hydrogen HYUNDAI NEXO 2019 Owner's Manual

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Hydrogen leak detected. Stop
safely immediately
This warning message is displayed
and the hydrogen gas leak warning
light (red) illuminates when the
hydrogen leakage is detected in the
vehicle. In this case, we recommend
you to stop driving and stop the vehi-
cle immediately at a safe area. Then
turn off the vehicle and have your
vehicle inspected by an authorized
HYUNDAI dealer.
Check hydrogen leak sensor
This warning message is displayed
and the light showing the malfunction
of the hydrogen leakage detection
sensor illuminates when there is a
malfunction with the hydrogen leak-
age detection sensor. In this case,
have the vehicle checked by an
authorized HYUNDAI dealer.
Refueling…
This warning message is displayed
while refueling the vehicle. Do not
turn on the vehicle and wait until the
refueling is complete.Check fuel door sensor
This warning message is displayed
when there is a malfunction with the
sensor located below the fueling inlet
which is used for communicating
with the fueling station. Check and
remove if there is any foreign sub-
stance around the fueling inlet.
If this message is still displayed after
the foreign substance is removed,
have the vehicle checked by an
authorized HYUNDAI dealer.
Open fuel door after turning
vehicle Off
This warning message is displayed
when you try to open the fuel filler
door while the vehicle is turned on.
Turn of the vehicle and open the fuel
filler door. If the message is still dis-
played after a while, have the vehicle
checked by an authorized HYUNDAI
dealer.Replace hydrogen tank.
Maximum number of refill
cycles exceeded
This warning message is displayed
when the number of times refueling
the vehicle exceeds the predefined
number (4,995 times). The fuel cell
system stops operation for safety
even if the vehicle is refueled enough
and when there is no problem with
the vehicle. In this case, have the
hydrogen storage system replaced
by an authorized HYUNDAI dealer.
Power limited due to fuel cell
system error
This warning message is displayed
when there is a malfunction with the
fuel cell system and the power sup-
ply to the fuel cell system is limited.
If the warning light stays on when in
"Ready ( )" state or while driving
the vehicle, this indicates that the
fuel cell system may have failure. In
this case, have the vehicle checked
by an authorized HYUNDAI dealer.
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Check fuel cell system! Stop
safely immediately
This warning message is displayed
when any serious malfunction of the
fuel cell system is detected.
In this case, immediately park the
vehicle at a safe area and turn off the
vehicle. Then turn the vehicle on
again.
If the message is displayed again,
have the vehicle checked by an
authorized HYUNDAI dealer.
Unable to start vehicle! Check
high voltage system
This warning message is displayed
when there is a malfunction with the
high voltage system.
If the vehicle will not turn on, have
the vehicle checked by an authorized
HYUNDAI dealer.Unable to start vehicle.
Hydrogen too low
This warning message is displayed
when the fuel is empty and the vehi-
cle is not turned on. The vehicle will
not turn on and we recommend that
you have your vehicle inspected by
an authorized HYUNDAI dealer.
Check FCEV System! Stop and
turn vehicle Off
This warning message is displayed
when there is a temporary malfunc-
tion with the FCEV system. Stop the
vehicle at a safe area and turn off the
vehicle. Then turn on the vehicle
after a while. If the message is dis-
played again, have the vehicle
checked by an authorized HYUNDAI
dealer.Check 12V battery. Stop safely
and engage parking brake
This warning message is displayed
when the voltage of the auxiliary bat-
tery is low. Stop the vehicle at a safe
area and turn off the vehicle. Then
turn on the vehicle after a while. If the
message is displayed again, have
the vehicle checked by an authorized
HYUNDAI dealer.
Low fuel
This warning message is displayed
when you need to refuel the vehicle.
Refuel the vehicle immediately at a
nearby fueling station.
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FCEV mode
Entering FCEV Mode
If you select the "FCEV" menu in the AVN home screen
or the "FCEV" in the menu, you can enter the FCEV
mode.
For details on FCEV Mode, refer to the navigation manu-
al that is provided separately.
FCEV Mode Menu Screen
1. Reachable Range: It shows the reachable range on the
map.
2. Fuel cell monitoring: It shows the battery information
and the power transmission flow between the compo-
nents.
