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TROUBLESHOOTING
PART 12: TROUBLESHOOTING (CONTINUED)
temperature rises.
Fault Code E19
LINE VOLTAGE E19
PUMP OFF
Description:
This display indicates that the line voltage frequency is out of range. This could happen if the unit is
being powered from a small gasoline powered generator that is not functioning correctly or over-
loaded.
Remedy:
Inspect power wiring to unit and repair as necessary. If connected to line voltage, notify power com-
pany. If connected to alternate power source such as generator or inverter, make sure the line volt-
age frequency supplied by the device is 60 Hz.
Fault Code FLU
HIGH FLUE PRESS FLU
PUMP ON
Description:
This display indicates that there is excessive flue pressure. This code will reset automatically after
the high pressure condition is resolved. The second line indicates the status of the pump.
Remedy:
1. Assure that the flue is not blocked
2. Check the switch wiring by applying a jumper in place of the switch. If the code clears with the
jumper in place REPLACE the flue switch and connect the wires to the new switch BEFORE run-
ning unit
Fault Code LEO
LOW WATER LEVEL LEO
PUMP OFF
This display indicates that there is a low water level in the main tank. This code will not allow the unit
to run until the correct water level is restored. The second line indicates the status of the pump.
Note: While the water level is low, the pump will be off.
Remedy:
1. Assure that there is adequate pressure and flow from the cold water inlet by slightly opening
the drain valve near the tank.
2. Assure that the DHW system has all air removed through a high point hot water source. I.E.
Sink or Shower.
3. Check Wiring
4. Check Probes/Replace
n
WARNING
Do not use a jumper to remedy this error. A faulty switch MUST be replaced. Failure to
do so could result in serious injury or death.
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