2322
Trouble Possible Cause Remedy
No “CL”
displaying.
Power outage.
Unit requires 120V power. Use
unit when power is restored.
Check circuit breaker and reset if
needed. Check ground fault
circuit interrupter (GFCI) if circuit
includes one and reset if
necessary.
Unit is unplugged.
Check power plug and ensure
properly plugged. Plug the power
plug properly.
There is no hot
water flow when
a hot water faucet
is opened.
No/empty fuel source.
Water valve closed.
Power outage.
Flow is too low or
became too low. (less
than 0.66 gallons per
minute (gpm) or 2.5
liters per minute (l/m).
Freezing
temperatures may
have frozen water in
the heater or hot
water system.
Fuel gas meter
special control
restrictions.
Distance from heater
to source is long.
Fuel gas valve needs to be open.
Refill source tank (if applicable).
Open the water inlet valve.
Unit requires 120V power to
operate.
Flow is below the lower limit
necessary for stable burner
operation and proper tem-
perature control. Increase the hot
water flow to enable system.
See “No Flow Due to Expected
Frozen Heater” section of this
manual for procedure to thaw
unit.
Some fuel gas valves may have
special restrictions or digital
controls that use. Consult your
gas supplier and/or a service
professional for assistance.
Allow time for hot water to travel
through system to reach the point
of use.
7. Open valves V1 and V2 into the water heater.
8. Operate the pump. Circulate the cleaning solution through the water heater for at
least 45 minutes.
9. Turn off the pump.
10. Rinse the cleaning solution from the water heater by closing valve V2 and
opening valve V4, flow water through the heater and into a container or drain for at
least five minutes.
11. Close Valve V1 and Open Valve V3 this places the house back online.
12. Disconnect all hoses.
13. It is also wise to clean the water inlet screen at this time. Close Valve V3 and V4
to do so. Clean the water inlet screen and remove any debris.
14. Replace the screen and open valves V3 and V4 once more. Checks for leaks.
15. Return heater to operation by following start up instructions.
ELECTRICAL MAINTENANCE WARNINGS
Label all wires prior to disconnection when serving controls. Wiring
errors can cause improper and dangerous operation. Always verify
proper operation after servicing.
For operating difficulties with your unit, please consult the following table for
guidance. If you need further assistance, call qualified technician. Please have
product information ready when you call including serial number, date of purchase
and error code if shown on the control panel.
Note: Please check water heater for an error code and respond according to
recommendations found in “Error Codes” portion of this manual.
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