Owner’s Manual
WPW-4000
SELF-DIAGNOSTIC ALARM CODES
Alarm Display
Problem
Cause
Correc ve Ac on
Frost preven on
sensor and Abnor-
mal
temperature sensor
value
• Indoor heat exchanger
temperature too low
• TH3 temperature sensor
has a loose or broken
connec on
• Do not use the air
condi oner if ambient
temperature is lower than
18°C (64°F)
• Contact a quali
fi
ed service
agent
Refrigerant high
pressure switch
• Blocked air
fi
lter
• Ambient temperature is
too high
• Leak/cut o
ff
supply
water
• Clean air
fi
lter
• Do not use the air
condi oner if ambient
temperature is higher
than 50°C (122°F)
• Check water
fl
ow
Abnormal tempera-
ture sensor value
TH1(Outlet) temperature
sensor has a loose or
broken connec on
Contact a quali
fi
ed service
agent
Abnormal tempera-
ture sensor value
TH2(Inlet) temperature
sensor has a loose or
broken connec on
Contact a quali
fi
ed service
agent
Compressor over-
loaded
• Ambient temperature is
too high
• Unstable voltage
supply
• Defec ve compressor
• Over current relay
defect or broken
connec on
• Do not use the air
condi oner if ambient
temperature is higher
than 50°C (122°F)
• Contact a quali
fi
ed service
agent
• Replace compressor
Condensate water
level alarm
Condensate tank is full
• Empty the water tank
• A er installa on of the
water tank, press the
SPOT/COOL or ROOM/
COOL bu on to resume
opera on
Drain pump alarm
Drain pump defec ve or
improper hose connec-
on (including kink or
blockage)
• Check the hose connec-
on and hose
• Replace drain pump
Table 1- Alarm Codes
