Airthereal EVT-9K User Manual - Page 14
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Malfunction Code
Error Code
Failure Reason
E1 (with 5 beeps
Leakage of electricity
sounds)
Temperature exceeds 149°F/
E2 (with 5 beeps
65°C. (It is a high temperature
sounds)
warning, not a malfunction)
E3 (with 5 beeps
Water inlet temperature
sounds)
sensor failure
E4 (with 5 beeps
Water outlet temperature
sounds)
sensor failure
No over-zero signal-The
E5 (with 5 beeps
user's home voltage is low
sounds)
or the grid input voltage
abnormal.
EC
Communication failure
Solution
Stop using the water heater and let a
professional pinpoint the leaking parts.
A. Select a lower power level or turn down
the temperature.
B. Increase water flow.
Check whether the water inlet temperature
sensor terminal is effectively plugged into
the main board.
Check whether the water outlet temperature
sensor terminal is effectively plugged into
the main board.
A. Check that the voltage meets the
installation requirements.
B. There is interference from high-power
equipment nearby.
Contact Airthereal support for assistance.
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