W'eau WFI-028T - Error codes & Solutions; E04 Antifreeze protection; E05 High pressure protection; E06 Low pressure protection

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9. Error codes & Solutions
Code
Description
Potential reasons
Solutions
Water flow protection
Insufficient water flow
Check the water circuit system, the opening
of by-pass kits, the running of water pump
Water flow switch
disconnected
Check the wiring and reconnect water flow
switch
Water flow switch defective
Change a new one
E04
Antifreeze protection
Ambient/Inlet water temp. is
too low and the unit is on
standby
The unit will be re-started when the
ambient/inlet water temp. goes up.
E05
High pressure protection
Insufficient water flow
Check the water circuit system, the opening
of by-pass kits, the running of water pump
Ambient/ Water temp. is too
high
Fan motor speed is abnormal
or fan motor has damaged
Check the fan motor
Excess refrigerant gas
Readjust the refrigerant volume
High pressure switch
disconnected or defective
Reconnect or replace high pressure switch
Piping system jammed
Check the piping system
E06
Low pressure protection
Bad ventilation
Check the installation circumstance. Clean
the evaperator. Check the running situation
of fan.
Low pressure switch
disconnected or defective
Reconnect or replace low pressure switch
Gas leakage (Check the
gauge)
Detect the leakage point and make the
maintainence
Fan motor speed is abnormal
or fan motor has damaged
Check the fan motor
EEV blocked or piping system
jammed
Check the piping system
E09
Connection failure between
PCB and controller
Bad wire connection
Check the wiring
Defective controller
Change a new controller
Defective PCB
Change a new PCB
E10
Communication failure
between PCB and driver
module
Bad wire connection
Check the wiring
Defective PCB
Change a new PCB
Defective Driver module
Change a new driver module
E12
Exhause temp. too high
Insufficient water flow
Check the water circuit system/ water flow
switch
Lack of gas
Check if there is a gas leakage