Installation manual

2726
Trouble
Possible Cause
Remedy
The volume alarm
does not sound
even though the
volume appears to
be adequate.
Units incorrect
during input
Measuring flow of
only hot water
instead of hot water
and cold water
combined
Refer to “Set a Desired
Volume” section to ensure units
(metric vs. English) and volume
(displayed volume number
represents 1/10th of the actual
total flow) is correctly set.
The volume measurement only
keeps track of the water volume
that passes through the water
heater. If hot water going to a tub
is combined with cold water, the
volume computed would not be
representative of the total
amount that may have been
dispensed.
Unresolved
problem.
Other assistance
required.
Consult qualified technician or
contact an authorized service
professional.
ON OFF
UP
DOWN
Combustion
o
F G
o
C L
Water
valve
Whenever a failure occurs, an alert sounds and a
diagnostic code is displayed to indicate the failure
mode at the time of occurrence.
The following table includes a list of diagnostic codes
that can be displayed as well as recommended
remedies to address the problem.
Control Panel Example - Displaying Error Code E2
Code
Indication
Remedy
E0
Blower system problem
occurred.
1. The blower jammed or
stopped operating because of a
foreign object.
2. The blower fan suffered a
mechanical breakdown.
3. The fan power control module
has broken down.
4. Wiring harness or wiring
connection somewhere in fan
connection has come loose.
1. Check to see if fan turns freely.
Remove any foreign objects
jamming the fan.
2. Replace the blower fan.
3. Replace the control module.
4. Reconnect as required.
E1
Outlet water temperature
sensor error.
1. The sensor plug has come
loose or failed to connect
properly to the circuit board.
2. The sensor broke down (A
short circuit, open circuit, or
accidental contact with the
casing occurred.)
3.The circuit board of the
controller malfunctioned.
4. Sensor is scaled
1. Plug in the element properly.
2. Replace the temperature sensor.
3. Replace the controller
4. Clean sensor
E2
Flame detection error.
1. The detection circuitry for
ignition and flame detection has
come loose or failed to
connect.
1. Connect the relevant circuit
properly and eliminate the bad
connection.
Replace any failed circuit elements.