Kenworth Y53-1024 Operator's Manual page 41

Troubleshooting
Troubleshooting
Concern
Sleeper AC electrical No power to sleeper AC
outlets not working. electrical outlets.
Cannot run cab/sleeper Not enough power
DC loads. available for cab/sleep-
er DC loads.
Cannot start truck. Voltage at main batter-
ies is too low (below
9.5-Volt).
Cannot start truck. Not enough cranking
power from starting
batteries.
Kenworth
Possible Cause
1) Make sure inverter switch is in the ON position.
2) Make sure the Protection Unit circuit breaker is not tripped, reset if necessary.
3) Make sure Protection Unit GFCI is not tripped, reset if necessary.
4) Component service.
1) Make sure battery disconnects are not tripped, reset if necessary.
2) Make sure LVD is not tripped (to reset, main battery voltage must be brought up to 13.2-Volts
by starting the truck or using 120-Volt AC electrical supply).
3) Check main battery voltage, if voltage is below 11.0-Volts, start truck to charge batteries,
hook up 120-Volt AC electrical supply to charge batteries, or attach battery charger to charging
terminals.
1) Make sure battery disconnects are not tripped, reset if necessary.
2) Hook up to 120-Volt AC electrical supply to charge main batteries or attach battery charger to
charging terminals.
1) Check starting battery voltage, if voltage is below 12-Volt (check at starter using voltmeter),
charge starting batteries with external battery charger.
2) If starting battery voltage continues to discharge, replace starting batteries and/or service
DC/DC charger.
Remedy
Y53-1024 12/06 - 41 -