Specifications

SQ: 1-4
RS3: Service Quick Reference Guide
Troubleshooting
Troubleshooting the Power System
AC/DC Power Supply Troubleshooting
Condition
Action
PS FAULT (red LED) on.
PS NORM (green LED) off.
Amber AC IN lamp not on and no A/C is
present.
1. Turn BATT ON/OFF switch OFF.
Disconnect the DC power plug at
supply. Voltage should measure
between 28 and 34 volts DC. If not,
replace the power supply.
2. Replace the battery charger board.
BATT TEST FAULT (red LED) on.
NOTE: The power supply will continue to
share the DC load without the battery or
the battery charger board installed.
1. Wait 60 minutes and press the BATT
TEST pushbutton.
2. Open the battery compartment and
determine if the battery connections are
OK.
NOTE: If the batteries show any sign of
leaking, such as white corrosion on the
battery posts, replace the batteries.
3. Check the fuse that is next to the
battery compartment inside the power
supply.
4. Replace the battery charger board.
Wait for 60 minutes and press the BATT
TEST pushbutton.
5. Replace the batteries.