Use And Care Manual

14
EN
Part 8 - Troubleshooting
Before calling for service check the troubleshooting list of common issues. This can save time and cost. If you are
unable to resolve a problem contact your installer or Customer Service for support.
Problem Possible Cause Solution
No hot water
and display
DOES NOT
power on
Power outage or faulty wiring
Check the power supply. Check the circuit breaker.
Ensure the breakers at main electrical panel are ON.
A breaker may be faulty or the unit may be wired
incorrectly.
Ensure the shuto valve on the unit’s incoming water
supply line is fully open.
The ow rate needed to activate
the heating element (0.5 gpm) has
not been reached.
Increase the ow rate from the water supply source.
Clean the lter screen on the unit’s water inlet.
No hot water
and display
DOES power
on
Reset the water heater.
Refer to this manual for reset points. Ensure all power
is shut o at the breaker panel before attempting to
reset the unit. Press all resets.
Potential internal part failure Call Customer Service.
Water Not Hot
Enough
Too much water owing through
the heater
Reduce the ow rate at the faucet or slightly close the
shuto valve on the unit’s incoming water supply line
to reduce ow rate
Voltage less than 240 volts
This water heater is designed to operate on 240 volts.
A lower voltage will produce less heating power. It
may be necessary to upgrade to a larger input heater.
Crossed wires Double check the wiring. Ensure it is correct.
Reduction in the ambient
temperature or temperature
setting is too low
Increase the temperature setting on the unit
Water pressure less than 7 psi
(0.5 bar)
Make sure the shuto valve is fully open and the
water supply line is not blocked
Mixing too much cold water
It is not necessary to mix as much cold water with a
tankless water heater as with a conventional storage
tank. Also, an anti-scald feature may be installed
on the faucet that is mixing cold water. These types
of features can usually be adjusted to reduce the
amount of cold water mixed.
Thermal loss due to long pipe run
As hot water runs through the system to the faucet,
some heat will be lost, especially if it has a long
distance to travel or the pipes are cold. This is normal
and can be compensated for by increasing the
temperature setting and insulating the pipes.
Electrical malfunction
Contact a qualied electrician or your local authorized
distributor for service
Water
Temperature
Varies from
Hot to Cold
During Use
Water pressure has dropped
below minimum level
Increase the ow rate from the water supply source