page
19
Owner’s Manual
HPC-3000 / WPC-4000 / HPC-5000 / WPC-7000 / WPC-9000 / WPC-15000
Alarm Codes
SELF-DIAGNOSTIC ALARM CODES
Alarm Display
Problem
Cause
Corrective Action
Frost prevention
sensor and Abnormal
temperature sensor
value
• Indoor heat ex-
changer temperature
too low
• TH3 temperature
sensor has a loose or
broken connection
• 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 temperature
is too high
• Clean air filter
• Ensure exhaust duct is not
blocked / kinked
• Do not use the air condi-
tioner if ambient tempera-
ture is higher than 45°C
(113°F)
Abnormal tempera-
ture sensor value
TH1(Outlet) tempera-
ture sensor has a loose
or broken connection
Contact a qualified service
agent
Abnormal tempera-
ture sensor value
TH2(Inlet) temperature
sensor has a loose or
broken connection
Contact a qualified service
agent
Compressor over-
loaded
• Ambient temperature
is too high
• Unstable voltage
supply
• Defective compressor
• Do not use the air condi-
tioner if ambient tempera-
ture 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 hose connec-
tion and hose
• Replace drain pump
