Failure to observe these precautions could cause
an explosion or fire, resulting in serious property
damage, and personal injury or death.
NOTICE
Always ensure that air inlet and outlet grilles are
not restricted. Restriction of any air inlet or outlet
ports could result in damage to the auxiliary
heater.
IMPORTANT: To maintain reliable performance,
run the accessory heater for at least 15 minutes
every month to prevent fuel from degrading.
On vehicles without Optimized Idle, accessory heat-
ers function when the ignition switch is in the OFF
position and the cab load disconnect switch (if
equipped) is in the ON position.
On vehicles with Optimized Idle, accessory heaters
function when the ignition switch is in the ON or ACC
position, the cab load disconnect switch (if equipped)
is in the ON position, and the parking brake is en-
gaged. The heater may run briefly after the ignition
key has been turned to the OFF position.
IMPORTANT: Wait eight minutes after shutting
down an accessory heater before turning the
cab load disconnect switch (CLDS) to OFF.
NOTE: The low voltage disconnect (LVD) control
prevents a heater from draining the batteries
below starting voltage.
Eberspaecher (Espar) Heater
Refer to the Eberspaecher website,
www.eberspaecher-na.com, for additional informa-
tion.
Eberspaecher Digi-Max D1000 Controller
To turn the heater on, press the POWER button. See
Fig. 8.6. The display will indicate that heater is en-
abled and show the remaining runtime and the set
temperature. See
Fig. 8.7. The green LED indicates
that the heater is on.
To adjust the desired temperature, press the left or
right arrow buttons. The left arrow button lowers the
desired temperature, and the right arrow button
raises it. The adjustment range is from 48 to 93°F (8
to 34°C).
To turn the heater off, press the POWER button
again. The heater will initiate a 5- to 8-minute cooling
cycle.
The controller has a real-time diagnostic feature, and
will automatically display fault codes as they happen
(e.g. 48—Check Fuel Pump). The red LED will illumi-
nate, indicating that maintenance is required.
The controller has a programmable run timer that will
display a maintenance message on the LCD after the
set time limit when the heater is off. See
Fig. 8.8.
The fault codes and maintenance messages will not
prevent the heater from operating, but they reflect
conditions that should be addressed promptly.
f61146310/17/2016
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2
3
456
1. Heater Enabled LED (green)
2. LCD Display
3. Maintenance Required LED (red)
4. Temperature UP Button (right arrow)
5. Power Button
6. Temperature DOWN Button (left arrow)
Fig. 8.6, Eberspaecher Digi-Max D1000 Controller
f61146210/17/2016
1
2
1. Remaining Runtime
2. Set Temperature
Fig. 8.7, Controller LCD
f61146410/17/2016
Fig. 8.8, Maintenance Required Message
Climate Controls
8.4
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