THOR Jayco Precept 2021, Owner'S Manual

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Section 6: Electrical System
torhome is connected to 50 amp 120-volt AC shore power or when the generator is operat-
ing. All connected appliances operate off of shore power or generator power during this
time. If shore power is interrupted and the generator isn’t running, the inverter/charger(s)
will automatically activate providing 120-volt AC power to connected appliances. See the
inverter/charger owner’s manual for additional information.
Inverter/Charger battery charging function
The inverter/charger functions as a multi-stage battery charger when the motorhome is con-
nected to 120-volt AC shore power or when the generator is operating. The inverter/charger
automatically senses auxiliary battery condition and applies the appropriate battery charging
profile.
In the event the motorhome auxiliary batteries become completely discharged, the inverter/
charger will be unable to sense battery voltage and will not begin its charge sequence. To
manually initiate charging, turn the chassis ignition key to the “on” position for a short pe-
riod of time. If the batteries do not charge, or fail to hold a charge, they may be defective.
See the inverter/charger owner’s manual for additional battery charging information.
Inverter/Charger fault conditions
Certain fault conditions will cause the inverter to shut
down.
These conditions include:
 High or low battery
 Power consumption overload
 Inverter overheating
 Inverter internal fault
Refer to the inverter/charger owner’s manual for fault code
diagnosis and resolution.
Inverter/Charger 12-volt DC fuse
Each inverter/charger and its 12-volt wiring are pro-
tected by a replaceable high current fuse typically lo-
cated on the frame rail near the auxiliary battery bank.
A 2000 watt inverter/charger will be protected by a
300 amp fuse and a 3000 watt inverter/charger will be
protected by a 400 amp fuse.
Fuse Inverter/Charger integral 120-volt AC circuit breakers
The inverter/charger is equipped with integral 120-volt AC circuit breakers located on the
inverter/charger metal case. In overload conditions these circuit breakers will trip and inter-
NOTE: Leaving the inverter/charger in the “on” position when the mo -
torhome is in prolonged storage (no 120-volt AC shore power connected)
will drain the auxiliary batteries even though all 120-volt AC appliances are
turned off.
Inverter Fuse
Inverter
NOTE: High battery voltage may be caused by excessive or unregulated
voltage from solar panels and/or other external battery charging sources.
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