Thor Motor Coach CLASS B, Owner'S Manual

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8
E L E C T R I C A L S Y S T E M
T H O R M O T O R C O A C H | M A D E T O F I T
Safety Relays in the
OFF position Safety Relay rotated
to the ON position.
Depress the center
to engage the safety
relay Safety Relay
engaged, turning ON
the battery pack
Safety Relays for the Li-ion Battery System
NOTE: There is a safety relay for each lithium battery
pack. 400Ah systems will have one safety relay (one
battery pack), while 800Ah systems will have 2 safe-
ty relays (2 battery packs).
TURNING THE SAFETY RELAYS ON:
1. Rotate both yellow switch knobs to the left (ON position).
2. Depress the center of the knob to engage the safety relay
(powering the battery system).
TURNING THE SAFETY RELAYS OFF:
Rotate the yellow knob to the right (OFF position). The center
of the knob should automatically pop-out.
RESETTING A TRIPPED SAFETY RELAY:
If the battery system has shut-off and the safety relay(s) are
tripped:
1. Turn OFF all 120 volt appliances (air conditioner, appli-
ances, etc.) and disconnect appliances from the 120 VAC
receptacles.
2. Press the center of the yellow knob to re-set the safety
relay. If the safety relay does not latch, do not force it. The
Li-ion battery system will need repairs.
NOTE: If you do not have power and the safety relays
are NOT tripped, check the battery charge condition
on the Mastervolt control panel. It is likely the battery
packs need re-charging.
Battery Safety Event
A battery safety event triggers the safety relay to automatically
disconnect the battery from the loads and charging devices.
There are two kinds of battery safety events: a resettable and a
non-resettable.
A resettable safety event occurs if one of the
following conditions is met for 10 seconds:
• The battery voltage is less than 10.0V (12V battery) or
20.0V (24V battery);
• The battery voltage is more than 15.5V (12V battery) or
31.0V (24V battery);
• The voltage of one of the individual cells inside the Li-Ion
battery is too high or too low (2.5V / 4V •for 10 sec or 2V
/ 4.2V for 1 sec);
• The internal temperature of one of the individual cells is
too high (>85°C).
• This event is repeated every 60 seconds. It will only stop
repeating if:
The battery voltage returns and remains within specifi-
cations, i.e. 10.0-15.5V (12V battery) or 20.0-31.0V (24V
battery).
A non-resettable safety event occurs if one of the
following conditions is met for 10 seconds:
• The battery voltage is less than 9.0V (12V battery) or
18.0V (24Volt battery);
• The battery voltage is more than 16.0V (12V battery) or
32.0V (24Volt battery);
• The voltage of one of the individual cells inside the Li-Ion
battery is too high or too low (5V / 1.5V •for 1 sec);
• The internal temperature of one of the individual cells is
too high (>90°C).
Battery Charging
When the vehicle’s engine is running, battery charging is
accomplished with the vehicle’s secondary high-output alter-
nator, which is designed to charge the battery pack within a
few hours of driving. When parked, charging is accomplished
whenever shore power is connected (by the system’s invert-
er/charger). The inverter/charger automatically keeps the
battery(ies) in a state of charge by sensing and regulating the
charging needs of the battery pack.