9
Owner’s Manual
WPC-4000
SELF-DIAGNOSTIC ALARM CODES
Alarm Display
Problem
Cause
Corrective Action
Frost prevention
sensor and Abnormal
temperature sensor
value
• Indoor heat
exchanger tempera
-
ture too low
• TH3 temperature
sensor has a loose
or broken connec
-
tion
• Do not use the air
conditioner if ambient
temperature is lower
than 18°C (64°F)
• Contact a qualified
service agent
Refrigerant high
pressure switch
• Blocked air filter
• Blocked / kinked
exhaust duct
• Ambient tempera
-
ture is too high
• Clean air filter
• Ensure exhaust duct is
not blocked / kinked
• Do not use the air
conditioner if ambient
temperature is higher
than 45°C (113°F)
Abnormal tempera
-
ture sensor value
TH1(Outlet) tem
-
perature sensor has
a loose or broken
connection
Contact a qualified service
agent
Abnormal tempera
-
ture sensor value
TH2(Inlet) tem
-
perature sensor has a
loose or
broken connection
Contact a qualified service
agent
Compressor over
-
loaded
• Ambient tempera
-
ture is too high
• Unstable voltage
supply
• Defective compres
-
sor
• Do not use the air
conditioner if ambient
temperature is higher
than 45°C (113°F)
• Contact a qualified
service agent
• Replace compressor
Condensate water
level alarm
Condensate tank is full
• Empty the water tank
• After installation of the
water tank, press the
SPOT/COOL or ROOM/
COOL button to resume
operation
Drain pump alarm
Drain pump defective
or improper hose con
-
nection (including kink
or blockage)
• Check the aconnection
and hose
• Replace drain pump
Table 1- Alarm Codes