Hubbell G250P, Installation & Operation Manual

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58
Troubleshooting Chart
PROBLEM POSSIBLE CAUSES CAUSE REMEDY
No electrical power to the water
heater. • Is the plug on the power supply cord
unplugged from the electrical outlet?
• Is electrical panel’s 10 Amp circuit
breaker tripped?
• Is the fuse on the circuit board good?
• Is there a power outage to the
home?
• Reset the plug.
• Reset the circuit breaker.
• If the display panel is blank, unplug
the unit or contact an authorized
service technician.
• Contact the power company.
No water available when a faucet is
opened. • Is the water supply valve shut off
at the meter (do cold water faucets
work)?
• Is the water supply valve near the
unit open?
• Is the water pipe frozen?
• Is an error code flashing on the
display panel (leak detected)?
• Open the closed supply valve.
• Open the water supply valve.
• Turn OFF the unit, close all water
valves and gas valve. Contact an
authorized service technician.
• Refer to error code information
and contact an authorized service
technician.
Hot water is not available when the
faucet is opened. • Does the water heater have power
(plugged in)?
• Is the water heater turned ON?
• Is an error code flashing on display
panel?
• Is the gas supply valve open or shut
off at the meter (do other gas devices
work)?
• Restore electrical power to the unit.
• Press and hold the Power button to
turn the unit ON.
• Refer to the Diagnostic and Error
Codes section in this manual.
• Open the gas supply valve.
The water temperature is not hot
enough or turns cold during use. • Is the faucet open far enough to draw
at least 0.6 gallons (2.3 L) per minute
through the water heater?
• Is an error code flashing on the
display panel?
• Is the outlet water temperature set
too low?
• Open the faucet to allow more water
flow.
• Refer to the Diagnostic and Error
Codes section in this manual.
• Adjust the outlet water temperature
(refer to the procedure in this
manual).
It takes a long time before hot water
flows from the faucet. • Is the faucet some distance from the
water heater?
• Allow time for the cold water already
in the pipes to flow from the faucet.
• 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. • The fan continues to operate after
the burner shuts off to clear the
exhaust vent of combustion gases.
• The fan may run to help prevent
freezing.
• Normal operation, no action required.
• Protect the water heater 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.
• Normal operation, no action required.
TROUBLESHOOTING CHART