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The SK-PS power supply has 3 system LED indicators for Power, Batt/Chgr Fault, and Ground Fault. In addition, each available output cir-
cuit also has 2 status LEDs. Refer to Figure 1.1 on page 11 for LED locations. A description of each SK-PS LED indication is given below.
Ground Fault LED (yellow)
No Fault
Fault Condition:
ground fault
Power LED (green)
No Fault
Fault Condition:
AC power loss (or brownout)
1 short blink (250ms)
Battery fault LED (yellow)
No Fault
Fault Condition:
Charging path (FETs) failure
1 short blink (250ms)
Fault Condition:
Charger voltage too low or
Charger Diode Fault
2 short blinks (250ms)
Fault Condition:
Battery
discharged/overcharged
3 short blinks (250ms)
Fault Condition:
Battery disconnected/fully
discharged
4 short blinks (250ms)
SK-PS Series Instruction Manual — P/N LS10227-002SK-E:C 2/2/2022
Section 4: LED Indicators
LED is OFF
LED is ON constant
LED is ON constant
Repeating LED blink pattern (non-diagnostic phase and diagnostic phase)
250ms 250ms 250ms 250ms 250ms 250ms 250ms 250ms
*Retrofit Mode will be indicated by an LED blink on the NAC1 Trouble LED only.
LED is OFF
Repeating LED blink pattern (non-diagnostic phase and diagnostic phase)
250ms 250ms 250ms 250ms 250ms 250ms 250ms 250ms
Repeating LED blink pattern (non-diagnostic phase and diagnostic phase)
250ms 250ms 250ms 250ms 250ms 250ms 250ms 250ms
Repeating LED blink pattern (non-diagnostic phase and diagnostic phase)
250ms 250ms 250ms 250ms 250ms 250ms 250ms 250ms
Repeating LED blink pattern (non-diagnostic phase and diagnostic phase)
250ms 250ms 250ms 250ms 250ms 250ms 250ms 250ms
*Retrofit Mode will be indicated by an LED blink on the NAC1 Trouble LED only.
Retrofit Mode*
pause
1000ms
1000ms
Retrofit Mode*
pause
1000ms
1000ms
Retrofit Mode*
pause
1000ms
1000ms
Retrofit Mode*
pause
1000ms
1000ms
Retrofit Mode*
pause
1000ms
1000ms
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