Alpha Technologies CFR 600, CFR 600XT, CFR 1000 - Manual (Page 62)

6. MAINTENANCE
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Figure 20
Standard Interface Device (Troubleshooting)
SERVICE LED
OUTPUT LOAD LED's
ALARM OFF Switch
Standard Interface Device - Fault Indicators
6.7 Troubleshooting Using the SID
LED Status Condition
OVERLOAD Flashing Not Applicable
OVERLOAD ON Fast Detector / Low Sensitivity Fault
100% Flashing PLL Fault
100% ON High Ambient Temperature
75% Flashing Output Voltage High
75% ON Output Voltage Short Circuit
50% Flashing PWR BRD Fault / -5 VDC Failure
50% ON PWR BRD EPROM Failure
25% Flashing Self-Test Failure
25% ON Battery Over-Voltage / Charger Fault
The OUTPUT LOAD LED’s, located on the front panel of the Standard
Interface Device, are designed to display UPS fault conditions once the unit
has detected an internal problem, indicated by the SERVICE LED. This
information provided by the LED’s is extremely useful during troubleshooting
and maintenance. If the UPS is equipped with an I
2 D, refer to its operator’s
manual for further troubleshooting information.
If your UPS SERVICE LED is ON, press and hold the ALARM OFF
switch for approximately 3 seconds. The OUTPUT LOAD LED's indicate: