call HP support.
"512-Rear Chassis fan not detected.":
-Observe if Rear Chassis fan(s) are plugged into motherboard, if yes, call HP support.
"513-Configuration requires a Front Chassis fan and this fan is not detected."
-If the error appears after additional PCIe cards have been installed, then the system requires a front fan assembly to ensure reliability of the hardware. Please order AMO kit P/N J9P80AA.
-If you have a front fan installed, check that the fan is plugged into the motherboard, if yes call HP support.
"517-Memory configuration requires a Memory fan and this fan is not detected."
-This error implies a memory fan in your system is not working or is intermittent. Call support.
"520-Memory configuration requires Memory fan(2) and this fan is not detected."
-This error implies a memory fan in your system is not working or is intermittent. Call support.
"517-Memory configuration requires a Memory fan and this fan is not detected." and "520-Memory configuration requires Memory fan(2) and this fan is not detected."
-If both errors appear after additional memory has been installed then the system requires a memory fan assembly to ensure reliability of the hardware. Please purchase AMO kit P/N J2R52AA (only for the Z440 workstation).
-If you have a memory fan assembly installed, this error is reported because a fan(s) are not working or are intermittent. Call HP support.
"521-Memory configuration requires Memory fan(3) and this fan is not detected." and/or "522-Memory configuration requires Memory fan(4) and this fan is not detected."
-Occurs only on the Z840 workstation and is because a fan(s) is not working or is intermittent. Call HP support.
"525-Configuration requires Front Chassis fan(2) and this fan is not detected."
-Only occurs Z840 workstation, call HP support