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Alarm
Fault description
code
E0
Variant setting
error
E1
Water overtime.
Water has not
reached the set
water level for
more than 8
minutes
E2
Drain timeout.
Drain water for
more than 10
minutes and
have not yet
reached the
empty water
level.
E3
Door lock failure
E4
Overflow alarm
/ water level
sensor failure
Possible failure cause
The variant settings do not match the current
software
Variant information storage abnormality (Flash or
Eeprom failure)
The faucet is not turned on or the water flow is too
slow
The drainage pipe is not suspended
Air level sensor or air collection tube leaks
The inlet valve is damaged
The computer board is faulty (the SCR of the water
inlet valve is open or the SCR of the pump is broken)
Water level sensor failure (always maintain a
certain water level value)
Drain pump filter is dirty
The drainage pipe is blocked
Drain pump failure
The drain pump wiring harness plug is loose, not
connected, or the wiring harness is faulty.
Computer board failure (water level sensor terminal
short circuit)
Water level sensor failure (always keep higher than
the empty water level value)
The door is not closed
Door lock failure
The terminal is not plugged in or the wiring harness
is faulty.
Computer board failure (triac failure)
Inlet valve failure
The computer board is faulty (the SCR of the water
inlet valve is short-circuited)
Water level sensor failure (less than 20KHz or more
than 50KHz beyond the normal range)
The terminal of the water level sensor is not
plugged in or the wiring harness is faulty.
TABLAS · TABLES · TABELAS ·
Solution
Log in variant setting mode and reset the
variant
MCU or Eeprom
Check whether the faucet is turned on and
the size of the water flow
Hang the drain pipe
Check the water level sensor and gas
manifold assembly, or replace
Replace the water inlet valve
Replace the computer board
Replace the water level sensor
Clear pump filter
Dredging the dirty drain pipe
Replace the drainage pump
Check whether the wiring harness terminal
is firmly connected or replace the wiring
harness
Replace the computer board
Replace the water level sensor
Check if the door is closed properly
Replace the door lock
Check if the wiring harness terminals are
firmly connected or replace the wiring
harness
Replace computer board
Replace the water inlet valve
Replace computer board
Replace the water level sensor
Check whether the wiring harness terminal
is firmly connected or replace the wiring
harness
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