5 Times
2 Times 17 IPM protection
Abnormal current value at the IPM is detected. Heat radiation is blocked (inlet/outlet).
-Check If outdoor fan is defective (does not rotate).
-IPM/Controller PCB defective. Check refrigeration cycle for under/over charge conditions.
3 Times 18 CT error
Current transfer error – The current value during the operation after 1 minute from starting up the compressor drops to zero (0) amps.
-Check if CT wire is open. See Service Manual for schematic on each model. -Controller PCB defective.
5 Times 1A Compressor location error
Compressor detection – The compressor speed does not synchronize with the control signal. (Including start up failure of the
compressor.)
-Check if 2-way valve or 3-way valve are open. Check the compressor (Winding resistance value, loose leak wire).
-Check refrigeration cycle condition.
6 Times 1B
Outdoor fan error
(DC motor)
Condenser fan motor error – Abnormal current or fan motor lock error was detected.
-Check fan motor connector loose/defective contact. Rotate fan motor by hand to ensure it is not locked. Check DC 150-380V on fan
motor between red & black wire. Check DC 15V between black & white wire. Voltage not present.
-Controller PCB defective.
7 Times 1F
Model match error connected
indoor unit error
Apparent model information error from EPROM (miss match). 3 continuous failure of lead test of EPROM at power on, voltage drop or
noise, etc. -Controller PCB defective.
6 Times
2 Times No display Indoor fan lock error
Evaporator fan motor error – The indoor fan speed is 0 RPM after 56 seconds from starting operation.
-Check if fan motor connector is loose/defective contact. Rotate fan motor by hand to ensure it is not locked.
-Controller PCB defective.
3 Times No display Indoor fan speed error
Evaporator fan motor error – The indoor fan speed is 1/3 of the target frequency after 56 seconds from starting operation.
-Check if fan motor connector is loose/defective contact. Rotate fan motor by hand to ensure it is not locked.
-Controller PCB defective.
7 Times
2 Times 0F
Discharge temperature
error
The discharge temperature error is activated. Heat radiation is blocked.
-Check for closed 2-way valve or 3-way valves. Check for leaks at line set, condenser and/or evaporator.
-Refrigeration cycle defective. Check for restrictions at line set, low charge.
3 Times 24
Excessive high pressure
protection on cooling
Excessive high pressure protection on cooling mode has been activated. Heat radiation is blocked.
-Check for closed 3-way valves. Check for running compressor with outdoor fan off.
-Check outdoor fan is defective. Refrigeration cycle defective. Check for high pressure, over charged.
5 Times 16 Pressure switch error
If the pressure switch is open for 10 seconds when the power is turned on. – Error will reset when pressure becomes normal.
-Check interruption of heat radiation (air intake/outlet). Check outdoor fan operation (does not rotate).
-Check refrigerant cycle. Check for high pressure, over charged.
7 Times 6 Times 2b
Compressor temperature
error
When the compressor becomes hotter than 226.4°F (108°C), unit stops.
-Check for closed 2/3 way valves, EEV failure, low charge, compressor thermistor failure, outdoor fan failure or outdoor heat exchanger
clogged.
8 Times
2 Times 19
Active lter error
(permanent stop)
Outdoor voltage error of Active Filter is detected.
-Check the wiring connection (connector is loose/open. Choke coil) -Active Filter Module/Controller PCB defective.
3 Times 19 Active lter error
Output voltage error of Active Filter is detected.
-Check the wiring connection (connector is loose/open. Choke coil) -Active Filter Module/Controller PCB defective.
4 Times 25 PFC circuit error Excessive voltage of DC V on PFC circuit in inverter PCB is detected. -Controller PCB is defective.
All LED’s blink
Operation, Timer, Air
Clean On/Off
11 Model match error
Apparent model information error from EPROM (miss match). 3 continuous failure of lead test of EPROM at power on, voltage drop or
noise, etc. -Controller PCB defective.
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