Use and Care Manual

64
PART 13 – TROUBLESHOOTING
TROUBLESHOOTING CHART
PROBLEM POSSIBLE CAUSES
POSSIBLE REMEDIES
No electrical power to the appliance
1. Is the plug on the power supply cord unplugged from the
electrical outlet?
2. Is electrical panel’s 10 Amp circuit breaker tripped?
3. Is the fuse on the circuit board good?
4. Is there a power outage to the home?
1. Reset the plug.
2. Reset the circuit breaker.
3. If the display panel is blank, unplug the unit or contact an
authorized service technician.
4. Contact the power company.
No water available when a faucet is
opened
1. Is the water supply valve shut off at the meter (do cold
water faucets work)?
2. Is the water supply valve near the unit open?
3. Is the water pipe frozen?
4. Is an error code ashing on the display panel (leak
detected)?
1. Open the closed supply valve.
2. Open the water supply valve.
3. Turn OFF the unit, close all water valves and the gas
valve. Contact an authorized service technician.
4. Refer to error code information and contact an authorized
service technician.
Hot water is not available when the
faucet is opened.
1. Does the appliance have power (plugged in)?
2. Is the appliance turned ON?
3. Is an error code ashing on the display panel?
4. Is the gas supply valve open or shut off at the meter (do
other gas devices work)?
1. Restore electrical power to the unit.
2. Press and hold the Power button to turn the unit ON.
3. Refer to the Diagnostic and Error Codes section in this
manual.
4. Open the gas supply valve.
The water temperature is not hot
enough or turns cold during use.
1. Is the faucet open enough to draw at least 0.6 gallons
(2.3L) per minute through the appliance?
2. Is an error code ashing on the display panel?
3. Is the outlet water temperature set too low?
1. Open the faucet to allow more water ow.
2. Refer to the Diagnostic and Error Codes section in this
manual.
3. Adjust the outlet water temperature (refer to the procedure
in this manual).
It takes a long time before hot water
ows from the faucet.
Is the faucet some distance from the appliance?
a. Allow time for the cold water already in the pipes to ow
from the faucet.
b. Have recirculation valves and/or plumbing return line(s)
installed and program the unit for recirculation mode.
The water is not hot enough. Is the water temperature set too low? Adjust the temperature setting.
The water at the faucet is too hot. Is the water temperature set too high? Adjust the temperature setting.
A fan can be heard even when the unit
is not operating.
1. The fan continues to operate after the burner shuts off to
clear the exhaust vent of combustion gases.
2. The fan may run to help prevent freezing.
1. This is normal operation – no action is required.
2. Protect the appliance from freezing temperatures or shut
off and drain the unit.
White “smoke” can be seen coming out
of the exterior exhaust gas vent.
Depending on the outside temperature, water vapor can be
produced as the exhaust is vented.
This is normal operation – no action is required.
Display
Condition
Diagnostic
Possible Corrective Actions
Nothing appears on the
display control panel but
the blower runs at full
speed Nothing appears
on the display control
panel and no other
appliance components
are operating
Control is not receiving
power Control is not
receiving 120V power
Check wiring for short circuit or incorrect wiring
Correct wiring per wiring diagram including
connection of transformer to the control
Check transformer connection to the control
per wiring diagram. Check for 12V output of
transformer
Replace transformer if it is receiving 120V, but
not outputting 12 VAC
Ensure service switch and/or circuit breaker to
appliance is turned ON
Turn on service switch or circuit breaker to
power appliance
Is there 120V at the service switch
Troubleshoot and correct the power supply to
the manual switch
Is the ON/OFF switch inside the appliance
cabinet is turned on
Turn ON the manual power switch inside the
appliance cabinet
Check for 120V at the line voltage terminal
block located inside the appliance cabinet
Correct wiring inside the appliance cabinet
using the wiring diagram in the installation
manual
Inspect the fuse. Replace as necessary
Replace the fuse with the proper part found in
the replacement part section of this manual.
If fuse blows again, recheck the wiring per
diagram
Table 29 – Troubleshooting Chart
DIAGNOSTICS AND SUGGESTED CORRECTIVE ACTIONS
The appliance control is able to record information about the appliance’s condition at the time of the ve previous faults or errors. This information is
available to view in the Installer Mode under the History screen.
The following screens may be displayed when reviewing the appliance history. The table below also includes diagnostic information and possible
corrective actions.