2021 HONDA CLARITY FUEL CELL radiator cap

15
Quick Reference Guide
High Voltage Components, High Voltage Cables and High Temperature
Components
Fuel cell vehicles have high voltage components (about 500 V maximum) such as the FC stack, FCVCU, High Voltage battery, power control
unit, high voltage cables (identified by their orange covers), el ectric motor, and high temperature parts such as the radiator. Labels with
handling warnings are attached to these components.
WARNING
This vehicle has high voltage circuits and
parts. Failure to observe the following
precautions can result in burns or electric
shock.
●Do not remove, disassemble, or replace
the high voltage parts, cables (orange) or
their connectors.
●Never touch the High Voltage battery
service plugs.
In an emergency or during maintenance or
repair, the service plugs are removed to cut
off the electric flow from the battery. These
plugs are in contact with the battery and
can cause severe electric shock if not
handled properly.
Only a qualified technician should handle
any electrical equipment. For inspection
and repair, consult an authorized Honda
Clarity Fuel Cell dealer.
12V DC/DC Converter
●A/C Compressor●A/C Heater
Radiator a Air Pump FC Stack b Air Pump Power Control Unit High Voltage Battery
●Electric Motor●Power Control Unit
Labela Radiator Cap b FCVCU and FC Stack
FCVCU b
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461
uuMaintenance Under the Hood uInverter Coolant
Continued
Maintenance
Inverter Coolant
This coolant is premixed with 50% an tifreeze and 50% water. Do not add any
straight antifreeze or water.
We recommend you check the inverter cool ant level every time you refuel. Check
the reserve tank. Add the in verter coolant accordingly.
1. Make sure the motor and radiator are cool.
2. Check the amount of coolant in the reserve
tank.
u If the coolant level is below the MIN
mark, add the specified coolant until it
reaches the MAX mark.
3. Inspect the cooling system for leaks.
Specified coolant: Ho nda Long Life Antifreeze/Coolant Type 2
■Reserve Tank
1Inverter Coolant
NOTICE
Genuine Honda inverter coolant is a 50/50 mixture of
antifreeze and water that can withstand freezing at
temperatures as low as a bout –31°F (–35°C). If your
vehicle is consistently subjected to temperatures
below this, the concentration of antifreeze in the
coolant should be increased. Consult an authorized
Honda Clarity Fuel Ce ll dealer for details.
If Honda antifreeze /coolant is not available, you may
use another major brand of non-silicate coolant as a
temporary replacement. Check that it is a high quality
coolant recommended fo r aluminum motors.
Continued use of any non-Honda coolant can result
in corrosion, causing the cooling system to
malfunction or fail. Have the cooling system flushed
and refilled with Honda anti freeze/coolant as soon as
possible.
3WARNING
Removing the expansion tank cap while the
motor is hot can cause the coolant to spray
out, seriously scalding you.
Always let the motor and radiator cool
down before removing the expansion tank
cap.
MAX
Reserve
TankMIN
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uuMaintenance Under the Hood uInverter Coolant
462
Maintenance
1. Make sure the motor and radiator are
cool.
2. Turn the expansion tank cap 1/8 turn
counterclockwise and relieve any pressure
in the cooling system.
3. Push down and turn the expansion tank cap
counterclockwise to remove it.
4. Pour coolant into the expansion tank until it
reaches the MAX mark.
5. Put the expansion tank cap back on, and
tighten it fully.
■Radiator 1Inverter Coolant
Do not add rust inhibitors or other additives to your
vehicle’s cooling system. Th ey may not be compatible
with the coolant or with the motor components.
1 Radiator
NOTICE
Pour the fluid slowly and ca refully so you do not spill
any. Clean up any spills immediately; they can
damage components in the motor compartment.
Expansion
Tank Cap
MAX
Reserve
TankMIN
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uuOverheating uHow to Handle Overheating
512
Handling the Unexpected
■Next thing to do
Inspect the coolant level, and check the
cooling system components for leaks.u If the coolant level in the reserve tank is
low, add coolant until it reaches the
MAX mark.
u If there is no coolan t in the reserve tank,
check that the radiator is cool. Cover the
expansion tank cap with a heavy cloth
and open the cap. If necessary, add
coolant up to the base of the filler neck,
and put the cap back on.
■Last thing to do
Turn the power system on, if the message Power System Problem. Stop Driving
When Safe disappears from the driver informatio n interface after you have started
the power system, resume driving.
If the message does not disappear, contact an authorized Honda Clarity Fuel Cell
dealer.
1 How to Handle Overheating
If the coolant is leaking, contact an authorized Honda
Clarity Fuel Cell dealer for repairs.
Continuing to drive with the Power System
Problem. Stop Driving When Safe message on the
driver information interf ace may damage the motor.
3WARNING
Removing the expansion tank cap while the
power system is hot can cause the coolant
to spray out, seri ously scalding you.
Always let the motor and radiator cool
down before removing the expansion tank
cap.
3CAUTION
Never pour water or other commercial
coolants into the inve rter coolant reserve
tank. Doing so will cause damage to the
motor.
MAX
Inverter Coolant
Reserve TankMIN
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