3. ECO Driving: It shows the fuel efficiency information
and environmental contribution.
4. Management : It shows the status of hydrogen tank
(warning alert) and 'FCEV Route' setting.
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Hydrogen fuel economy
1. Fuel Efficiency Graph: It shows fuel efficiency informa-
tion of the last 45 minutes.
2. Average Fuel Efficiency (MPGe): It shows the average
fuel efficiency.
3. Initialization: It initializes the fuel efficiency graph infor-
mation.
ECO contribution
You can check the amount of purified air and CO2 reduc-
tion rate.
- Air purification
It shows the amount of air that adult(s) breathe(s) per
day is purified
- CO2 reduction
It shows that the same amount of CO2 exhausted by an
equal class gasoline vehicle is reduced.
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Management
1. Hydrogen Tank : It shows the temperature, pressure
and status of the hydrogen tank while driving.
2. Warning [Destination unreachable warning]
You can set to have the warning pop up when the vehi-
cle cannot reach the destination with the current
remaining hydrogen fuel.
3. FCEV Route [Display FCEV Route Bar on Map]
You can set to indicate the FCEV route and reachable
range on the map screen.
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If you do not start the vehicle imme-
diately after pressing the 12V Battery
Reset switch, the power of 12V bat-
tery is automatically disconnected
after few seconds to save the 12V
battery from additional discharge. If
the 12V battery is disconnected prior
to starting the vehicle, press the 12V
Battery Reset switch again and then
immediately start the vehicle as
explained.
Repeated use of the 12V Battery
Reset switch without a sufficient ON
cycle (30 Min+) may cause over dis-
charge of the 12V battery, which will
prevent the vehicle from starting. If
the 12V battery is over discharged to
a point that the reset does not work,
try to jump-start the vehicle.Information
After starting the vehicle ( indica-
tor on), the 12V battery is being
charged whether the accelerator pedal
is depressed or not.
❈ ❈
For more details regarding the
jump start, refer to the 'Jump star-
ing' in Owner's manual Chapter 6.
Emergency while driving
If an accident occurs
1. Stop the vehicle, put the gear into
the P (Park) position, set the park-
ing brake, and turn the vehicle off
to prevent the hydrogen and cur-
rent from leaking.
The flow of hydrogen into the fuel
cell stack will be shut off to prevent
the current from being generated.
2. Evacuate to the safety place.
3. Call emergency services for help
and let them know the vehicle is a
Fuel Cell Electric Vehicle.
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If a fire occurs
1. Stop the vehicle, put the gear into
the P(Park) position, set the park-
ing brake, and turn the vehicle off
to prevent the hydrogen and cur-
rent from leaking.
The flow of hydrogen into the fuel
cell stack will be shut off to prevent
the current from being generated.
2. If the fire is small, which can be
extinguished with fire extinguisher,
use carbon dioxide extinguisher.
You can also extinguish the fire
with water when the vehicle power
is turned off.If the fire is too big to be extinguished
with the fire extinguisher, evacuate
from the vehicle, call the fire depart-
ment, and let them know the vehicle
is a Fuel Cell Electric Vehicle. Do not
come close to the vehicle until the
fire is totally extinguished.
Emergency venting of hydrogen
gas
If the temperature near the safety
valve located at the rear under vehi-
cle is over 110°C caused by a fire or
other reasons, the safety valve will
open to vent hydrogen gas. Venting
the hydrogen gas makes a loud
noise because the venting speed is
very fast. Stay well away from the
vehicle. This jet stream of hydrogen
gas could ignite.
If a submersion in water occurs
If your vehicle was flooded and has
soaked carpeting or water on the
flooring, you should not try to start
the vehicle by pressing the POWER
button.
Call an authorized HYUNDAI dealer. Do not use water to extinguish a
fire when the vehicle power is
turned on. Serious electric
shock may result.
WARNING

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If you have a flat tire while driv-
ing
If a tire goes flat while you are driving:
1. Take your foot off the accelerator
pedal and let the vehicle slow
down while driving straight ahead.
