Operator`s manual

MAINTENANCE AND LUBRICATION
469
Battery Voltage Protection System (Optional)
A Battery Protection Relay (External Relay 8) is added to the fuse and
relay center. This relay will disconnect Power Relay 1, disabling certain
cab circuits in addition to those disabled by the sleeper control panel.
This conserves battery power.
The Sleeper control module will display “Err” (error) if there is a fault
with External Relay 8.
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