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10.2 Self-diagnosis
Codes
Contents
P0 Evaporator low temp. protection
P1 Defrosting or anti-cold air
Ed Outdoor unit protection /outdoor temp. sensor is circuit or
short circuit
E1 Communication protection between indoor and outdoor
units
E2 Temp. sensor T1 is open circuit or short circuit
E3 Temp. sensor T2 is open circuit or short circuit
E4 Temp. sensor T2B is open circuit or short circuit
E7 EEPROM chip malfunction
10.3 Troubles and Solutions
Before calling for service, please review the following list of common problems and
solutions.
Problem Possible Cause Solutions
Air conditioner
does not
operate at all
Power failure Wait for power restoring
The power supply is disconnected. Switch on the main power
switch
The power fuse is blown. Change the fuse
The timer is set. Wait or cancel timer setting
The batteries of the remote control
are exhausted
Change the batteries.
Air conditioner
does not
cool or
heat well
The temperature setting is too high
or too low.
Set a more comfortable
temperature.
The air filter is clogged with dust Clean the filter
The air inlet or outlet of the outdoor
unit is blocked
Clear up the block
Doors or windows are open Close the doors or windows
Air conditioner
does not
cool or
heat at all
The air inlet or outlet of the outdoor
unit is blocked
Clear up the block first, then
begin to operate.
Three-minute protection feature Wait for a while
The temperature setting is not
appropriated
Set the temperature
properly
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