Troubleshooting From The Led Indicators - HP E1135C Operating And Service Manual

SERVICE INFORMATION

Troubleshooting From the LED Indicators

By observing the two LED indicators and the Outputs Enable Switch lamp, and observing
PDU operation, you can troubleshoot PDU problems. Table 6 assumes that the Outputs Enable
Switch is in the On position.
Table 6. Troubleshooting From the LEDs
Yellow Green Switch
LED LED Lamp
OFF OFF OFF
OFF OFF ON
OFF ON OFF
OFF ON ON
ON OFF OFF
ON OFF ON
ON ON
If the outputs of the PDU are being switched off often due to sags (low-line conditions), you
should take action to correct the mains. One source of information that explains how to reliably
measure the mains and correct low-line problems is a power primer called Why Peak
Measurements are More Reliable then RMS Measurements (HP E4000-90037, December 1995),
available through your HP representative.
HP E1135C POWER DISTRIBUTION UNIT Rev. C
34
Switched Problem
Outputs
OFF No line voltage (mains) is present
OFF Yellow LED is open
ON Outputs Enable Switch lamp is open
ON NORMAL OPERATION
OFF Line voltage went greater then 135/270 Vac
(surge) or S1 is set to the wrong position
OFF Line voltage went less than 85/170 Vac
(sag) or S1 is set to the wrong position
Invalid state; Control Board failure