Do not apply the brakes immedi-
ately or attempt to pull off the road
as this may cause a loss of con-
trol. When the vehicle has slowed
to such a speed that it is safe to do
so, brake carefully and pull off the
road. Drive off the road as far as
possible and park on firm, level
ground. If you are on a divided
highway, do not park in the median
area between the two traffic lanes.
2. When the vehicle is stopped, turn
on your emergency hazard flash-
ers, set the parking brake and put
the gear into the P (Park) position.
3. Have all passengers get out of the
vehicle. Be sure they all get out on
the side of the vehicle that is away
from traffic.
If the vehicle stalls while driving
1. Reduce your speed gradually,
keeping a straight line. Move cau-
tiously off the road to a safe place.
2. Turn on your emergency flashers.
3. Try to start the vehicle again. If
your vehicle will not start, contact
an authorized HYUNDAI dealer.
If the vehicle stalls at a cross-
road or crossing
If the vehicle stalls at a crossroad or
crossing, set the gear in the N
(Neutral) position and then push the
vehicle to a safe place.
Exhaust pipe
The FCEV is driven by electricity
which is generated when the oxygen
in the air and the hydrogen in the
vehicle is combined. The principle is
the opposite of the electrolysis of
water; the decomposition of water
making hydrogen and oxygen.
The FCEV is emission-free and
water is created when the hydrogen
and oxygen reacts in the process of
making the electricity. Some water
may be discharged through the
exhaust pipe when the vehicle is
turned off after driving. This is normal
but be careful in winter as the puddle
made by the exhausted water may
freeze resulting in accident.
Also, take cautious as the exhausted
steam may reach the vehicle parked
in the back when you turn off the
vehicle in winter.

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Hydrogen station
You can search the hydrogen fueling
station and set the station as the
destination in the AVN screen. Select
'Menu-Nearby POI' in the map
screen and select 'Fuel stations' to
see the list of stations. Set the near-
est station as the destination. Check
the station operation status and
opening hours before visiting the sta-
tion.
Fully refueling the vehicle may be
impossible depending on the station
condition and the reachable range
may change accordingly.
Also, the refueling time may vary
depending on the hydrogen fueling
pressure and ambient temperature.
The reachable range may change
according to the driving environment
(weather, traffic, etc.) and driving
method (sudden acceleration, heat-
ing and air conditioning, etc.).
* Refueling the hydrogen gas must
be done by the person who has
completed the certification course
and training related to the high-
pressure gas. Self-refueling is pro-
hibited.

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CategoryQuestionsAnswers
Vehicle
overview
(10 items)
1. Does a Hydrogen Fuel Cell Electric
Vehicle (FCEV) have similar performance
to standard, non-electric vehicles?FCEV performance characteristics are generally equivalent to stan-
dard vehicles, but with better noise control.
2. If water floods the fuel cell power module
compartment, due to heavy rain or flood-
ing for example, will it have any effect on
the vehicle?
Every component housed in the fuel cell power module compart-
ment is designed to be waterproof through evaluation which meets
the IP69K standard, so you don't have to worry about any potential
faults or safety problems if water contacts the fuel cell. However, if
the vehicle is fully flooded, have the vehicle checked by an author-
ized HYUNDAI dealer.
3. When starting or stopping the vehicle,
there's a noise. Is this noise cause for
concern?
The sound you hear is normal. The noise emanates from the blower
motor starting up to remove any residual water vapor in the fuel cell
system.Also, when you turn on the vehicle you may hear a brief oper-
ation sound from the hydrogen storage system which is located on the
back of the vehicle. This is a normal sound which is occurred when the
system tries to balance the pressure between the hydrogen tanks.
4. Is there a possibility that extremely cold
weather can prevent vehicle startup?
In most instances, the vehicle can get startup in cold weather with-
out any problems. However, the vehicle may not start if the vehicle is
parked with the ignition off for over a week in cold temperatures. In
this case, turn on the vehicle 2-3 times repeatedly. If you will not be
turning on the ignition for more than a week in cold weather, it is
recommended that you park the vehicle inside a building, if possible.
Notice)
In particular, make sure to park the vehicle indoor when the temper-
ature is below -30°C. If the vehicle is parked outside for over 12
hours under such weather fuel cell components may be damaged.
Also, avoid driving under such weather to prevent damaging the fuel
cell components.