Installation Manual and Owner’s Guide WHO-321064-NG, WHO-321064-LP
ECOHOT
TM
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FREEZE PROCTECTION DEVICES
This appliance comes equipped with heating blocks to prevent freezing which can damage the heat
exchanger. For this freeze prevention system to operate there has to be electrical power to the
appliance. Damage to the heat exchanger caused by freezing temperature due to power loss is not
covered under the warranty. This water heater has been rated for temperatures down to 5°F (-15°C)
in wind free environment. If you install the water heater in an area that is subject to temperatures
(including wind chill) below 5°F (-15°C), this will void warranty and ECOHOT will not be
responsible for any damage to the heat exchanger as a result of freezing.
If you will not be using your heater for a long period of time or if the temperature (including the
wind chill) drops below 5°F (-15°C) turn off your heater and drain the appliance of water.
Error Code
Error
Code
Description
Reasons/Repair
E0
Inlet water temperature
sensor.
◎
Possible short in sensor/may need replacement of
sensor/check wire to water temperature sensor it may be
disconnected.
E1
Ignition fail or lost flame
◎
Hardware error in detecting the flame feedback/check gas
supply/call ECOHOT.
◎
No flame detection after ignition 6 seconds/check gas
supply/call ECOHOT
◎
Lost flame when burning/check gas supply/call ECOHOT
E2
Communication Error
◎
Hardware error in PCB controller/call ECOHOT.
E3
Fan voltage error
◎
Fan driver error, cannot detect voltage or current/check
power supply.
◎
Vent pipe is blocked or wind pressure is to high/check
flue pipe-exhaust for blockage/call ECOHOT.
E4
Fan error
◎
Fan not working/check power supply.
◎
Low fan speeds/check for blockage of exhaust/call
ECOHOT
E5
Overheat
◎
Water temperature more than (185°F/ 85°C)/outlet water
temperature sensor not working/thermostat is not working
properly/loose wire to sensor/call ECOHOT
E6
Outlet water temperature
error
◎
Possible short in sensor/may need replacement of
sensor/check wire to water temperature sensor it may be
disconnected.
E7
Selection switch error
◎
Controller board error/ Call ECOHOT
E8
Heat Exchanger temp
sensor error
◎
Possible short in sensor/may need replacement of
sensor/check wire to water temperature sensor it may be
disconnected.
F1
Hi Limit thermostat open
◎
Controller board error/ Call ECOHOT
F2
Gas Valve driver circuit
◎
Controller board error/ Call ECOHOT
